Pulse or digital communications inventions 05/06

20060109888 - Apparatus and method for calculating and implementing a fibonacci mask for a code generator: An apparatus and method for calculating and implementing a Fibonacci mask for a code generator is disclosed herein. The first step receives a desired code offset from a reference code state in a Fibonacci field. Next, a field vector in a Galois field with the same code offset sought in...

20060109889 - System for, and method of, providing frequency hopping: In many systems now in use for sending digital data from a controlled station (e.g., a transmitting station), generally indicated at 10 in FIG. 1, to a controlling station (e.g., a receiving station) generally indicated at 12, a plurality of hopping frequencies are provided. In such systems, a first packet...

20060109890 - Method and system for data and voice transmission over shared and dedicated channels: In one disclosed embodiment, data information is stored in a buffer in a transmitter. The data information is transmitted on a shared channel and control information for recovering the associated data information is transmitted on a dedicated channel. The shared and dedicated channels can be, for example, different portions of...

20060109891 - Reduced parallel and pipelined high-order mimo lmmse receiver architecture: Disclosed is a LMMSE receiver that restores orthogonality of spreading codes in the downlink channel for a spread spectrum signal received over N receive antennas. The FFT-based chip equalizer tap solver reduces the direct matrix inverse of the prior art to the inverse of some submatrices of size N×N with...

20060109892 - High performance wireless receiver with cluster multipath interference suppression circuit: A receiver which suppresses inter-cluster multipath interference by processing an impulse channel response consisting of two multipath clusters, each cluster having groups of signals with multiple delays. In one embodiment, the receiver includes a single antenna and parallel-connected delay units used to align the groups of signals before being input...

20060109893 - Inphase/quadrature phase imbalance compensation: A transceiver includes a transmitter, a receiver, and an electrical feedback line. The transmitter has a quadrature-modulator and is configurable to compensate inphase/quadrature phase imbalances produced by hardware of the transmitter. The quadrature-modulator is configured to quadrature-modulate a carrier wave. The receiver has a quadrature-demodulator and is configurable to compensate...

20060109894 - Adaptive modem: Disclosed is a modem that uses information from prior modem calls in a current modem call if the current communication line has the same characteristics as the communication line of a prior call. During modem training, a determination is made as to whether the characteristics of the current communication line...

20060109895 - Transmission system, signal receiver, test apparatus and test head: There is provided a transmission system for transmitting a transmission signal, having a periodic clock output section for outputting a periodic clock having a preset period, a transmitting section for transmitting the transmission signal in synchronism with the periodic clock and a receiving section for receiving the transmission signal transmitted...

20060109896 - Characterizing eye diagrams: Systems and methods of characterizing eye diagrams are described. In one aspect, at measurement times across a measurement interval spanning at least one unit interval of the input signal, corresponding levels of the input signal are classified into groups based on at least one threshold. An eye diagram characteristic width...

20060109897 - Fft accelerated iterative mimo equalizer receiver architecture: A receiver, such as a CDMA MIMO receiver, includes a LMMSE-based chip-level equalizer constructed so as to implement a FFT accelerated iterative algorithm having a complexity of order O(Nlog2(N)), where N is the dimension of a covariance matrix. The equalizer uses one of an overlap-save or an over-lap add FFT...

20060109898 - Powerline communication phy with a digital direct drive output stage: It is possible to implement a Power Line Communication (PLC) PHY utilizing a digital direct drive output stage that converts the digital output waveform into an analog signal on the power line through pulse width modulation at a very high frequency. Utilizing PWM circuitry instead of a DAC can reduce...

20060109899 - Video data encoder employing telecine detection: A video data compression system is disclosed that includes a telecine detection unit and a reverse telecine conversion unit. In accordance with an embodiment, the telecine detection unit receives input video data and produces a telecine detection signal that is representative of whether the input video data is telecine converted...

20060109900 - Image data transcoding: Various embodiments include a transcoder and a transcoding method, which combines an inverse-quantized DCT (discrete cosine transform) block with one or more transcoding matrices. The inverse-quantized DCT block represents image data compressed according to a first compression standard. A result is one or more transform coefficient matrices, which represent image...

20060109901 - System and method for drift-free fractional multiple description channel coding of video using forward error correction codes: A system and method are disclosed that provide an improved encoding scheme where input video is encoded into a base layer and a enhancement layer according to a fine-granular scalability coding to generate a plurality of equal priority descriptions, then the generated descriptions are decoded by a decoder. The plurality...

20060109902 - Compressed domain temporal segmentation of video sequences: A method for detecting scene changes in a video sequence in the compressed domain. DC images are extracted from the macroblocks of the video frames. Histogram differences and pixel difference of the DC images are used for scene cut detection, and the changes in the histogram differences are used for...

20060109903 - Method and apparatus for providing noise reduction: A method and apparatus for reducing noise in at least one frame in an image sequence is disclosed. A minimum function is applied to the at least one frame to produce a plurality of minimum values. A mask is generated in accordance with the plurality of minimum values. The mask...

20060109907 - Apparatus and method for converting image data: An image data converting apparatus comprising an MPEG2-image data decoding section 19, a scan-converting section 20, an MPEG4-image encoding section 21, and a picture-type determining section 18. The MPEG2-image data decoding section 19 decodes input MPEG2-image compressed data in both the vertical direction and the horizontal direction by using only...

20060109904 - Decoding apparatus and program for executing decoding method on computer: The generation of thumbnail images from encoded image data at high speed is carried out. In decoding encoded image data, without performing inverse DCT, only the DC coefficient among the DCT coefficients of each block is extracted. For an I picture, the DC coefficient is outputted as decoded data on...

20060109905 - Fast block mode determining method for motion estimation, and apparatus thereof: A fast block mode determining method for motion estimation, and an apparatus thereof. A cost of motion estimation for an input image frame is predicted by Kalman filtering, and one block mode is selected from a plurality of block modes. A cost for the motion estimation of the input image...

20060109908 - Method of retrieving video picture and apparatus therefor: An apparatus for retrieving a video picture includes a decoder section for decoding a coded bit stream of video picture data representing an arbitrary shape object and including shape information and texture information, a retrieval condition input section for inputting a retrieval condition for retrieval of a desired picture, a...

20060109906 - Methods and apparatus for dynamically adjusting f-codes for a digital picture header: The present invention provides methods and apparatus for dynamically adjusting f-codes for a digital picture header of a coded picture. A video encoder having at least one motion estimation stages is provided for encoding the current picture. Motion vectors are determined for one motion estimation stage of the encoder. The...

20060109909 - Decision mechanism for partition types of macro block: A decision mechanism for partition types of a macro block is provided. First, a rough motion estimation is performed on a macro block, so as to obtain a rough related information corresponding to various partition types. Then, one of the partition types is determined based on the rough related information....

20060109910 - System and method for sub-pixel interpolation in motion vector estimation: The present invention provides an efficient sub-pixel interpolation technique for motion vector estimation during video coding. In one embodiment, this is accomplished by interpolating adjacent pixels at fractional horizontal, vertical, and diagonal locations in a macroblock of (M×N) pixels, such that there are no overlapping interpolations, to generate values for...

20060109911 - Selective prediction encoding and decoding methods and selective prediction encoding and decoding devices: There are provided selective prediction encoding and decoding methods and selective prediction encoding and decoding devices. The selective prediction encoding device selects and performs one of an AC/DC prediction encoding method and an intra prediction encoding method which corresponds to the smaller of code amount from AC/DC prediction and an...

20060109912 - Method and/or apparatus for parsing compressed video bitstreams: An apparatus comprising a parsing circuit and a control circuit. The parsing circuit may be configured to generate a plurality of decoded syntax elements in response to (i) a serial bitstream and (ii) a control signal. The control circuit may be configured to generate the control signal in response to...

20060109913 - Macroblock level adaptive frame/field coding for digital video content: A method and system of encoding and decoding digital video content. The digital video content comprises a stream of pictures which can each be intra, predicted, or bi-predicted pictures. Each of the pictures comprises macroblocks that can be further divided into smaller blocks. The method entails encoding and decoding each...

20060109915 - Apparatus and method for use in providing dynamic bit rate encoding: An apparatus, system and method for use in for use in dynamically adjusting an encoder bit rate according to a determined available bandwidth for wirelessly communicating source data. A method detects a first available bandwidth, determines a first encoder bit rate according to the available bandwidth, encodes a signal at...

20060109914 - Method and apparatus for preventing error propagation in a video sequence: A method for constructing a sequence of video pictures is disclosed. A region of a video picture that is supposed to be used as a predictor to construct a block corresponding to a second picture in a video sequence is ignored when an error correction technique is used to construct...

20060109916 - System and method for coding and decoding picture signals based on a partition table including length information: Method for encoding and decoding a picture signal for detecting and correcting errors in a new structured GOB according to a data partition technique, method for encoding a picture signal, including the steps of (1) grouping picture information of one block group into respective information regions of each block, and...

20060109917 - Multi-interval line coding for high speed data communication: Binary data signal multi-line interval encoding and decoding arrangements supporting high speed data communications consistent with certain embodiments produce a signal having a plurality of pulses with a minimum pulse duration of T. The pulses are arranged in a signal pattern selected as one of M possible signal patterns of...

20060109918 - Transformer data coupler with high common mode immunity: A data coupler comprises two CMOS drivers which are supplied with a data signal and a delayed version of the data signal to drive a primary winding of a transformer with narrow pulses of opposite polarity corresponding to respective edges of the data signal. A secondary winding of the transformer...

20060109924 - Apparatus and method for signal transmission/reception according to pilot modulation in a multi-carrier communication system: Disclosed is a system and method for modulating a pilot symbol sequence in a multi-carrier communication system. The method including producing a pilot symbol sequence corresponding to a predetermined time interval by removing a data symbol sequence from time domain signal to be transmitted, the time domain signal including the...

20060109921 - Combining coefficient estimation apparatus capable of compensating for phase noise of ofdm system and combining coefficient estimation method thereof: An apparatus for receiving OFDM signals via at least two antennae is disclosed. The apparatus includes a converter for converting a plurality of OFDM symbols received via each antenna to a plurality of sub carrier signals, wherein each sub carrier signal corresponds to one of a plurality of sub carriers;...

20060109922 - Iterative channel and interference estimation with dedicated pilot tones for ofdma: Estimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. Next, an initial estimate value is selected for the interference level. The initial estimate value...

20060109925 - Method and apparatus for error reduction in an orthogonal modulation system: A method and apparatus reduces error in a communication system that includes multiple orthogonal subcarriers by suppressing a subcarrier in a transmitting communication device and by equalizing a received signal in a receiving communication device. Subcarrier suppression is based on a determination of a signal quality metric with respect to...

20060109926 - Method and apparatus for transmitting data in a time division duplexed (tdd) communication system: Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the...

20060109920 - Ofdm wireless receiver: A heterodyne receiver converts a received high frequency signal into an intermediate frequency signal and demodulates a base band signal from a intermediate frequency signal. Low-pass filters cut the high frequency components of the baseband signal, and AD converters sample the output signal of those low-pass filters, convert them to...

20060109923 - Subcarrier cluster-based power control in wireless communications: Devices, systems and techniques to monitor signal fading based on a cluster of subcarriers at a receiver and feedback monitored signal fading to a transmitter in wireless communication systems such as OFDM and OFDMA systems....

20060109919 - Wireless communications device providing time and frequency-domain channel estimates interpolation and related methods: A wireless communications device which may include a wireless receiver for receiving wireless signals comprising unknown data portions over a channel, and a demodulator connected to the wireless receiver. The demodulator may be for estimating a delay spread and a fade rate associated with the channel, determining a desired time-domain...

20060109927 - Synchronizer, method of synchronizing signals and mimo transceiver employing the same: The present invention provides a synchronizer for use with a multiple-input, multiple-output (MIMO) transceiver employing multiple individual transceivers. In one embodiment, the synchronizer includes a synthesizing unit coupled to a reference oscillator and configured to generate separately synthesized radio frequency (RF) signals having relative phase differences. Additionally, the synchronizer also...

20060109928 - Wireless system having channel fading compensation using zero-forcing: A MISO wireless LAN includes multiple inputs and a single output. The present invention includes a method and apparatus of compensating for time sensitive or frequency sensitive channel fading using zero forcing. The time sensitive channel fading is represented by the vector [H(t)], and the interference compensation is performed by...

20060109929 - Methods and apparatus for interface buffer management and clock compensation in data transfers: A circuit for data stream buffer management, lane alignment, and clock compensation of data transfers across a clock boundary using a single first in first out (FIFO) buffer in each serial channel is described. The RapidIO® data channel, for example, operates using a clock recovered from the data stream. The...

20060109930 - Method and device for deriving a predistorted signal: A device for deriving a predistorted signal for provision to a non-linear element comprising memory for storing a plurality of data samples that define a segmented approximation of distortion curve characteristics for the non-linear element where the plurality of data samples define the segment boundaries and a predistortion module for...

20060109931 - Mobile communication receiver and transmitter: A receiver for mobile communication includes a wireless scheme parameter storing unit (23) configured to store a plurality of characteristics of multiple wireless schemes, a wireless scheme estimation unit (22) configured to estimate one of the characteristics of a currently used wireless scheme from a received signal and select one...

20060109932 - Ofdm pre-equalizing: For example in case of an OFDM multicarrier transmission system the transmission characteristics of subcarriers of a multicarrier transmission system using a plurality of antenna elements (3, 3′) can be adjusted. Particularly the power and the phase of the subcarriers can be adapted. To this object the subcarrier frequency channel...

20060109933 - Methods and apparatus for symmetrical phase-shift keying: Methods and apparatuses employing symmetrical phase-shift keying (SPSK) for data modulation and demodulation. Each symbol in a transmission signal carries n-bit information and is transmitted with one of 2n+1 directions. Half directions among the 2n+1 directions are regarded as default directions and the remaining are regarded as complementary directions. Each...

20060109934 - Method and apparatus to estimate channel tap: Briefly, a method an apparatus and a wireless communication device are provided. The wireless communication device includes a receiver to receive complex sequences of symbols. The receiver includes an estimator to estimate one or more channel taps. The estimator includes a memory to store at least a portion of one...

20060109935 - Receiver system and method for soft-decision decoding of punctured convolutional codes in a wireless communication system: A receiver system of a wireless communication system comprising means for receiving and decoding of punctured convolutional codes and characterized by comprising a soft-decision processing unit adapted to receive a number of quantized signal soft-decision values spread across a range, the range having a maximum value, a minimum value, and...

20060109936 - Non-coherent dp-mok reception process with combination of multiple paths and corresponding receiver: Process for non coherent DP-MOK reception with combination of multiple paths and corresponding receiver. According to the invention, demodulation of orthogonal signals (MOK) is combined with a differential phase demodulation (DP) and diversity processing related to multiple paths in the radiofrequency channel. Diversity processing is achieved making use of differential...

20060109938 - Interference suppression with virtual antennas: A receiver suppresses co-channel interference (CCI) from other transmitters and intersymbol interference (ISI) due to channel distortion using “virtual” antennas. The virtual antennas may be formed by (1) oversampling a received signal for each actual antenna at the receiver and/or (1) decomposing a sequence of complex-valued samples into a sequence...

20060109937 - Wireless system having channel fading compensation using minimum mean square error: A MISO wireless LAN includes multiple inputs and a single output. The present invention includes a method and apparatus of compensating for time sensitive or frequency sensitive channel fading using minimum mean square error. The time sensitive channel fading is represented by the vector [H(t)], and the interference compensation is...

20060109941 - Log-sampled filter system: This invention provides a filter system which may be implemented with less hardware and software resources than traditional filters. In addition, the filter system structure reduces the complexities typically associated with filter design by permitting direct specification of the filter frequency response. Thus, the filter system may adaptively change the...

20060109939 - Noise reduction filtering in a wireless communication system: A technique for noise reduction in a wireless communication system uses controllable bandwidth filters (120) to filter a received signal. In a typical implementation, the filters (120) are used at baseband frequencies. A measurement (RSSI) is indicative of the strength of the received signal. A control circuit (144) generates a...

20060109940 - Timing bias compensation for a data receiver with decision-feedback equalizer: A phase adjustment apparatus and method adjusts phase or timing bias of a sample clock in a data receiver system by determining a time adjustment value as a function of equalizer feedback. The time adjustment value is then applied to a device capable of adjusting a timing bias of a...

20060109942 - Improvements to data recovery circuits using oversampling for best data sample selection: An improved data recovery circuit based on an oversampling technique to select the best data sample to be kept as the data to recover that is only based on accumulating the data edges (or transitions). The incoming serial data stream with jitter is oversampled in an oversampling circuit by means...

20060109943 - High performance integrated circuit with low skew clocking networks and improved low power operating mode having reduced recovery time: An integrated circuit includes a phase-locked-loop with fast clock synchronization recovery. A phase frequency detector is configured to receive a system clock signal and a feedback clock signal and to generate a comparison signal. A clock generator is configured to general a first clock signal based on the comparison signal,...

20060104332 - Apparatus and method for defining symbol timing window and capturing signal: An apparatus and a method of defining symbol timing window and capturing signal are provided for a UWB receiver. The present invention is characterized in delaying a start point of a symbol timing window for a preset time T. According to the symbol timing window, a serial symbol signals are...

20060104333 - Acknowledgment for a time division channel: A communication unit (101) and corresponding methods are arranged and constructed to detect acknowledgment messages as an Originator or respond with an acknowledgment message as a Target on a time division channel. The communication unit includes a transceiver (201) configured to support air interfaces (113, 115) with other communication (103,...

20060104334 - Virtual cell mapping in macrodiverse wireless networks with frequency hopping: A communication system for communication with mobile stations through a plurality of base stations at macrodiverse locations and with frequency hopping (FH). Two or more adjacent base stations communicate with mobile stations in a region between the adjacent base stations using coordinated orthogonal frequency hopping sequences. The communication system operates...

20060104335 - Low-rate long-range mode for ofdm wireless lan: A system for implementing an orthogonal frequency division multiplexing scheme and providing an improved range extension. The system includes a transmitter for transmitting data to a receiver. The transmitter includes a symbol mapper for generating a symbol for each of a plurality of subcarriers and a spreading module for spreading...

20060104336 - Rake receiver with multi-path interference accommodation: A method of extracting data from a received signal including multi-path interference in a rake receiver. The method includes sampling and filtering the received signal; estimating a time delay (a) between paths for the filtered samples Ψ(τ); and estimating channel complex coefficient (b) for the filtered samples Ψ(τ). Transmitted data...

20060104337 - Circuit and method for adjusting timing alignment using programmable codes: A method is provided for adjusting timing alignment in which a receiver generates a plurality of imbalanced correction codes (1310), and square waves both having the same frequency. The receiver mixes the imbalanced correction codes with the square waves to create a mixed signal (1320), and integrates the mixed signal...

20060104338 - Communication apparatus: A communication apparatus includes a pair of communication connectors to be connected with a pair of external apparatuses; a communication controller to generate transmitting data to be transmitted to the pair of external apparatuses and receive receiving data from the external apparatus to perform a predetermined function; and a data...

20060104339 - Systems and methods for adaptive vdsl with variable sampling frequency and time-domain equalizer: A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if...

20060104340 - Open-loop rate control for a tdd communication system: Techniques for performing open-loop rate control in a TDD communication system are described. The channel quality of a first link is estimated based on a transmission received via the first link. The channel quality of a second link is estimated based on the estimated channel quality of the first link...

20060104341 - Systems and methods for providing training data: The disclosure relates to systems and methods for providing training data in packets transmitted to one or more receivers. The systems and methods measure at least one receiver performance metric associated with operating conditions of a given receiver. The at least one receiver performance metric is compared to at least...

20060104342 - Adaptive coefficient signal generator for adaptive signal equalizers with fractionally-spaced feedback: An adaptive coefficient signal generator for use in an adaptive signal equalizer with fractionally-spaced feedback. The signals representing the feedback tap coefficients are generated in conjunction with a timing interpolation parameter such that the fractionally-spaced feedback circuitry dynamically emulates symbol-spaced feedback circuitry....

20060104343 - Pwm generator providing improved duty cycle resolution: A PWM generator system provides improved duty cycle resolution using a sub-cycle generator for generating a sub-cycle with a period that is a small fraction of the maximum PWM period to be generated. An integral sub-cycle estimator is coupled to said sub-cycle generator for determining the integral number of said...

20060104347 - Data mixer for portable communications devices: Methods and systems are provided for combining a plurality of data streams into a single data stream for sending to a wireless user. According to the invention, using one or more data mixers, two or more video streams are combined into a single video stream and provided to a wireless...

20060104345 - Method and apparatus for controlling a video surveillance display: A method and apparatus for controlling a video surveillance display comprising receiving an MPEG video stream comprising video data in I-frames and P-frames, storing the MPEG video stream in an input buffer, displaying the stored MPEG video stream in full-motion video, monitoring the amount of video data stored in the...

20060104344 - Method and apparatus for synchronized recording of audio and video streams: A method for synchronized recording of audio and video signals is provided. The video signals are grouped into a plurality of video frames. The method comprises the steps of incrementing a counter value of an audio counter when an audio signal is received; and recording the current counter value of...

20060104348 - Systems and methods of flexible power management applicable to digital broadcasting: A system for receiving a digital broadcast includes an input terminal that receives the digital broadcast containing scalable data, and a controller for controlling an operation mode of the system. In addition, the system may also include a processor that decodes the data, and a power management device that varies...

20060104346 - Video rate control: A model-based rate control mechanism involves the percentage of less probable symbols (LPS). The mechanism is first described in the context of bi-level video and subsequently extended for multi-level video by applying it to individual bit planes thereof. A model parameter represents a relationship between an LPS reduction ratio and...

20060104352 - Block matching in frequency domain for motion estimation: The invention provides a method to reduce the computation complexity by performing the motion estimation in the frequency domain with tiny hardware overhead and a little modification of the video compression algorithms. Since human eyes are not so sensitive in the high frequency range as in the low frequency range,...

20060104349 - Low-complexity deblocking filter: A method of filtering to remove coding artifacts introduced at block edges in a block-based video coder, the method having the steps of: checking the content activity on every line of samples belonging to a boundary to be filtered and where content activity is based on a set of adaptively...

20060104354 - Multi-layered intra-prediction method and video coding method and apparatus using the same: A video coding method using a multi-layer structure, and more particularly, a method and apparatus for facilitating a search for an intra-prediction mode in an upper layer using an intra-prediction mode in a lower layer while efficiently and compressively encoding the searched intra-prediction mode are provided. The intra-prediction method includes...

20060104350 - Multimedia encoder: A video bit stream having a constant frame rate is generated from an input having a frame rate that is different than the constant frame rate. Zero-motion difference frames are added to the bit stream to achieve the constant frame rate. Bit rate control may include using a state transition...

20060104353 - Video signal preprocessing to minimize prediction error: Systems and methods for preprocessing a video signal are disclosed. In one method, a video signal is preprocessed prior to encoding by a motion compensated prediction encoding system. The method includes modifying an input video signal to maximize the input video signal's conformance with a prediction model used by the...

20060104351 - Video/image processing devices and methods: Video/image processing devices. A memory stores first processed data, second processed data, and discrete cosine transformed data. An MPEG subsystem processes an MPEG codec according to first input data and the discrete cosine transformed data, and generates the first processed data and a first trigger signal in response to receiving...

20060104355 - Method for setting the threshold of a fast motion estimation algorithm: A method for setting the threshold of a fast motion estimation algorithm, which improves the accuracy precision of motion vectors at the edges of objects and the algorithm efficiency in the background area when used together with threshold-based fast motion estimation algorithms. The steps of the method includes determining whether...

20060104356 - Timing for decoder buffer examination: Techniques and tools are described for using various bitstream elements to determine a time interval between successive examinations of a decoder buffer while decoding a video bitstream. For example, a first bitstream element in a first syntax layer above frame layer in a video bitstream is processed. That element indicates...

20060104357 - Video coding: Coding of a video signal is provided according to a predefined standard, wherein in a given operation mode some of the tools provided by the predefined standard are disabled, and wherein an identification of the disabled tools is included in the bit-stream, the disabled tools being one or more out...

20060104358 - Method and apparatus for motion estimation using adaptive search pattern for video sequence compression: In a method for motion estimation using adaptive patterns in a video sequence compression system, an initial search pattern located at a center of a search window in a block of a video frame is determined. A location of a minimum block distortion measure (BDM) is searched in the initial...

20060104360 - Method and system for using motion prediction to equalize video quality across intra-coded frames: In a video processing system, a method and system for using motion estimation to equalize video quality across intra frames are provided. Inter-prediction processing may be enabled for macroblocks in an “I” frame to generate temporal statistics. The inter-prediction processing may comprise motion estimation and motion compensation. Spatial statistics may...

20060104359 - System and method for fast variable-size motion estimation: Methods and systems for fast variable block-size motion estimation based on merging and splitting procedures for AVC video encoding are disclosed. The methods take advantage of the correlation of the Motion Vectors (MVs) of the different block-size modes to achieve a good computation reduction. Considering that the smaller the block-size...

20060104361 - Variable-length coding apparatus and variable-length coding method: A variable-length coding apparatus which receives image data block by block, and generates coded data from syntax elements includes a storage unit that temporarily stores the image data, a first syntax element calculating unit that calculates a first syntax element from the image data, at the same time the image...

20060104362 - Method for locating partitions of a video image: A method for locating partitions of a video image is provided. The method is used to simplify the process of obtaining the related information of neighboring partitions during the coding and decoding process for the video image. The method starts by mapping the storage units of a matrix to adjacent...

20060104363 - Video coding/decoding buffering apparatus and buffering method thereof: A video coding/decoding buffering apparatus and a buffering method thereof are provided. The method codes/decodes a current macro block to generate a corresponding unfiltered current macro block data, and a right data area and a bottom data area of the unfiltered current macro block data are stored. The unfiltered current...

20060104364 - Video decoding system of mobile broadcasting receiver: Disclosed herein is a video decoding system of a mobile broadcasting receiver. The video decoding system of a mobile broadcasting receiver for decoding a compression-coded video signal includes: at least one buffer memory for performing video decoding; a plurality of coprocessors including a data processing unit partitioned into one or...

20060104365 - Bi-directional temporal error concealment: Systems and methods for bi-directional temporal error concealment are described. In one aspect, a lost frame is detected during encoded video decoding operations. Bi-directional estimations for each pixel of the lost frame are calculated to generate a current frame for bi-directional temporal error concealment of the lost frame....

20060104366 - Mpeg-4 streaming system with adaptive error concealment: An MPEG-4 system with error concealment is provided for video service under the network with packet loss. The MPEG-4 system includes an encoder and a decoder. The encoder uses an intra-refreshment technique is used to make coded bitstream more robust against noise in order to stop error propagation. The rate-distortion...

20060104367 - Method and apparatus for improving audio-video signal sync stability in digital recording devices: Video signals are converted into a stream of digital numbers arranged in a sequence of digitized video frames (14), neighboring frames being separated by a synchronization signal (16). A sensing circuitry (30) monitors the synchronization signals and detects absent synchronization signals. A clock generator (32) generates a replacement synchronization signal...

20060104369 - Moving image coding apparatus and decoding apparatus: A moving image coding apparatus which has coders (17, 18, 19) for dividing an input moving image signal into a plurality of frames, dividing each of the frames into one or more image areas, compressing and coding the image areas, and outputting an area image code string, a system multiplexer...

20060104368 - Video signal multiplexer, video signal multiplexing method, and picture reproducer: An embodiment of the present invention provides a video signal multiplexing apparatus including a separator separating picture information and additional information from a received video signal, a controller adjusting, if the picture information is out of sync with the additional information, a data amount of the additional information based on...

20060104370 - Communications device, communications method, communications program, storage medium storing the communications program, and communications system: A transmitting device includes: (i) an encoding rate managing section which controls an encoding rate of an encoding rate altering section which alters the encoding rate; (ii) an error resilience managing section which controls error resilience of an error resilience adding section; and a channel conditions measurement section which measures...

20060104371 - Method for transmitting data on a bus: A method for transmitting data blocks from a data source to a data sink on a bus, which supports the transmission of frames having a variable and limited number n of data elements, has the following steps: a) transmitting, from the data sink to the data source, control information which...

20060104372 - Coding system: The present invention relates to a coding strategy for joint modulation coding and ECC coding. It relates in particular to the situation where 2D coding is performed along one-dimensionally evolving strips containing a number of bit rows in the radial direction of the strip, which is orthogonal to the former...

20060104374 - Mapping strategy for ofdm-based systems using h-arq: A wireless communication device adapted so that, in response to a repeat request indicating a communication signal, the device wirelessly retransmits the communication signal using a remapping of bits into at least partially different frequencies in the retransmission compared to the original transmission....

20060104375 - Method and system for improving the quality of a radio signal: The invention relates to a method and a system for improving the quality of a radio signal, particularly for systems according to the IEEE 802.16 standard. In the case of a wireless transmission of radio signals the signals often doesn't reach the receiver in a direct way, but are scattered...

20060104373 - Ofdm peak-to-average power ratio reduction by combined symbol rotation and inversion with limited complexity: A signal scrambling method based on combined symbol rotation and inversion (CSRI) for the peak-to-average power ratio (PAPR) reduction of OFDM signals. By dividing OFDM sequences into subblocks and performing symbol rotation and inversion in each subblock, high degrees of freedom are available to offset the possibility of encounting poor...

20060104376 - Ofdm signal receiver and receiving method: A receiver having a frequency-deviation detector which includes: a storage for locating and storing the frequency-domain symbol-signal in a two-dimensional data area on a two-dimensional space corresponding to a carrier frequency and a symbol time; a calculator for calculating the transfer characteristic of a pilot signal; a Fourier transformer for...

20060104378 - Method and system for computing log-likelihood ratios for coded quadrature amplitude modulated signals: According to an embodiment of the invention, a method and system is disclosed for determining log-likelihood ratios for a coded set of individual bits (40) of a quadrature amplitude modulation (QAM) codeword. In the method at most two constant values (33,35) may be determined to perform a set of predetermined...

20060104377 - Multiple output multicarrier transmitter and methods for spatial interleaving a plurality of spatial streams: A multicarrier transmitter performs bit-interleaving suitable for transmitting more than one spatial stream over a multicarrier communication channel. The multicarrier transmitter may include a bit-grouping shifter to shift QAM symbol-bit groupings of a spatial stream among subcarriers of the multicarrier communication signal, and a bit-position permuter to rotate bits among...

20060104381 - Beam-steering and beam-forming for wideband mimo/miso systems: Techniques to perform beam-steering and beam-forming to transmit data on a single eigenmode in a wideband multiple-input channel. In one method, a steering vector is obtained for each of a number of subbands. Depending on how the steering vectors are defined, beam-steering or beam-forming can be achieved for each subband....

20060104382 - Method and apparatus for transmitting/receiving signals in multiple input multiple output wireless communication system employing beam forming scheme: Disclosed is a method and an apparatus for transmitting/receiving signals in an multiple input multiple output (MIMO) wireless communication system. The method and apparatus including beam forming of a reference signal while predetermined codes are mapped on a one-to-one basis to each of a plurality of beams available for the...

20060104379 - Technique to increase a code rate in a mimo system using virtual channels: Various techniques and embodiments are described to increase a code rate in a MIMO system using one or more virtual channels....

20060104380 - Time-switched preamble generation to enhance channel estimation signal-to-noise ratio in mimo communication systems: The present invention provides a channel estimate enhancer for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas, where N is at least two. In one embodiment, the channel estimate enhancer includes a first preamble generator that produces a basic preamble configured to provide gain training and channel...

20060104383 - Radio transmitter incorporating digital modulator and circuitry to accommodate baseband processor with analog interface: A radio frequency (RF) transmitter includes a digital radio processor and a baseband processor. A complex analog-to-digital converter (ADC) within the radio processor provides an analog interface to the baseband processor to receive an analog complex modulated baseband signal and convert the analog complex modulated baseband signal to a digital...

20060104384 - Systems and methods for vector power amplification: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency,...

20060104385 - Systems with increased information rates using embedded sample modulation and predistortion equalization implemented on metallic lines: In these systems overlapping symbols are transmitted in one symbol time. The basic symbol, termed a half dipulse, is shaped so that a subset of samples, termed the embedded samples, has an inverse. This inverse is used at the receiver to remove the intersymbol interference amongst overlapping symbols. A symbol...

20060104386 - Quadrature voltage controlled oscillator for global positioning system frequencies: A quadrature voltage controlled oscillator that generates both in-phase and quadrature signals. The in-phase signal is generated by directly coupling two oscillators, while the quadrature phase signal is generated by cross-coupling the two oscillators....

20060104388 - Burst detection apparatus and method for radio frequency receivers: The present invention discloses a burst detection apparatus and method. The burst detection apparatus of the present invention comprises a power module, a soft-metric RMS module, and a quality determination module. The bust detection method comprises the following steps: At first, a reciprocal value of the received signal's power is...

20060104389 - Configurable all-digital coherent demodulator system for spread spectrum applications: A configurable all-digital coherent demodulator system for spread spectrum digital communications is disclosed herein. The demodulator system includes an extended and long-code demodulator (ELCD) coupled to a traffic channel demodulator (TCD) and a parameter estimator (PE). The demodulator also includes a pilot assisted correction device (PACD) that is coupled to...

20060104387 - Method for estimating time of arrival of received signals for ultra wide band impulse radio systems: A method estimates a time of arrival of a signal received in a wireless communication system. An energy in a frame of a received signal is measured to determine a block in the frame, the block representing a coarse time of arrival of the received signal. Multiple time-delayed versions of...

20060104391 - Enhanced vsb viterbi decoder: An enhanced VSB receiver includes a tuner which tunes an RF signal and converts it into an IF signal, an IF mixer which converts the IF signal into a baseband signal, and a demodulator which demodulates the baseband signal signal into a VSB signal. The enhanced VSB receiver further includes...

20060104390 - Reduced-complexity multiple-input, multiple-output detection: A wireless receiver detects signals generated with a multiple-input, multiple-output (MIMO) transmitter. The receiver applies maximum-likelihood detection (MLD) for soft-output signal detection, where an MLD exhaustive search across all candidate vectors is performed recursively by computing and accumulating the differences between, for example, the Euclidean metrics of consecutive candidate tests....

20060104392 - Method and system for terc4 decoding using minimum distance rule in high definition multimedia interface (hdmi) specifications: Certain embodiments of the invention provide a method and system for TERC4 decoding using minimum distance rule. A plurality of bits may be received that may indicate addresses of samples of data. A lookup table may be generated based on the received plurality of bits to determine corresponding output samples...

20060104393 - Apparatus and method of detection for a packet-based wireless receiver employing multiple, concurrent transmitted streams: The present invention provides a packet detector for use with a packet-based wireless receiver employing a receive antenna for P concurrently transmitted streams, where P is at least two. In one embodiment, the packet detector includes a correlation unit coupled to the single receive antenna and configured to provide a...

20060104394 - Method and apparatus for precise open loop tuning of reference frequency within a wireless device: A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when...

20060104395 - Nonlinear inversion: A system and method are disclosed for processing a signal propagated through a nonlinear channel. The method includes modeling the channel characteristics to produce a linearized channel model, deriving an inverse linearized channel model from the linearized channel model, and filtering the signal using the inverse linearized channel model....

20060104396 - Serial bus system: A serial bus system for data communication between devices according to a master-slave protocol has a data bus connecting master and slave devices and a shared clock system arranged to provide a shared-clock signal to the master and slave devices. The master and slave devices are arranged to derive device-individual...

20060104397 - System and method for clock drift correction for broadcast audio/video streaming: A clock rate used in rendering broadcast streaming audio/video data is adjusted to converge on a clock rate associated with broadcasting the streaming data. The clock rate is adjusted by monitoring the buffer depth associated with a receive buffer that stores the incoming streaming data. The buffer depth provides an...

20060104399 - Clock and data recovery apparatus: A clock and data recovery apparatus reduces current consumption and enables easy integration. The inventive apparatus includes a first loop including a frequency/phase detection unit, a first charge pump unit, a multiplexing unit, a filtering unit, and a voltage controlled oscillator unit operating at a speed ¼ as fast as...

20060104398 - Frequency synthesizing device with automatic calibration: A frequency synthesizer with automatic calibration includes a voltage-controlled oscillator, which has several working bands for receiving a coarse-tuned signal and a fine-tuned signal and generating an output signal in the working band of the coarse-tuned signals; preliminary frequency divider unit, which receives the output signal and generates an intermediate...

20060098714 - Spread spectrum clock generator and method for generating a spread spectrum clock signal: A spread spectrum clock generator (SSCG) and method of generating a spread spectrum clock (SSC) signal, in which the SSCG may include a controller outputting a given modulation voltage signal based on a difference between an average frequency of a first feedback signal and a comparison frequency signal input thereto,...

20060098713 - Ultra wideband receiver architecture using high order gaussian pulses and method of operation: An ultra wideband (UWB) receiver system operable to process a high order Gaussian pulse includes an integrator group, a correlator circuit and a comparator circuit. The integrator group includes an input coupled to receive the high order Gaussian pulse and an output coupled to the correlator circuit, the integrator group...

20060098715 - Method of detecting interference in a frequency hopping wireless communication system: An adaptive frequency hopping wireless communication method in which, upon completion of the transmission of a packet from a transmitting device to a receiving device in a time slot, the transmitting or receiving device (or both) uses the remaining time in the slot, if the amount of remaining time is...

20060098716 - Method and apparatus for estimating and correcting baseband frequency error in a receiver: A method and apparatus for estimating and correcting baseband frequency error in a receiver. In one embodiment, an equalizer performs equalization on a sample data stream and generates filter tap values based on the equalization. An estimated frequency error signal is generated based on at least one of the filter...

20060098718 - Method and apparatus for maximizing standby time in remote stations configured to receive broadcast databurst messages: A wireless telecommunications system includes a base station, a plurality of remote stations, a first channel for general page messages containing paging information and broadcast databurst message references, and an auxiliary channel for broadcast databurst notification indicators for the purpose of increasing standby time in remote stations configured to receive...

20060098717 - Method and apparatus for reducing the processing rate of a chip-level equalization receiver: A method and apparatus for reducing the processing rate when performing chip-level equalization (CLE) in a code division multiple access (CDMA) receiver which includes an equalizer filter. Signals received by at least one antenna of the receiver are sampled at M times the chip rate. Each sample stream is split...

20060098719 - Adaptive code-tracking receiver for direct-sequence code-division multiple access (cdma) communications over multipath fading channels and method for signal processing in a rake receiver: In one embodiment, a rake receiver for a spread-spectrum (SS) signal has a plurality of rake fingers corresponding to different multipath components of the SS signal and sampling circuitry generating a stream of samples corresponding to the SS signal. A first rake finger has a detection path detecting symbols based...

20060098720 - Antenna array communication using spreading codes: A first reference signal and a first data signal are transmitted from a first antenna of a base station and a second reference signal and a second data signal are transmitted from a second antenna of the base station. The first and second antennas are difference antennas. The first and...

20060098721 - Method and apparatus for receiving gps/glonass signals: A method of processing received L1 and L2 spread spectrum signals is disclosed. In one embodiment, the method comprises i) locally generating replicas of a known P-code, wherein each of the received signals includes a unique frequency carrier with the known pseudo-random P-code and an unknown code modulated thereon, ii)...

20060098722 - Repeating installation, communication speed adjusting method, program, and recording medium: A repeating installation includes transmission speed detection units which detect respective transmission speeds of a plurality of transmission lines connected to a plurality of communication apparatuses, a transmission speed determination unit which determines the slowest transmission speed among the detected transmission speeds of respective transmission lines as a reference transmission...

20060098723 - Frequency agile transceiver for use in a multi-band handheld communications device: A multi-band handheld communications device includes a transceiver including a transmitter having a transmit filter and a receiver having a receive filter, each of the transmit and receive filters having a bandpass region tunable across multiple bands, and a processor configured to select one of the multiple bands to operate...

20060098724 - Systems and methods for multicarrier transceiver with radio frequency interference reduction: A multi-carrier information transceiver that exhibits robustness against radio frequency interference (RFI) signals present in the communications channel. The transceiver includes a RFI mitigation technique that operates not only during the steady state operation of the transceiver but also during the training stage of the transceiver. That requires dynamically modifying...

20060098725 - Dsl system estimation including known dsl line scanning and bad splice detection capability: Estimates of a communication system configuration, such as a DSL system, are based on operational data collected from a network element management system, protocol, users and/or the like. The operational data collected from the system can include performance-characterizing operational data that typically is available in an ADSL system via element-management-system...

20060098726 - Pilot-directed and pilot/data-directed equalizers: A normalized least means square (NLMS) equalizer including two equalizer filters is disclosed. In one embodiment, a single correction term generator is used to generate correction terms for tap coefficient updates of each of the equalizer filters based on a pilot signal. In another embodiment, two different correction term generators...

20060098727 - Adaptive equalizer: The present invention is related to an adaptive equalizer comprising: an equalizer filter (32) for filtering a distorted signal from a communication channel, having a data input (30) for receiving said distorted signal, a feedback signal input for a feedback control signal, and which generates an output signal at an...

20060098728 - Decision feedback equalizer for digital tv and method thereof: The conventional decision feedback equalizer has a drawback that can't decide symbols correctly because a simple slicer is used as a symbol detector. A decision feedback equalizer as a symbol detector uses a Trellis Coded Modulation (TCM) decoder whose Trace Back depth is 1 (TBD=1), to thereby decide symbols correctly...

20060098729 - Smart image processing cctv camera device and method for operating same: A smart image processing CCTV camera device and a method for operating the same are proposed. The camera can process, compress and store digital images, and zoom to a captured image using a digital image-capturing component therein. It can also restore the captured image to either an analog or a...

20060098730 - Video codec: A video codec is composed of: a video encode/decode operation unit which decodes a bitstream into a video signal; an IO buffer into which the bitstream transferred from an encoded-video recorder is stored; and a DMAC which controls a process of determining, in accordance with free space of the IO...

20060098734 - Apparatus, medium, and method for processing neighbor information in video decoding: Provided is an apparatus, medium, and method for processing neighbor information in a video decoder that can minimize the number of memory accesses. The apparatus includes a neighbor information providing unit and a storage unit. If at least one spatially neighboring block of a current block exists in memory, the...

20060098732 - Method and corresponding device for block coding data: The method for block coding data, such as video data, via a compression operation includes applying to input-data blocks a discrete-cosine-transform (DCT) operation and a quantization operation to produce compressed-data blocks. The compressed-data blocks are subjected to a coding operation to obtain compressed output flows; and an inverse-quantization operation and...

20060098733 - Variable-length coding device and method of the same: It is an object to improve coding efficiency by suitably setting, with respect to input information in moving image coding, a parameter for quantization calculation at the time of quantization. Various parameters for quantization calculation are set by a parameter setter 103, quantization is performed with the set parameters for...

20060098731 - Digital video data transmission system and method: Provided are a digital video data transmission system and digital video data transmission method. The digital video data transmission system includes a transmitting unit transmitting valid first data in input digital video data having spatial locality to a bus as output encoding information without bit-inversion coding the first data, bit-inversion...

20060098735 - Apparatus for motion estimation using a two-dimensional processing element array and method therefor: An apparatus for motion estimation and method therefor are provided. The apparatus includes a processing element (PE) array unit that includes a delay unit array and a PE array. The delay unit array outputs different data flows of current data to the PE array with respect to checking points in...

20060098736 - Method for performing motion estimation in video encoding, a video encoding system and a video encoding device: A current video block of a frame to be encoded comprises a set of first data values, and at least one other video block of another frame comprises a set of second data values. Data value pairs are formed of data values from said set of first data values and...

20060098740 - Motion estimation method using adaptive mode decision: A motion estimation method using adaptive mode decision is disclosed. The method includes a motion vector difference value calculation step of calculating a motion vector difference value using an input motion vector estimation value x component for a current block and an input x offset corresponding to a current SAD....

20060098737 - Segment-based motion estimation: A method to determine motion vectors for respective segments (S11-S14) of a segmented image (100) comprises: creating sets of candidate motion vectors for the respective segments (S11-S14); dividing the segmented image (100) into a grid of blocks (b11-b88) of pixels; determining for the blocks (b11-b88) of pixels which of the...

20060098738 - Video encoding methods and devices: A dual, and possibly multiple, frame approach is used by the invention. Embodiments of the invention include making a decision to use a long term reference frame, which is a frame other than an immediate past reference frame, to conduct INTER coding, or to conduct INTRA frame coding. Other embodiments...

20060098739 - Video frame encoder driven by repeat decisions: A method for encoding video, comprising the steps of: (A) detecting repeated fields in a video sequence and (B) determining a distance between reference frames based upon detection of the repeated fields....

20060098741 - Reproducing apparatus: A communications unit carries out communications with server via network. A buffer memory temporarily stores the data which the communications unit downloads from the server via the network. A decoding unit decodes the data read from the buffer memory. A control unit individually sets reproduction start threshold ths used to...

20060098743 - Image display apparatus: An image display apparatus is provided for receiving a digital image signal and displaying it so that high-quality images can be displayed with the noise reduced not to be conspicuous and with the contour appropriately corrected. The image display apparatus includes an input unit to which the digital image signal...

20060098742 - Method of automatically testing audio-video synchronization: A method of testing audio/video synchronization comprising calculating a frequency of a device used to encode a digital stream based on program clock references calculating first time differences between audio decoding time stamps and actual audio decoding times; calculating second time differences between audio presentation time stamps and actual audio...

20060098744 - Video deblocking filter: Deblocking filters are disclosed, where the nature of the filter is determined based upon the level of detail of a reconstructed video frame in the region in which the block boundary is located. One embodiment of the method of the invention includes identifying a boundary between two blocks of the...

20060098745 - Apparatus and method for evaluating data transmission: The present invention discloses an apparatus for evaluating a transmission quality of data display system and its related method. The method comprises: mixing at least one pattern in a first signal of an image signal to produce a mixed signal in the transmitter, wherein said pattern is known to said...

20060098746 - Multi-channel time-reversal receivers for multi and 1-bit implementations: A communication system for transmitting a signal through a channel medium comprising digitizing the signal, time-reversing the digitized signal, and transmitting the signal through the channel medium. In one embodiment a transmitter is adapted to transmit the signal, a multiplicity of receivers are adapted to receive the signal, a digitizer...

20060098749 - Apparatus and method for detecting ranging signal in an orthogonal frequency division multiple access mobile communication system: An apparatus and method for receiving a ranging signal in an OFDMA mobile communication system are provided. The ranging signal receiving apparatus including, a ranging subchannel extractor for extracting subcarrier values with a ranging signal from a (FFT) signal; a plurality of multipliers for code-demodulating the sub-carrier values by multiplying...

20060098752 - Apparatus and method for transmitting a preamble and searching a cell in an ofdma system: An apparatus and method for generating a preamble and searching a cell using the generated preamble in an orthogonal frequency division multiple access (OFDMA) system. Q cyclic shift values and P pseudo-random noise (PN) codes are used to distinguish N cells. One of the P PN codes is cyclically shifted...

20060098750 - Circuit and method for reducing impulse noise: A circuit and method for reducing impulse noise. The circuit may include a noise measuring unit which determines whether a first logic level or a delayed version of a received signal sample will be output based on a comparison of absolute values of a plurality of delayed versions of the...

20060098747 - Coded ofdm system and method with improved papr reduction: A system and method is herein disclosed for reducing peak-to-average power ratio in an orthogonal frequency division multiplexing system which utilizes label bits inserted at predetermined locations of an information stream prior to encoding....

20060098751 - Methods of automatically detecting spectrum inversion and related terrestrial digital video broadcasting receivers: DVB-T receivers and methods may provide automatic detection of spectrum inversion using continual pilot correlation. A DVB-T receiver may include a demodulator, a fast Fourier transformation (FFT) unit, and a spectrum inversion detector. The demodulator may demodulate a received DVB-T digital signal according to a spectrum inversion signal, and the...

20060098748 - Multi-carrier communication system and communication method thereof: A multi-carrier communication system is disclosed. The multi-carrier communication system includes a transmitting module for generating a first time-domain signal by performing an inversed Fourier transform upon a transmitting data; a receiving module for receiving a second time-domain signal and for generating a decoded data by performing a Fourier transform...

20060098753 - Continuous phase modulation system and method with added phase pulse: A signal generator generates a coded or memory waveform having a trellis structure. A modulator is operative with the signal generator for adding at least one phase pulse to the trellis structure of the coded or memory waveform to create a substantially constant envelope modulated signal that increases the transmitted...

20060098754 - Beam and power allocation method for mimo communication system: A beam and power allocation method for a MIMO system transmitting multiple data streams from a transmitter having a plurality of transmit antennas to a receiver having at least two receive antennas, the transmit antennas being grouped based on feedback information from the receiver, includes obtaining covariance matrices for respective...

20060098755 - Systems and methods for high-efficiency transmission of information through narrowband channels: Systems and methods for transmitting information at very high data rates through narrowband communication channels are provided. The systems and methods involve modulating a message signal with a novel return-to-zero, abrupt phase modulation technique and filtering the modulated signal with a sophisticated high-precision digital filter. The digital filter is designed...

20060098756 - Systems and methods for designing a high-precision narrowband digital filter for use in a communications system with high spectral efficiency: Systems and methods for transmitting information at very high data rates through narrowband communication channels are provided. The systems and methods involve modulating a message signal with a novel return-to-zero, abrupt phase modulation technique and filtering the modulated signal with a sophisticated high-precision digital filter. The digital filter is designed...

20060098757 - Device and method for presdistoring and input signal: A device, comprising a storage means (51) for storing phase change values, and a phase offset adding means (50) for predistorting an input signal at an amplifier means is disclosed. A controller means (52) is connected to the storage means (52) and the phase offset adding means (50). Said controller...

20060098759 - Method and apparatus for performing fast power control in a mobile communication system: A method and apparatus for controlling transmission power in a mobile communication system is disclosed. The method disclosed provides for a closed-loop power control method for variable rate transmissions. The power of transmissions is varied in accordance with the rate of the frames of data being transmitted. The transmission power...

20060098758 - System and method for forward path gain control in a digital predistortion linearized transmitter: A system and method for controlling the gain in the forward signal path of a digital predistortion linearizer is disclosed. The loop gain of the predistortion system is driven to unity, where a separately controlled constant-gain observation path allows accurate gain control of the forward path. This is divided into...

20060098760 - Method of maximizing mimo system performance by joint optimization of diversity and spatial multiplexing: A method of transmission in a wireless communication system having a transmitter and a receiver. In the transmitter: signals are encoded using a space-domain precoder for spatial multiplexing, time-domain variable delay is introduced at each signal communication path for time diversity, and the signal are transmitted to the receiver. In...

20060098761 - Multi-mode transmitter: A radio frequency module (500) that uses reconfigurable and reprogrammable hardware to generate and condition RF signals that have one of several selectable modulation formats. A modulation controller (316) selects a selected modulation format from a plurality of modulation formats and a signal generator (408) that is capable of generating...

20060098762 - Driver circuit for driving a power amplifier: A circuit for providing AM/PM modulation is described. The circuit includes a signal generator, which provides two phase modulated (PM) signals used to form two drive signals which are later combined in a constructive/destructive fashion. The combination of the two phase modulated signals form a signal for driving a load....

20060098763 - Device for estimating a timing correction loop error for a digital demodulator: A device for providing a digital error signal, for a timing correction loop of a digital demodulator for digital transmission by phase modulation or amplitude and phase modulation, the device successively receiving pairs of digital signals representative of the components of complex signals, and having circuitry for providing a difference...

20060098765 - Interference cancellation in rfid systems: An interference canceller for a RFID reader senses a signal related to the interference signal in the receive path of the reader. The canceller outputs an adjustment signal that depends on the sensed signal, which is coupled into the receive path before a downconverter in the receive path. The canceller...

20060098766 - Method and apparatus for estimating the step-size of an adaptive equalizer: A step-size estimator for controlling the step-size of an adaptive equalizer incorporated in a transceiver, (e.g., a wireless transmit/receive unit (WTRU)). The step-size estimator updates at least one adaptive equalizer tap used by the adaptive equalizer based on an apparent speed of a channel established between the transceiver and another...

20060098764 - Method of protecting a frequency of a data stream from interference and circuit performing such a method: A method for mixed analog digital designs protecting the frequencies that are important for the analog part. The generated digital data stream has relatively large signal levels compared to the sensitive analog parts. The data bit stream is monitored and their frequency spectrum is corrected. The monitoring is performed by...

20060098768 - Polymerization of macrocyclic polyester oligomers using n-heterocyclic carbene catalysts: A method, system, and a computer usable program code for reducing the effects of intersymbol interference in a high speed data transmission using various steps. First, a training sequence is established between a transmitter operably connected by a conductor to a receiver. Data is analyzed at the receiver. Transition bits...

20060098767 - Wireless receiver with anti-jamming: An embodiment of the present invention provides a method for communicating data in the presence of jamming interference, comprising transmitting a first signal carrying the data from a transmitter to a receiver at a data transmission rate, determining at the receiver that the first signal has been corrupted by the...

20060098769 - Apparatus and method for controlling display state: In a display state control apparatus for automatically changing the frequency and the phase of a sampling clock signal according to changes in the phase and frequency of an input signal, and in a display state control method therefor, an optimal display state is maintained by automatically changing the frequency...

20060098770 - Synchronizer for passing data from a first system to a second system: A synchronizer for passing data from a first system that transmits data based on a first clock and a second clock, to a second system that receives data based on a third clock, includes a first set of flip-flops for receiving data from the first system based on the first...

20060098771 - Method and apparatus for a digital-to-phase converter: A DPC (300) includes: a frequency source (310) for generating a clock signal; a delay line (320) for receiving the clock signal and generating phase-shifted clock signals at output taps; a digital control device (330) for generating a control signal; and a windowing and selection circuit for generating the output...

20060093017 - Drive circuit for a switch in a switching converter: P

20060093018 - Method of preventing interference of signal transmission of electronic input device: A method of preventing interference of signal transmission of electronic input devices, using a receiving unit that has multiple frequency channels to connect a host. The receiving unit is accompanied with software program to set up one sequence of frequency-hopping channels for each type of electronic devices such as mouse,...

20060093019 - Rf band clock spur harmonic canceller: A network device for cancelling spurs without affecting an incoming signal. The network device includes an estimator for estimating amplitude and phase of a spur over a predetermined period of time. The network device also includes processing means for freezing further estimation of the amplitude and phase of the spur,...

20060093020 - Interference cancellation in a spread spectrum communication system: A code division multiple access communication system transmits a pilot and traffic signal over a shared spectrum. The pilot and traffic signal have an associated code and are received over the shared spectrum. The received signals are sampled and the samples are delayed to produce a window. A weighted value...

20060093021 - Code acquisition device and method using two-step search process in ds-cdma uwb modem: There is provided a code acquisition device and method using a two-step search process in a DS-CDMA UWB modem. The device includes: an I/Q channel symbol generating unit for, generating a plurality (i) of nth I/Q channel symbols in a first search process and generating a plurality of nth I/Q...

20060093022 - Data relay device, data relay method and data transmission system: A relay device employs a control system which notifies control data indicating its own specification to transmitting equipment to receive data in a form matching to its own specification and acquires control data D13 from receiving equipment employing the control system and connected to a latter stage. The relay device...

20060093023 - Multicarrier transceiver: A multicarrier transceiver is disclosed that includes a digital signal processor with a plurality of memory locations, a direct memory, an encoder module coupled to receive data from the FIFO buffers, a decoder module coupled to receive data from the FIFO buffers, a Fourier transform module configured to perform an...

20060093024 - Wireless communication method and apparatus for adaptively biasing channel quality indicators to maintain a desired block error rate: A method and apparatus for adaptively biasing a channel quality indicator (CQI) used for setting a configuration of communication between a transmitter and a receiver in a wireless communication system. The receiver sends a CQI and positive acknowledgement (ACK)/negative acknowledgement (NACK) messages to the transmitter. The ACK/NACK messages indicate the...

20060093025 - Network-unit comprising a modem for exchanging modem signals: Network-units (1) comprising modems (2) and agents (5) give their modems (2) a larger freedom by supplying a mask or a set of masks from the agent (5) to the modem (2), which mask or set of masks defines extreme parameter values such as extreme values of power spectral densities,...

20060093026 - Method and system for power control in a communication system: Apparatus and methods efficiently estimate signal-to-noise ratios of a received signal irrespective of intentional adjustments to transmitting power due to fluctuating data rates. For example, in one embodiment, the variation in power due to the change in data rate is decoupled from environmental sources for variations in power. In one...

20060093027 - Method of finding data dependent timing and voltage jitter for different bits in an arbitrary digital signal in accordance with selected surrounding bits: Separation and analysis of measured Total Jitter (TJ) begins with a suitably long arbitrary digital test pattern, from which an Acquisition Record is made. A Time Interval Error (TIE) or Voltage Level Error (VLE) Record is made of the Acquisition Record. A Template defines a collection of associated bit value...

20060093028 - Serial data link using decision feedback equalization: A multi-phase adaptive decision feedback equalizer minimizes post-cursor inter-symbol interference in a current data bit based on values of subsequent data bits in a data communication system. In one form, the receiver includes a plurality of modules each having a respective adaptive decision feedback equalizer. A processor responsive to output...

20060093029 - Apparatus and method for grey encoding modulated data: A method and apparatus for grey encoding modulated data are described. In one embodiment, the method includes encoding of an input data stream to form an encoded data stream according to a symbol alphabet. In one embodiment, a modulated signal is produced from the encoded data stream. In one embodiment,...

20060093031 - Method and apparatus for performing multiple description motion compensation using hybrid predictive codes: An improved multiple description coding (MDC) method and apparatus is provided which extends multi-description motion compensation (MDMC) by allowing for multi-frame prediction and is not limited to only I and P frames. Further, the coding method of the invention extends MDMC for use with any conventional predictive codec, such as,...

20060093030 - Method for compressing digital data of a video sequence comprising alternated shots: The process is characterized in that it comprises the following steps: segmentation of the sequence into alternating video shots, classification of these shots according to camera angles in order to obtain classes, construction of a sprite or video object plane for a class that is an image corresponding to the...

20060093033 - Image coding and decoding method and apparatus considering human visual characteristics: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest...

20060093034 - Image coding and decoding method and apparatus considering human visual characteristics: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest...

20060093035 - Image coding and decoding method and apparatus considering human visual characteristics: An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest...

20060093032 - Method and apparatus for encoding a moving-picture signal: A signal related to input moving pictures of plural different types is quantized in response to a variable quantization scale factor before being encoded. An actual complexity of each past encoded picture originating from one of the input moving pictures is calculated. A complexity of a next encoded picture is...

20060093036 - Method for encoding and decoding video signals: A method for encoding video signals by inverse motion compensated temporal filtering where video frames of a base layer are used to encode video frames of an enhanced layer into predicted images. For each image block in an arbitrary frame in an enhanced layer frame sequence, an area including a...

20060093037 - Device and method for decoding and digital broadcast receiving apparatus: To display a plurality of pictures with proper quality corresponding to a display size in the case of displaying a plurality of pictures on a screen. Resource assigning section 18 assigns a resource of decoding processing, such as inverse DCT processing or movement compensation/interframe predictive decoding processing, per a picture...

20060093038 - Encoding of video cross-fades using weighted prediction: A video encoder and method are provided for encoding video signal data for at least one cross-fade picture disposed between a fade-out start picture and a fade-in end picture, where the encoder portion includes a reference picture weighting factor unit for assigning weighting factors corresponding to each of the fade-out...

20060093040 - Method and system for extracting key frames from video using a triangle model of motion based on perceived motion energy: A key frame extraction system and method for extracting key frames from a video based on motion analysis of frames within the video. Key frames are highlight frames that are effective in summarizing a video sequence. This allows a user to quickly find a desired spot in a video is...

20060093039 - Video image encoding method and video image encoding apparatus: A video image encoding method includes: obtaining a first motion vector that indicates relevancy between an input image that is to be encoded and a locally decoded image that is decoded from an encoded image; generating a filter for the locally decoded image, the filter that minimizes an error between...

20060093041 - Intra-frame prediction for high-pass temporal-filtered frames in wavelet video coding: A method of encoding a sequence of frames using 3-D decomposition, the method comprising dividing the frames into blocks and coding the blocks, wherein coding a current block comprises evaluating at least one neighbouring block in the same frame and making a determination about whether to code data in the...

20060093042 - Coding apparatus, decoding apparatus, coding method and decoding method: A coding apparatus that can have a plurality of macro blocks processed concurrently according to a new standard such as the MPEG-4 Standard or the H. 264/MPEG-4AVC Standard. A coding apparatus for dividing a picture to form a matrix of blocks (macro blocks), each having a predetermined number of pixels,...

20060093043 - Coding apparatus, decoding apparatus, coding method and decoding method: A coding apparatus that can have a plurality of macro blocks processed concurrently according to a new standard such as the MPEG-4 Standard or the H. 264/MPEG-4AVC Standard. A coding apparatus for dividing a picture to form a matrix of blocks (macro blocks), each having a predetermined number of pixels,...

20060093045 - Method and apparatus for splicing: A method and apparatus for splicing programs in the MPEG domain, wherein program data is carried in MPEG transport streams (TS) of data packets. The data packets carry application data, e.g. video and audio data, and a header provided with control data. According to the invention control data objects are...

20060093044 - Scalable method and system for streaming high-resolution media: A system and method for distributing data (e.g., imaging data such as pixels, or 3D graphics data such as points, lines, or polygons) from a single or a small number of data sources to a plurality of graphical processing units (graphics processors) for processing and display is presented. The system...

20060093046 - Digital communication method and digital communication device: A digital communication device includes: a modulator having encoding means for converting two-dimensional digital information signal into a three-dimensional signal and phase modulation means for modifying the carrier phase in according to the three-dimensional signal; and a demodulator having phase demodulation means for detecting information on the three-dimensional signal from...

20060093047 - Circuit to reduce transient current swings during mode transitions of high frequency/high power chips: A method, an apparatus, and a computer program are provided to reduce transient current swings during mode transitions. Traditionally, transient supply voltage fluctuations on a chip account for a large portion of the power supply. The number of series inductances and resistances are typically minimized, while adding large decoupling capacitances...

20060093049 - Dual antenna communication methods and systems: A dual antenna transmitter includes a diversity encoding module that receives a data stream and provides a pair of encoded data streams selected to cause generation of overlapping symbols that provide substantially constant signal power to a receiver when the first and second antennas are unobstructed from the receiver. The...

20060093048 - Partial spectral loss concealment in transform codecs: The invention concerns a frequency-domain error concealment technique for information that is represented, on a frame-by-frame basis, by coding coefficients. The basic idea is to conceal an erroneous coding coefficient by exploiting coding coefficient correlation in both time and frequency. The technique is applicable to any information, such as audio,...

20060093052 - 2n-point and n-point fft/ifft dual mode processor: A 2N-point and N-point FFT/IFFT dual mode processor is provided. The processor includes a butterfly operator, the first and second MUXs, and the first and second N-point FFT processors. The butterfly operator receives 2N data and butterfly-operates on the received 2N data when receiving a control signal ‘0’ from the...

20060093051 - Method and device for resisting dc interference of an ofdm system: A method and device for resisting DC interference of an orthogonal frequency division multiplexing (OFDM) system are used to obtain interference of a DC source to an OFDM system corresponding to various modulation types and frequency offsets for producing a weighting look-up table when the OFDM makes simulation. Different weights...

20060093053 - Ofdm channel estimation in the presence of interference: Systems and methods for estimating channel response in the presence of interference. Interference and/or noise present on received training symbols is estimated. Based on the measured noise and/or interference, a weighting among training symbols is developed. Channel response is then estimated based on a weighted least squares procedure....

20060093050 - Symbol synchronization for communication: A communication system and method is disclosed that performs symbol boundary synchronization by generating a symbol alignment estimate from a partial signal correlation; and then refining the symbol alignment estimate via a carrier phase calculation. To generate the symbol alignment estimate, two methods are disclosed. After an estimate is determined,...

20060093054 - Method and apparatus for signal coding: A method and apparatus is disclosed for use in a communication system for encoding data to achieve more efficient coding rates and high data transmit rate, or a lower bit error rate. An encoder may receive a portion of the data to be encoded and process the portion of the...

20060093061 - Apparatus and method for transmitting and receiving data using space-time block coding: An space-time-frequency block coding (STFBC) apparatus for a transmitter with four Tx antennas is provided. An input symbol sequence is transmitted through the four Tx antennas in a predetermined method based on feedback information received from a receiver or a selected matrix with regularities, thereby improving the performance of an...

20060093062 - Apparatus and method for transmitting and receiving data using space-time block coding: An STFBC coding apparatus for a transmitter with four Tx antennas is provided. In the transmitter, an encoder generates a code symbol vector by encoding an input symbol sequence in a predetermined coding method. A grouping block permutes the elements of the code symbol vector by multiplying the code symbol...

20060093059 - Interleaver and de-interleaver systems: We describe an interleaver for a MIMO OFDM communications system having a plurality of transmit antennas, said interleaver being configured to interleave a block of N data bits comprising data for a plurality of OFDM symbols, each OFDM symbol being defined by a block of Ncbps bits, by implementing first...

20060093060 - Mimo system and method: There is provided a Multi-Input Multi-Output (MIMO) communication system including a transmitter for combining at least four transmit antennas according to each of at least two sub-channels, and transmitting space-time-coded signals and at least one receiver for receiving the signals through at least two antennas, wherein the receiver includes an...

20060093058 - Multiple list link adaptation: The present invention relates to link adaptation in wireless communication, and in particular though not exclusively to wireless local area networks (WLAN). The present invention provides a link adaptation system for communication systems using multiple but separate transmission parameter options. This equates to a “double list” approach compared with the...

20060093056 - Signal reception in mobile communication network: A receiver in a mobile communication network, including a receiving unit to receive signals transmitted in at least two channels, a channel estimator to form a channel estimate for each transmit channel, at least two linear filters, wherein each linear filter is configured to filter a signal received on a...

20060093057 - System and method for space-time-frequency coding in a multi-antenna transmission system: A method for space-time-frequency coding pieces of data includes receiving a stream of a plurality of pieces of data in a multi-antenna transmission system, where the data may comprise a stream of orthogonal frequency division multiple access (OFDMA) symbols, orthogonal frequency division multiplexed (OFDM) symbols or the like. The pieces...

20060093055 - Wireless communication method and apparatus for forming, steering and selectively receiving a sufficient number of usable beam paths in both azimuth and elevation: A wireless communication method of exploiting the radio frequency (RF) physical environment to establish a sufficient number of usable multiple paths of RF propagation for facilitating communications. The method is implemented in a wireless communication system including at least one transmitter and at least one receiver. The receiver's antenna is...

20060093063 - Method of preventing interferring signal transmission of electronic products: A method of preventing interference of signals transmitted from electronic input devices to a computer host. An identification is generated for each individual electronic device. A receiving unit is connected to the computer host. The identification frequencies are pre-stored in the receiving unit. The receiving unit performs scanning of signals...

20060093064 - Phase modulating and combining circuit: A transmitter includes a modulating and combining circuit to which signals are supplied and modulated into in-phase and quadrature-phase signals. The in-phase and quadrature-phase signals are combined in a closed-loop voltage summing circuit. The voltage summing circuit is an amplifier using capacitors as negative feedback elements. The negative feedback improves...

20060093066 - Apparatus and method for space-time-frequency block coding: A transmitter for maximizing coding gain by transmitting an input symbol sequence through a plurality of transmit antennas method according to feedback CQIs from a receiver in a 3 Tx-rate 2 communication system. In the transmitter, an S/P converter converts serial modulated data to parallel modulated data. A coder mode...

20060093065 - Method and apparatus for closed loop data transmission: A method for communicating a plurality of data streams between a transmitting device with multiple transmit antennas and a receiving device, is disclosed. The method comprises determining a set of power weightings, efficiently quantizing the power weightings, and providing the set of power weightings the transmitting device. Another aspect of...

20060093067 - Multiplexing of real time services and non-real time services for ofdm systems: Transmitter and receiver units for use in an OFDM communications system and configurable to support multiple types of services. The transmitter unit includes one or more encoders, a symbol mapping element, and a modulator. Each encoder receives and codes a respective channel data stream to generate a corresponding coded data...

20060093068 - Dc wander canceling device and method: A DC wander canceling device is provided for canceling DC wander. The DC wander canceling device comprises an analog front end, an equalizer, a slicer, and a digital/analog DC wander canceller. The digital/analog DC wander canceller is coupled to the slicer and the analog front end for receiving a sliced...

20060093069 - Method and system for sharing gm stage for a second if mixer using a polyphase clock to reduce current consumption and improve matching: A method for improving signal quality in a receiver is provided. The method may comprise generating a plurality of output signals from a single I component Gm stage and a single Q component Gm stage. The generated plurality of output signals may be mirrored from said I component Gm stage...

20060093070 - Method and system for reuse of cordic in an rf transceiver by reconfiguration in real time: Methods and systems for processing an RF signal are disclosed herein. Aspects of the method may comprise utilizing a single input CORDIC and a single output CORDIC for synchronizing and demodulating a received signal, wherein the received signal may comprise one or more bit rates. The received signal may comprise...

20060093071 - Blind detection of bpsk signals in a multi-user environment: The present invention relates to a system and method for the blind detection of BPSK signals in a multi-user environment. More particularly, the present invention provides a system and a method for blind detection of BPSK signals in an environment with multiple simultaneous transmitters. The received signal is a composite...

20060093072 - Method and system for process, voltage, and temperature (pvt) correction: Certain embodiments of the invention may be found in a method and system for process, voltage, and temperature (PVT) correction. The method may comprise first determining an input voltage of a transistor coupled in an inphase (I) path of a receiver and an input voltage of a transistor coupled in...

20060093073 - Signal receiver: A signal receiver includes a sampling device for sampling a received signal carrying a stream of symbols to form a first set of actual samples. The signal receiver also includes interpolation means for interpolating between the samples of the first set to form a second set of interpolated samples. The...

20060093074 - Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system: An apparatus and method are provided for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system based on Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA). In the communication system, all base stations boost a power level for a preamble or pilot by B dB. Accordingly,...

20060093075 - Whitening of data-dependent, non-stationary noise in an inter-symbol interference channel detector: A decoder includes cascaded lattice filters that receive encoded data and include adaptive inputs and output taps. A tap control couples a selected output tap to a viterbi input as a function of a viterbi output. A noise adaptation circuit provides adjustment to the adaptive inputs as a function of...

20060093076 - Apparatus for estimating a frequency offset in a communication system and method thereof: An apparatus and method for estimating a frequency offset using a preamble signal having a periodically repeated structure. According to the apparatus and method, the sum of or the difference between an input signal and a delay signal is calculated without obtaining a simple correlation value between the input signal...

20060093078 - Preamble aided synchronization: The repetitive structure of a preamble signal is exploited to enhance timing synchronization performance and frame start detection performance under adverse channel conditions. Received values are cross-correlated in time against a known noise-free version of the preamble. The presence of peaks in the cross-correlation output indicates presence of a frame....

20060093077 - Synchronizing method for impulse radio network: A method to synchronize impulse radio signal in a receiver based on a cross-correlation between an input signal and a template pulse train is described. The method comprises the steps of receiving a radio signal, performing a correlation between the acquired radio signal and a template pulse train, splitting the...

20060093079 - Method and system for adjusting dc offset slice point in an rf receiver: A method for adjusting a DC offset slice point in an RF receiver is provided and may comprise estimating DC offset using a combination of fast tracking of an input signal and slow tracking of an input signal. If both are used, the fast tracking may be executed prior to...

20060093080 - Diversity receiver having cross coupled channel parameter estimation: A diversity receiver has multiple antenna receiving branches. Each branch has means for estimating at least a receiving channel parameter, and the channel parameter estimating means in one branch are coupled to the channel parameter estimating means in an other branch. This way at least a part of the channel...

20060093081 - Method and system for packet synchronization: A method and system for packet synchronization may comprise receiving a plurality of bits from an incoming sample of data. The received plurality of bits may be sliced at a first sampling rate. A logic level of at least one of the received plurality of bits may be determined based...