Pulse or digital communications inventions 04/06

20060088080 - Low-interference uwb wireless communication system and processing method thereof and storage medium recorded program of the same: The proposed invention relates to the interference-free Ultra-Wide Band (UWB) wireless communication system using spreading codes with low correlation duration or Zero Correlation Duration (ZCD) property, the communication processing technique of the system and the record media of the program through the computer....

20060088082 - Method and system for fast acquisition of ultra-wideband signals: A system and method are provided that can detect any part of a multipath impulse radio signal. More specifically, the method compares a template pulse train and the multipath impulse radio signal to obtain a comparison result. The system performs a threshold check on the comparison result. If the comparison...

20060088081 - Transmit-rake apparatus in communication systems and associated methods: A transmit-rake apparatus includes at least one pulse generator that provides a plurality of pulses with selected signal properties so as to improve the signal-to-noise ratio at a receiver. The signal properties may include pulse timing, amplitude, polarity, and pulse shape. The transmit-rake apparatus may use a multipath analyzer, receive...

20060088083 - Phase cycling method in ssfp pulse sequence and magnetic resonance imaging apparatus: In order to positively decrease the band artifact on the middle of image when the field ununiformity is relatively fair and Nex is small, the present invention provides a phase cycling method for use in SSFP pulse sequence of a gradient echo system for rolling back the phase shift of...

20060088084 - Method and arrangement for channel simulation: A method and arrangement for simulating a radio channel. In the solution, a channel having paths is simulated and the delay of each path is formed separately with a low-resolution delay arrangement and a high-resolution delay arrangement in such a manner that the simulated delay of each path is the...

20060088087 - Adaptive equalizer with passive and active stages: An equalizer may use a passive input stage to improve linearity and reduce power consumption. In addition, the equalizer may use two gain circuits, one in a high frequency amplification path and the other in an all-pass path. The relative proportion of all-pass to high frequency amplification may be adjusted...

20060088085 - Method and system for equalization of a replacement load: A system (10) and method (50) of equalizing an audio signal from a factory installed radio (30) using an interface unit (10) between the factory installed radio and a replacement load (34) can include the steps of measuring (52) an existing equalization for the factory installed radio in the interface...

20060088086 - Reverse scaling for improved bandwidth in equalizers: An equalizer may use reverse scaling of physical dimensions between a plurality of equalizer stages to improve overall bandwidth. The equalizer may provide 20 dB of peaking at 5 GHz with good linearity and little noise accumulation, using CMOS technology....

20060088089 - Adaptive equalizer with dual loop adaptation mechanism: An adaptive equalizer may use dual loop adaptation to improve the performance of the equalizer. The first feedback loop may generate a boost control signal, based on the signal input to and output from a slicer. A second feedback loop may correct the swing amplitude of the slicer, so that...

20060088088 - Look-ahead equalizer and method for determining output of look-ahead equalizer: A look-ahead equalizer is provided. The equalizer has an equalizer without a first tap, a look-ahead unit, and a slicer unit. The equalizer without a first tap outputs a pre-filter output and a state reference signal. The look-ahead unit is coupled to the output of the equalizer without a first...

20060088090 - Dfe to ffe equalization coefficient conversion process for docsis 2.0: A method and appartus for converting FFE and FBE coefficients from a DOCSIS compatible cable modem termination system upstream equalizer into FFE only coefficients to be sent down to the cable modem which transmitted the training burst which resulted in convergence on the FFE and FFE coefficients. The method involves...

20060088091 - Equalizer with overlapped filter banks and methods for the same: An equalizer, which may reduce signal distortions using overlapped filter banks and methods for the same are provided. The equalizer may include a filter circuit, and a filter control circuit. The equalizer and methods for the same may reduce distortions in filtered signals....

20060088092 - Method and apparatus of controlling a plurality of video surveillance cameras: An apparatus, a method, and a software product to control a plurality of surveillance video camera/encoder combinations. The method includes receiving a plurality of encoded video streams from a respective surveillance camera/encoder combination, and accepting a measure of the level of activity for each encoded video stream. Each measure is...

20060088093 - Packet loss compensation: The invention relates to enabling a compensation of packet losses in a packet based transmission of data frames, wherein packets provided for transmission include a first type of frames corresponding to a respective data frame encoded using a first bit rate coding mode and a second type of frames corresponding...

20060088094 - Rate adaptive video coding: A method of encoding a sequence of frames for transmission comprises encoding a sequence of frames under different conditions to produce a plurality of encoded bit streams each representing the sequence of frames, for transmission at different bit rates, and storing each of the encoded bit streams in a respective...

20060088095 - Image-encoding controlling apparatus for using a table reflecting statistical frequency of quantization parameter selection and method thereof: An image-encoding method and apparatus is provided for using a table statistically reflecting a selection frequency of a quantization parameter. The method includes the steps of preparing a table representing a relationship among a target bit quantity, a quantization parameter and a selection frequency as a table for statistically reflecting...

20060088098 - Method and arrangement for reducing the volume or rate of an encoded digital video bitstream: A method and arrangement are presented for reducing the volume or rate of an encoded digital video bitstream that fulfils a certain set of predefined structural rules. The encoded digital video bitstream is partly decoded (704), thus producing a partly decoded digital video bitstream. The amount of bits in the...

20060088097 - Moving picture encoding apparatus having increased encoding speed and method thereof: Provided are a moving picture encoding apparatus having an increased encoding speed, and a method thereof, where the moving picture encoding apparatus includes a first frame memory storing an input image divided into brightness blocks of current macroblocks, each stored in one page; a second frame memory storing a previous...

20060088096 - Video coding method and apparatus: A method and apparatus are provided for improving compression efficiency or picture quality by selecting a wavelet transform technique suitable to input video/image scene characteristics in video/image compression. The video encoder includes a temporal transform module that removes temporal redundancy of an input frame and generates a residual frame, a...

20060088099 - Bit-rate control method and device combined with rate-distortion optimization: In the invention, a rate distortion optimization (RDO) based rate control scheme is comprised of following two steps: first, does bit allocation for every frame in a GOP, and based on the allocated bits, a predicted quantization parameter is used to do the first rate distortion optimization mode selection for...

20060088103 - Image encoder and method thereof, computer program of image encoder, and mobile terminal: The present invention provides an image coding method comprising: selecting prediction modes from among prescribed plurality of prediction modes based on processed blocks, the number of selected prediction modes being less than the number of said prescribed plurality of prediction modes; predicting a pixel of a block in an input...

20060088101 - Method and apparatus for effectively compressing motion vectors in video coder based on multi-layer: A method and apparatus of improving the compression efficiency of a motion vector by efficiently predicting a motion vector in an enhancement layer from a motion vector in a base layer in a video coding method using a multi-layer are provided. The method includes obtaining a motion vector in a...

20060088102 - Method and apparatus for effectively encoding multi-layered motion vectors: An apparatus and method for improving the compression efficiency of a motion vector by efficiently predicting a motion vector in an enhanced layer from a motion vector in a base layer in a video coding method using a multi-layer structure are provided. The method includes obtaining a motion vector in...

20060088100 - Video coding method and apparatus supporting temporal scalability: A method and apparatus for improving video coding efficiency by combining Motion-Compensated Temporal Filtering (MCTF) with closed-loop coding are provided. The video encoding method includes performing MCTF on input frames up to a first temporal level, performing hierarchical closed-loop coding on frames up to a second temporal level higher than...

20060088104 - Non-integer pixel sharing for video encoding: This disclosure describes video encoding techniques and video encoding devices that implement such techniques. In one embodiment, this disclosure describes a video encoding device comprising a motion estimator that generates non-integer pixel values for motion estimation, the motion estimator including a filter that receives at least three inputs of integer...

20060088105 - Method and system for generating multiple transcoded outputs based on a single input: A method and system for generating multiple transcoded outputs based on a single input. A first transcoding session associated with a first device having first attributes is initiated, wherein the first transcoding session comprises a plurality of video processing operations. A second transcoding session associated with a second device having...

20060088106 - Method and apparatus for improved increased bit-depth display from a transform decoder by retaining additional inverse transform bits: A method and apparatus for processing a video block extracted from an encoded bitstream. The method generally includes the steps of (A) generating a normal block by inverse transforming the video block, the normal block having a normal resolution, (B) generating an alternate block from the video block, the alternate...

20060088108 - Header-estimating moving picture receiving apparatus and output apparatus: A receiving apparatus receives a bitstream that is divided into units encoding a moving picture and includes a stream header indicating how the units are to be decoded. The receiving apparatus estimates the contents of the stream header from the contents of the units, so that decoding of the units...

20060088109 - Header-estimating moving picture receiving apparatus and output apparatus: A receiving apparatus receives a bitstream that is divided into units encoding a moving picture and includes a stream header indicating how the units are to be decoded. The receiving apparatus estimates the contents of the stream header from the contents of the units, so that decoding of the units...

20060088107 - Method and system for multiple description coding and computer program product therefor: Digital signals, such as image/video signals are converted between a first format and a second format by using Multiple Description Coding, whereby the second format conveys multiple descriptions (D1 to D4; D1′ to D4′) of the digital signals. In combination with MD coding, the signals are jointly subject to an...

20060088110 - Driving multiple consecutive bits in a serial data stream at multiple voltage levels: Driving multiple consecutive bits having a same logic value in a serial data stream involves driving a first bit of the multiple consecutive bits in the serial data stream at an initial voltage level, and driving at least two additional bits of the multiple consecutive bits in the serial data...

20060088116 - Frequency correlation based synchronization for coherent ofdm receiver and apparatus thereof: An apparatus for synchronizing pilots contained in symbols received by a receiver in a multicarrier transmission system and a method thereof are provided. Frequency or Time-frequency correlation-based scheme, with exploitation of time-frequency correlation characteristics of the pilots, may be used for identifying the positions of the pilots in frequency or...

20060088113 - Method and circuit arrangement for reducing rfi interference: In a method for reducing RFI interference in a DMT data transmission a compensation signal for the purpose of reducing an RFI interference signal superposed on a transmitted DMT reception signal is generated. Only carrier frequencies of the DMT reception signal in the vicinity of the interference frequency of the...

20060088114 - Methods and apparatus for circulation transmissions for ofdm-based mimo systems: System performance in wireless communication is improved by increasing diversity in time, space and frequency. In OFDM-based MIMO systems in which the number of antennas M is greater then the number of simultaneously transmitted OFDM symbols N, circulation transmissions according to the present invention improve signal diversity. In symbol-based circulation...

20060088112 - Process and a system for transmission of data: A process and a system for transmission of data in a multi-carrier Orthogonal Frequency Division Multiplexing (OFDM) communication system....

20060088115 - System and method for providing 3-dimensional joint interleaver and circulation transmissions: System performance in wireless communication is improved by increasing diversity in time, space and frequency. Information to be transmitted is processed by a convolution encoder to produce encoded bits. The encoded bits are interleaved and mapped to subcarriers. Symbols are created from the subcarriers and the symbols are transmitted so...

20060088111 - Tps decoder in an orthogonal frequency division multiplexing receiver: A receiver for orthogonal frequency division multiplexing (OFDM) signals, including an A/D converter for converting received analog signals to a digital signal data stream and an OFDM demodulator for producing a first set of complex I and Q components of subcarriers from the digital signal data stream. The receiver includes...

20060088117 - Correction-calculation algorithm for estimation of the signal to noise ratio in high bit rate dmt modulation: A method for correcting signals received on a channel. Signals are received along the channel and it is determined how many of the signals are outside a predetermined range relative to a plurality of predetermined constellation points (i.e., erasures). Then, the noise power is estimated the noise power based on...

20060088118 - Method of computing path metrics in a high-speed viterbi detector and related apparatus thereof: A path metric computing method applied in a high-speed Viterbi detector and related apparatus thereof are disclosed. The path metric computing apparatus includes a comparator for generating a control signal according a plurality of previous path metrics, a combining circuit for generating a plurality of first output values according to...

20060088119 - Trellis decoder for decoding data stream including symbols coded with multiple convolutional codes: A trellis decoder decodes a stream of encoded symbols, including symbols of a first type (e.g. symbols encoded with a first trellis code) and symbols of a second type (e.g. encoded with a second, more robust, trellis code), without storing path indicators along a trellis for symbols of the first...

20060088120 - Mixed mode preamble for mimo wireless communications: A method for generating a preamble of a frame for a multiple input multiple output (MIMO) wireless communication begins by, for a first transmit antenna of the MIMO communication, generating a legacy preamble portion for the frame in accordance with a legacy wireless communication protocol, wherein the legacy preamble portion...

20060088121 - Clock modulation systems: Clock Modulation (CM), Shaped Clocked (SC) systems, Modulation and Demodulation (Modem), Baseband Processing (BBP), Intermediate Frequency (IF) and Radio Frequency (RF) signal generation-reception and processing CM methods and implementations are presented. Systems having a data unit for receiving and providing a data signal to one or two clock generators generating...

20060088122 - Direct-conversion frequency mixer: Provided is a direct-conversion frequency mixer for down converting a radio frequency (RF) signal into a baseband signal, in which a single phase RF signal and a quadrature location oscillation (quadrature LO) signal are used to generate the baseband signal, the frequency mixer comprising a first frequency mixing unit that...

20060088123 - Method and system for gaussian filter modification for improved modulation characteristics in bluetooth rf transmitters: Certain aspects of the invention may comprise determining an impulse response of a first Gaussian filter based on a filter length and an oversampling ratio (OSR). The most significant coefficients of the first Gaussian filter may be modified to create a target filter. An upper limit and a lower limit...

20060088124 - Digital predistorter and predistortion method therefor: A predistorter includes: a divider that divides an input signal and supplies the divided input signal to a linear transmission path and a distortion generating path; a (2k−1)th-order distortion generator that raises the signal supplied to the distortion generating path to the (2k−1)th power to generate a distortion component; a...

20060088125 - Multicarrier receiver and transmitter with delay correcting function: A multicarrier receiver that receives N carrier frequencies therein comprises N A/D converters each of which analog-digital converts a receive signal at a sample rate fs for each carrier, N quadrature detectors which receive outputs sent from the N A/D converters therein and digitally quadrature-detect the outputs, respectively, 2N LPFs...

20060088126 - Modulator with controlled transmission bandwidth, and a corresponding method for controlling the transmission bandwidth: The modulator according to the invention is based on the modulation of a PLL, with the bandwidth of the PLL being variable. The modulator also has a means (14, 15) for determination of a signal (φr(kTs); FDEV) which is characteristic of the modulation shift of the modulated signal. Furthermore, the...

20060088127 - Modulation and demodulation system, modulator, demodulator and phase modulation method and phase demodulation method used therefor: The present invention provides a modulation and demodulation system capable of minimizing a bit error rate in a six-phase phase modulation method. A senary signal phase-modulated and outputted by a modulator of a first embodiment is received and phase-modulated by a destination demodulator to a binary signal before conversion by...

20060088128 - Method for demodulating a digital signal based on a generated error signal, and an associated receiver: A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one...

20060088129 - Method for demodulating a digital signal based on an estimate of multipath propagation impairment, and an associated receiver: A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one...

20060088130 - Regenerating apparatus, regenerating method, and receiver: a regenerating apparatus includes an identification circuit, an error correcting circuit, an abnormality detecting circuit which generates an alarm when a predetermined abnormal operation is detected, a threshold value adjusting circuit which adjusts the threshold value to make a first error correction number equal to a second error correction number...

20060088132 - Method for demodulating a digital signal based on an estimate of a symbol of the digital signal, and an associated receiver: A method for demodulating a received digitally modulated signal subjected to multipath propagation impairment includes estimating the multipath propagation impairment of the received digitally modulated signal using a channel estimator, and estimating at least one symbol of the received digitally modulated signal using a symbol estimator. The at least one...

20060088131 - Slicer apparatus and method for generating slicer output values: A method and an apparatus for reducing the area and shortening the critical path of Viterbi circuits in Gigabit Ethernet systems. The present invention replaces the complex four-dimensional Euclidean distance with a simple sum of distances in each dimension as the distance criterion when a slicer is selecting the closest...

20060088133 - Time-frequency correlation-based synchronization for coherent ofdm receiver: There is provided an apparatus for synchronizing pilots contained in symbols received by a receiver in a multicarrier transmission system and a method thereof. Time-frequency correlation-based scheme, with exploitation of time-frequency correlation characteristics of the pilots, is used for identifying the positions of the pilots in time and frequency dimensions...

20060088134 - System and method for generating signal waveforms in a cdma cellular telephone system: A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval,...

20060088135 - Arrangement and method for iterative channel impulse response estimation: An arrangement (300) and method, for iterative channel impulse response estimation in a system such as a GSM/EDGE system employing a transmission channel, by: producing (310) from a received signal (y) a channel impulse response estimate signal (p); and producing (320) from the received signal (y) a noise estimate signal...

20060088136 - Complex filter circuit and receiver circuit: A pseudo-image signal producing section produces a pseudo-image signal imitating an actual image signal. An amplitude detection section detects the amplitude of the pseudo-image signal having passed through a complex filter circuit. A filter control section controls an element value control section in the complex filter circuit so as to...

20060088137 - Multi-frequency clock stretching systems: A multi-frequency clock stretching system is provided. The multi-frequency clock stretching system includes a stretch pulse generator that generates a stretch pulse signal and a multi-frequency clock generator that produces a set of different frequency clock signals in which the clock signal pulses of the set of different frequency clock...

20060083289 - Spread spectrum clock signal generation system and method: A system and method for generating a clock signal having spread spectrum modulation. The method involves generating a clock signal by generating edge positions for edges of the clock signal from a digital representation of a timing for each edge to impart spread spectrum modulation to the clock signal. A...

20060083290 - Frequency estimation method of mb-ofdm uwb system using time frequency hopping strategy: There is provided a frequency estimation method of multiband (MB)-orthogonal frequency division multiplexing (OFDM) ultra wide band (UWB) system using an Alt-PHY time frequency (TF) hopping strategy based on IEEE 802. 15. 3a. The frequency estimation method includes the steps of: a) selecting a predetermined number of frequencies among a...

20060083292 - Method and apparatus for rake finger allocation in a ds-cdma receiver: A Direct-Sequence Code Division Multiple Access (DS-CDMA) receiver and method of allocating probing correlators and combining correlators (fingers). A front-end processor converts received radio signals to baseband samples. Based on average path strengths, a controller adaptively allocates probing correlators to signal paths to de-spread certain received signals. Based on path...

20060083294 - Modulating signals for coherent and differentially coherent receivers: A system incorporates TH-IR and TR-IR transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a...

20060083293 - Phase multi-path mitigation: A system and method for mitigating a multi-path-induced error in a global navigation satellite system (GNSS) is described. In one embodiment of the method, a composite signal is received. The composite signal includes a band-limited direct-path signal and at least one band-limited multi-path signal that are each modulated with periodic...

20060083291 - Receiver apparatus, and associated method, for operating upon data communicated in a mimo, multi-code, mc-cdma communication system: Apparatus, and an associated method, for mitigating interference introduced upon data communicated to an MIMO receiver using an MC-CDMA communication system. The dimension of the received data is reduced to a single-representation in a manner in which inter-code and inter-antenna interference is mitigated....

20060083295 - Throughput maximization in wireless communication systems: A communication method comprising characterizing a communications channel, determining a data rate and optionally a power allocation strategy that maximizes channel throughput, and configuring a transmitter to send a transmit signal with said data rate and said optional power allocation strategy....

20060083297 - Filters for communication systems: The invention relates to a cascaded scheme in which an RRC filter, a modified RRC filter or other digital filter is implemented at a relatively low data rate, such as twice the symbol or chip rate, or 2×. Interpolation filters are used to increase the data rate to a higher...

20060083296 - Method and apparatus for generating coefficients in continuous time equalizers: Systems and methods are disclosed to adaptively generate coefficients for continuous time least mean square error equalizers and to correct offset in high-gain amplifiers. An adaptive coefficient generator includes a bank of individual coefficient generators, each utilizing a first adaptive correction signal for a first correction and a second adaptive...

20060083299 - Moving image encoding apparatus and control method therefor: Detects from camera information frames of probable low continuity, such as frames in which a strobe is flashed, and does not use such frames as candidate images for a reference image. As a result, the possibility that the candidate images in the frame memory are images of high continuity with...

20060083298 - Reference picture management in video coding: A method for encoding a sequence of pictures comprising using one or more pictures as reference pictures, labeling the reference pictures with a first parameter, signaling the first parameter to a decoder, and using a reference picture management, wherein all the reference pictures are identified by a second parameter which...

20060083300 - Video coding and decoding methods using interlayer filtering and video encoder and decoder using the same: Video coding and decoding methods using interlayer filtering and a video encoder and decoder using the same are provided. Multi-layer video coding employing a plurality of video coding algorithms can improve video coding efficiency by using interlayer filtering. The video coding method includes encoding video frames using a first video...

20060083303 - Apparatus and method for adjusting bitrate of coded scalable bitsteam based on multi-layer: Disclosed are a method and an apparatus for realizing signal to noise ratio (SNR) scalability in a video stream server in order to transmit a video stream in a variable network environment. An apparatus for adapting a bitrate of a coded scalable bit-stream based on multi-layers to a variable network...

20060083304 - Identification of replay segments: Identification of segments based upon scoreboards and logos....

20060083302 - Method and apparatus for predecoding hybrid bitstream: A method and apparatus for efficiently predecoding a hybrid bitstream generated by a plurality of coding schemes are provided. The method includes obtaining a first bit-rate for a boundary between the lower layer bitstream and the upper layer bitstream and a second bit-rate for a boundary between motion information and...

20060083301 - Transmitting device, reconstruction device, transmitting method and reconstruction method for broadcasts with hidden subtitles: A transmitting device includes a main image generation unit generating a main image by overlaying first overlay data over an original image; an extraction unit extracting, from the original image, a partial image of a portion over which the first overlay data is overlaid; a first sub-image generation unit generating...

20060083305 - Distributed motion detection event processing: A motion detection system can detect motion at a macroblock level of granularity and take an action based on the detection of motion or an event in a specified region of interest. The system comprises an ASIC capable of detecting an event in a macroblock of a frame of a...

20060083306 - Video decoding methods and devices: A video decoding method. The first frame of video data is acquired, the first frame is assigned to the backward reference frame and the forward reference frame respectively, and a frame buffer is emptied. Next, the next frame of the video data is acquired, and frame type is then determined....

20060083310 - Adaptive overlapped block matching for accurate motion compensation: The present invention provides a method of adaptively selecting an optimal pixel block within an image frame. The method comprises the activity of selecting an optimal block size for fast and accurate motion estimation. The traditional block is extended into an overlapped region to form an extended pixel block. Statistical...

20060083307 - Apparatus and method for calculating the reference address of motion compensation of an image: An apparatus and method for calculating the reference address of motion compensation of an image is used for calculating the reference address of motion compensation of an image in MPEG4 and DivX format. The apparatus comprises a shifter for logically shifting the motion vector of an image to the right...

20060083308 - Apparatus and method for generating a coded video sequence and for decoding a coded video sequence by using an intermediate layer residual value prediction: A video coder performs a motion-compensated prediction both in the base layer and in an enhancement layer to determine motion data of the enhancement layer by using the motion data from the base layer and/or to predict sequences of residual error pictures after the motion-compensated prediction in the enhancement layer...

20060083309 - Apparatus and method for generating a coded video sequence by using an intermediate layer motion data prediction: In the scalable video coding in connection with motion compensation both in a base layer and in an enhancement layer, a prediction of the motion data of the enhancement layer is performed by using the motion data of the base layer to obtain a scalability concept, which provides, on the...

20060083311 - System and method for segmentation of macroblocks: A method for processing a video stream is disclosed. The method generally includes the steps of (A) checking a respective first motion vector for each of a plurality of blocks in a group within an inter-coded picture of the video stream, (B) loading first motion compensation data for the group...

20060083312 - Low cost video compression using fast, modified z-coding of wavelet pyramids: An entropy efficient video coder for wavelet pyramids approaches the entropy-limited coding rate of video wavelet pyramids, is fast in both hardware and software implementations, and has low complexity (no multiplies) for use in ASICs. It uses a modified Z-coder to code the zero/non-zero significance function and Huffman coding for...

20060083315 - Digital broadcast sending apparatus, receiving apparatus and digital broadcast system: In the digital broadcast to a mobile unit, the continuous reproduction of an image cannot be guaranteed when switching the hierarchical level in accordance with the receiving condition of the radio wave and therefore the viewer has a sense of discomfort. A digital broadcast sending apparatus sends out by encoding...

20060083313 - Memory managing method and video data decoding method: A memory managing method for video data decoding process is provided. The memory managing method includes the following steps. A first frame having a first definition is stored, wherein the first frame is a first type or a second type. A second frame having the first definition is stored, wherein...

20060083316 - Methods for determining block averages for film grain simulation: The present invention provides methods for determining block averages in film grain simulation including determining block averages during a display process and determining block averages during a decoding process. The methods of the present invention exhibit different characteristics in terms of memory requirements and computational cost. More specifically, the first...

20060083314 - Methods, apparatus and system for film grain simulation: The present invention provides a method, apparatus and system for providing fast access to film grain patterns in a film grain simulation process including providing a first memory storing at least one film grain pattern and in response to a film grain pattern required by the film grain simulation process...

20060083317 - Error detection method and apparatus in dmb receiver: Provided is a method and apparatus for detecting errors generated by a DMB receiver by not processing received audio/video data in realtime. The error detection method includes: calculating a time required to process one frame obtained by dividing received data into frames having a predetermined size; and determining as an...

20060083318 - Constellation design for pcm upstream modulation: A method for constellation design in telecommunications network using pulse code modulation to transmit data signals upstream between client and server voice-band modems. The invention selects a constellation for transmission over an analog channel of an equivalence class of data points using pulse code modulation based on the presence or...

20060083319 - Blind synchronization and demodulation: Techniques are described that provide inter-symbol interference—(ISI) and multi-user interference—(MUI) resilient blind timing synchronization and low complexity demodulation in wireless communication systems. A nonzero mean symbol is transmitted with a predetermined period in a stream of zero mean symbols during a synchronization phase. Only nonzero mean symbols are transmitted outside...

20060083320 - Demodulation of multiple signals: A demodulation system for receiving and demodulating multiple modulated signals, including a first modulated signal having a first bit rate and/or a first modulation format and a second modulated signal having a second bit rate and/or a second modulation format. The demodulator demodulating the first modulation format modulated signal provides...

20060083322 - Method and apparatus for detecting transmission errors for digital subscriber lines: A multi-carrier communication system receives up to R corrupted bit groups in one or more data frames of a multi-carrier communication system and corrects the up to R corrupted bit groups in the one or more data frames....

20060083323 - Method and apparatus for detecting transmission errors for digital subscriber lines: A multi-carrier communication system receives a plurality of data frames comprised of a plurality of bit groups in a data stream of a multi-carrier communication system, wherein one or more data frames are corrupt data frames, and corrects each corrupt data frame....

20060083324 - Method and apparatus for detecting transmission errors for digital subscriber lines: A multi-carrier communication system receives a plurality of data frames comprised of a plurality of bit groups in a data stream of the multi-carrier communication system, wherein up to R bit groups are identified as corrupted by analyzing corresponding tone values, and corrects the up to R bit groups associated...

20060083325 - Method and receiver circuit for reducing rfi interference: In a method for generating a compensation signal for the compensation of at least one RFI interference signal that, in a DMT transmission, is permanently superposed on a received DMT reception signal being divided into a multiplicity of channels at least one reference channel from the multiplicity of channels is...

20060083321 - Multi-carrier communication bit-loading in presence of radio-frequency interferers: An apparatus and method of compensating for radio frequency interference (RFI) if present in a tone in a multiple tone system to derive an equivalent noise power that can be used in bit-loading to achieve a better bit rate....

20060083326 - System for wireless resource assignment in multiband ofdm: A multi-band orthogonal frequency division multiplexing (OFDM) system transmits the same symbol at least two times, and a receiving end can receive transmission data from a transmitting end accurately even when an error occurs from a wireless resource used by the multi-band OFDM system. To this end, the multi-band OFDM...

20060083327 - Method for phase noise mitigation in mimo-ofdm systems: A phase noise mitigation method which mitigates phase noise for MIMO-OFDM. A criterion is provided which jointly optimizes both spectral efficiency and receiver performance by determining the best number of pilots....

20060083329 - Methods and systems for utilizing universal frequency translators for phase and/or frequency detection: Systems and methods for utilizing universal frequency translators within gated energy transfer systems for phase detection and/or frequency detection. Phase and/or frequency detection can be utilized for comparing a higher frequency reference signal with a lower frequency local oscillator signal. Phase and/or frequency detection can also be utilized for phase...

20060083328 - Selective scrambler for use in a communication system and method to minimize bit error at the receiver: A communication system for transmitting and receiving a sequence of bits, and the methodology for transferring that sequence of bits are provided. The communication system includes a transmitting circuit and a receiving circuit. Within the transmitting circuit is a scrambler that comprises a shift register, an enable circuit, and an...

20060083330 - Distortion compensation table creation method and distortion compensation method: Fundamentals and IM waves comprising distortion signals are detected by vector measurement from an amplified baseband signal. Detected IM waves are related to power and frequency and plotted on the frequency axis. IM waves related to power and frequency are subjected to IFFT processing, and thereby converted so as to...

20060083331 - Method and apparatus for a transceiver having a constant power output: The present invention includes a transceiver and a method of operating the same that includes in the transmitter a power control circuit that operates on an analog differential signal containing data packets individually. The power control circuit initially transmits a series of data symbols with known values, periodically strobes the...

20060083332 - Apparatus enabled for optimizing spectral efficiency of a wireless link: An apparatus simultaneously transmits at least a first signal and a second signal. Each one of those signals comprises a data sequence and a training sequence. The apparatus is arranged to simultaneously transmit a training sequence of the first signal and a data sequence of the second signal for improving...

20060083333 - Modulating signals for coherent and differentially coherent receivers: A system incorporates TH-IR and TR-IR transceivers in the same wireless network. A transmitter modulates a sequence of bits in a wireless communications network by generating a reference waveform and a data waveform of a waveform pair for each current bit. The phase of the reference waveform depends on a...

20060083334 - Noise bqlqnced qam detection: A method of demodulating digital data using M′ary QAM has been disclosed, comprising the steps of detecting a complex symbol vector D, establishing within which reference symbol boundaries the detected symbol vector D falls, the given reference symbol boundaries being associated with a complex reference vector R. Quadrature components (E_I...

20060083335 - Receiver architecture with digitally generated intermediate frequency: A receiver can be configured to include an RF front end that is configured to downconvert a received signal to a baseband signal or a low Intermediate Frequency (IF) signal. The receiver can downconvert the desired signal from an RF frequency in the presence of numerous interference sources to a...

20060083337 - Decoder, decoding method, and disk playback device: A decoder including a Viterbi decoding section for Viterbi-decoding data and a fixed delay tree search decoding section for fixed-delay-tree-search-decoding the data includes a metric calculation circuit used by both the Viterbi decoding section and the fixed delay tree search decoding section....

20060083336 - Encoding and decoding of frame control header in downlink subframes in wireless communication systems: Techniques and devices for encoding and decoding a signal channel in a downlink signal in wireless communication systems, including the frame control header (FCH) data in IEEE 802.16 systems with reduced transmission power consumption, improved error correction capability, and reduced decoding complexity....

20060083338 - Noncoherent ultra-wideband (uwb) demodulation: Techniques are described that provide noncoherent demodulation via correlating “dirty” templates in wireless communication systems. In particular, the described techniques cross-correlate dirty templates that are adjacent symbol-long segments of the received noisy waveform. Unlike transmitted reference (TR) and differential templates that are noisy, i.e., propagate through the wireless communication channel,...

20060083339 - Parallel sampled multi-stage decimated digital loop filter for clock/data recovery: The present invention utilizes a parallel sampled multi stage decimated digital loop filter for clock and data recovery function. In particular, the present invention provides multiple sampling clocks, with these clocks having sampling clock phases separated in time. These clocks are used in conjunction with multiple data detectors and phase...

20060083340 - Two-way ranging between radio transceivers: A method estimates a distance between transceivers in a wireless communications network. A first time interval T is set in a transmitter and a receiver. A signal is transmitted from the transmitter to the receiver at a time t2 according to a first clock of the transmitter. The signal is...

20060083341 - System and method to reduce jitter: One disclosed embodiment may comprise an interpolation system that includes an interpolator that interpolates between a selected phase from a preceding cycle and a selected phase from a current cycle to provide an interpolated phase for the current cycle. An edge of the interpolated phase for the current cycle has...

20060083342 - Oversampling apparatus, decoding lsi chip, and oversampling method: Audio data is oversampled a frame by frame basis at an oversampling ratio of α, with using an output buffer which has a memory capacity α+1 times as much as one frame of the data, such that the output buffer is divided into memory areas 1, 2, . . ....

20060083343 - Clock generation using phase interpolators: A serial data link, which derives an incoming data clock linked to the data rate of the incoming data, also generates an outgoing data clock that is used to re-transmit the data from the serial link into the communications channel. The incoming and outgoing data clocks are derived from a...

20060078038 - Analog signal separator for uwb versus narrowband signals: A system, method, and computer program product for removing “narrowband” interference from a broader spectrum containing a UWB signal, in a receiver of the UWB signal. The RFI is extracted from a broader spectrum to remove interference from the UWB signal, by employing an impulse response in a radio front-end...

20060078039 - Predictive collision avoidance in macrodiverse wireless networks with frequency hopping using switching: A communication system using fast macrodiversity switching (FMS) and frequency hopping (FH) for wireless signals including downlink signals to and uplink signals from mobile stations. Frequency hopping sequences are determined for the uplink and downlink signals for the mobile stations. A plurality of transceiver stations employ broadcast channels and dedicated...

20060078040 - Apparatus and method for cell acquisition and downlink synchronization acquisition in a wireless communication system: An apparatus and method for cell acquisition and downlink synchronization acquisition in an OFDMA wireless communication system are provided. In an SS apparatus in a broadband wireless communication system, a preamble subcarrier acquirer extracts subcarrier values having a preamble code from an FFT signal. A multiplier code-demodulates the subcarrier values...

20060078041 - Transmitter, receiver, and data communications system and method: There is provided a transmitter that transmits data in a spread spectrum communications system including a spread modulation portion spreading transmitting data with a spread code, an RZ conversion portion converting the transmitting data spread to an RZ signal, and an impulse sequence conversion portion multiplying the RZ signal by...

20060078042 - Decoding method using adaptive step-size algorithm for a space-time coded ds-cdma system: Disclosed is a method for decoding received signals on communication channels between at least one transmit antenna and plural receive antennas in a space-time coded direct sequence (DS)-CDMA communication system. The decoding method includes steps of: adjusting the step-size which is an update unit for the tap weight vector for...

20060078043 - Receiver for a cdma system: The receiver includes at least one channel (V1) with an adapted filter (20) and with a symbol clock signal (Hs) recovery circuit (12) and other channels (V2, . . . , Vk) with a sliding correlator (302, . . . , 30k) using the symbol clock signal (Hs) produced by...

20060078044 - Various methods and apparatuses for imulse noise mitigation: Methods and apparatuses for reducing effects of impulse noise in a DSL transmitter receiver device are described. According to certain embodiment, the method includes using a periodicity associated with the impulse noise affecting a DSL transmitter receiver device to determine data frames that are affected by the impulse noise, and...

20060078046 - Method and system for multi-path video delivery and distribution: A system and method for processing and transmitting signals. The system includes a first encoder configured to receive a digital video signal and encode the digital video signal based on a first encoding format, a second encoder configured to receive the digital video signal and encode the digital video signal...

20060078045 - Output method for improving video image quality: An output method for improving video image quality is provided. First, a frame data of a first frame is received, wherein the first frame may coincide with a first type or a second type. Thereafter, the first frame is subjected to a signal process step to output a processed first...

20060078047 - Video analysis, archiving and alerting methods and apparatus for a distributed, modular and extensible video surveillance system: Systems and methods are disclosed for analyzing, managing and cataloguing video tracks generated by a video surveillance system. Systems and methods operating in accordance with the present invention receive video tracks from a video surveillance system; analyze them for particular categories of, for example, objects or events, assign unique identifying...

20060078048 - Deblocking filter: The invention is related to decoding of block wise coded video pictures. The determination of using de-blocking filtering between coded blocks is based on alternative characteristics compared to the characteristics used in H.264/AVC....

20060078049 - Method and system for entropy coding/decoding of a video bit stream for fine granularity scalability: A method, program product and device for encoding and/or decoding video data can include treating coefficients in the enhancement layer corresponding to a non-zero coefficient in the base layer differently than a coefficient in the enhancement layer corresponding to a zero coefficient in the base layer. The sign of the...

20060078050 - System and method for increasing svc compressing ratio: A system for increasing the compressing ratio in scalable video coding and the method thereof perform predictive video coding in the spatial low sub-bands of the temporal low sub-band picture in the group of pictures after the temporal filtering and spatial discrete wavelet transform. This determines an optimized predictive mode...

20060078051 - Adaptive intra-refresh for digital video encoding: An adaptive Intra-refresh (IR) technique for digital video encoding adjusts IR rate based on video content, or a combination of video content and channel condition. The IR rate may be applied at the frame level or macroblock (MB) level. At the frame level, the IR rate specifies the percentage of...

20060078052 - Method and apparatus for parallel processing of in-loop deblocking filter for h.264 video compression standard: A parallel deblocking filtering method, and deblocking filter processor performing such deblocking, for removing edge artifacts created during video compression. The method includes loading luma samples for a macroblock. Filtering is performed on a set of vertical edges of the macroblock using information in the luma samples, with vertical edge...

20060078053 - Method for encoding and decoding video signals: In one embodiment of the method of decoding an encoded video signal including a first frame sequence and a second frame sequence by inverse motion compensated temporal filtering, one or more macroblocks in at least one frame in the second frame sequence associated with a current macroblock in a current...

20060078054 - Method and apparatus to improve decoding of composite video signals: Video decoder systems in which both the analog-to-digital converter and the composite decoder are driven by the stable sample clock, such as a crystal source. The outputs of the composite decoder are provided to a source rate converter, having an output that is provided to a digital output formatter. The...

20060078056 - Moving picture decoding method, moving picture decoding apparatus and program recording medium: A moving picture decoding apparatus is provided which reduces the deterioration in image quality due to errors by a concealment processing for decoded image data, thereby improving the image quality of decoded images, without causing high deterioration in image quality resulting from the concealment processing. The moving picture decoding apparatus...

20060078055 - Signal processing apparatus and signal processing method: A signal processing apparatus and signal processing method which can realize a noise reduction filter capable of displaying noise reduction effects of same levels with respect to images scaled to various sizes are provided. The signal processing apparatus and signal processing method select adjacent pixels when executing noise reduction filtering...

20060078057 - Broadcasting receiving apparatus and method of producing reference signal using the same: To provide a broadcasting receiving apparatus including a receiving section configured to receive a digital broadcasting signal, a processing section configured to recover and reproduce a program from the digital broadcasting signal received by the receiving section, a display section configured to display the program recovered by the processing section,...

20060078059 - Apparatus and method for allocating subchannel and power in an orthogonal frequency division multiple access system: An apparatus and method for allocating transmission power of a subchannel for each individual user in an orthogonal frequency division multiple access (OFDMA) system. The apparatus and method comprises determining the number-of-transmission bits per symbol approximating an estimated signal-to-interference ratio (SIR) for each of subchannels when transmission power is uniformly...

20060078060 - Multicarrier transmission system with low power sleep mode and rapid-on capability: A muticarrier transceiver is provided with a sleep mode in which it idles with reduced power consumption when it is not needed to transmit or receive data. The full transmission and reception capabilities of the transceiver are quickly restored when needed, without requiring the full (and time-consuming) initialization commonly needed...

20060078058 - Orthogonal frequency division multiplexing (ofdm) receiver capable of correcting in-phase and quadrature-phase mismatch and method thereof: An OFDM receiver includes a demodulator unit being coupled to a received signal for demodulating both an in-phase (I) component and a quadrature-phase (Q) component of the received signal; a serial to parallel unit for converting the output of the demodulator to a plurality of parallel paths, each path corresponding...

20060078061 - Likelihood calculating method and communication method: A likelihood calculating method, which uses a receiver having information data of plural signal points based on predefined data which consist of plural bits transmitted from a transmitter, comprises: receiving a reception signal from the transmitter; selecting a first signal point which, among the plural signal points, is the shortest...

20060078062 - Method and system for a turbo trellis coded modulation scheme for communication systems: Method and System for evaluating a turbo-coding scheme suitable for VDSL2 systems. The scheme is a Turbo-Trellis Coded Modulation TTCM that makes use of a Parallel Concatenated Convolutional Code (PCCC) including an inner Latin square/rectangular matrix of Random sequence pattern Interleaver (LRI) of approximately 2044 bits. In the presence of...

20060078063 - Block modulation: A device and method for block transmission are provided including means for storing at least one transmission matrix relating to a set of symbols, and means for applying at least part of said at least one transmission matrix to symbols forming at least a subset of said set of symbols...

20060078064 - Method and radio communication device for the transmission-efficent editing of multimedia news: In order to edit, in a transmission-efficient manner, multimedia news before sending or receiving such news, the existing user data volume (VOL) of a piece of multimedia news (MM) is determined prior to, during, and after putting together such piece of multimedia news (MM). At least one application reducing the...

20060078065 - Digital pre-distortion technique using nonlinear filters: A linearizer and method. In a most general embodiment, the inventive linearizer includes a characterizer coupled to an input to and an output from said circuit for generating a set of coefficients and a predistortion engine responsive to said coefficients for predistorting a signal input to said circuit such that...

20060078066 - Apparatus and method for minimizing a papr in an ofdm communication system: A transmitter for minimizing a PAPR in OFDM communication system. The transmitter includes: a precoder for coding input symbols so that a signal rotation is generated, and generating a complex vector including the coded symbols; an encoder for performing a frequency-space mapping for the symbols generated as the complex vector...

20060078067 - Apparatus and method for direct quadrature power amplifier modulation: A direct power amplifier modulator that accepts bipolar I and Q data, either baseband or multi-carrier digital IF, and generates the resultant magnitude and sign components. Also described is a direct power amplifier modulator that generates quadrature terms of the carrier frequency offset by 90°, wherein each term is shifted...

20060078069 - Hybrid receiver architecture using upconversion followed by direct downconversion: A receiver configured to selectively receive an RF signal from an operating band having a plurality of RF channels. The receiver is configured to upconvert the desired RF channel to an intermediate frequency (IF) greater than the RF channel frequencies. The upconverted RF channel is downconverted to baseband or a...

20060078068 - Methods and apparatus for wireless communication: One embodiment of the invention is directed to operating, in a wireless network, a device that is designed for operation in a different wireless network. In one embodiment, a device designed to operate in a GSM wireless network may be used to communicate in a PHS wireless network....

20060078071 - Carrier and symbol timing recovery apparatus usable with a vestigial side band receiver and recovery method thereof: A carrier and symbol timing recovery apparatus usable in a VSB (Vestigial Side Band) receiver, and a method thereof. For a carrier and symbol timing recovery, error information is detected using a pilot signal, an upper sideband and a lower sideband of a received signal. Each of the detected error...

20060078070 - Carrier phase and symbol timing recovery circuit for an atsc receiver and method of recovering a carrier phase and a symbol timing in received digital signal data: A carrier phase and symbol timing recovery circuit and method may be used for robust synchronization in a broadcasting ATSC receiving system. Carrier phase and symbol timing offsets may be simultaneously adjusted by using redundancy information contained in an ATSC signal spectrum. A desired sampling time instant and carrier phase...

20060078072 - Synchronization signal detection circuit and method of digital television (dtv) receiver: A synchronization signal detection circuit and method of a digital TV (DTV) receiver are provided. The synchronization signal detection circuit determines a precise main path by determining powers in consideration of the influence of multiple paths near signals located at a peak value location and guarantees a stable operation of...

20060078073 - Communication channel detector and channel detection method: A communications channel detector which determines the availability of a desired type of communications channel in a communication system having at least one communications channel, the communications channels including data streams comprising a number of data symbols. The channel detector includes a phase detector, a phase comparator coupled to the...

20060078074 - Path detection device and path detection method: An adjacent sample comparison processing section 201 compares power values between adjacent samples of a delay profile created based on an oversampled received signal and detects whether the power value is increasing or decreasing. A comparison result storage processing section 204 adds 1 when information on an increase/decrease in power...

20060078075 - Data detection and decoding with considerations for channel estimation errors due to guard subbands: Techniques for performing data detection and decoding in a manner to account for guard subbands are described. A receiver obtains received pilot symbols for pilot subbands and received data symbols for data subbands. Channel estimates are derived based on the received pilot symbols with zeroed-out pilot subbands filled with zeros....

20060078076 - System and method of digital system performance enhancement: The present invention performs a digital computation with a lower than worst-case-required clock period (i.e., a faster clock), and at the same time performs the same computation with a larger, worst-case-assumed, clock period (i.e., a slower clock) on a second system with identical hardware. The outputs from the computations are...

20060078077 - Method and system for undersampled symbol synchronization: Described is a system and method for providing a synchronization pattern in a communication system. The method includes generating a synchronization pattern with good randomness properties; packing a signal for transmission with m headers, each header consisting of the synchronization pattern 1/m symbol-time shifted from the previous header; and transmitting...

20060078078 - Phase detector for comparing phases of data and a plurality of clocks: A phase detector that compares the phases of data and four-phase first to fourth clocks having a half rate of the data and being 90° out of phase with one another. Exemplary embodiments of the phase detector include first to fourth sampling circuits that sample the data by the four-phase...

20060078079 - Clock generator and data recovery circuit using the same: A clock generator and a data recovery circuit. The clock generator includes a voltage control oscillator (VCO) for generating a sampling clock and multi-phase clocks, a multiplexer for receiving the multi-phase clocks and selecting one of the multi-phase clocks to generate a selected clock according to a selection signal, a...

20060072646 - Broadband, ultra wideband and ultra narrowband reconfigurable interoperable systems: Broadband, ultra wideband and ultra narrowband (UWN) reconfigurable, interoperable communication and broadcasting system architectures, combinations and hybrids of ultra wideband (UWB), ultra narrowband (UNB) and efficient broadband wireless, baseband, intermediate frequency (IF) and radio frequency (RF) implementations for Bit Rate Agile (BRA) reconfigurable and interoperable systems, Adaptive Modulation and Coding...

20060072648 - Clock generator and method of generating a spread spectrum clock (ssc) signal: A clock generator and method of generating a spread spectrum clock (SSC) signal, in which a delay cell array (DCA) control signal may be output based on one of a received spread spectrum clock generator (SSCG) signal and a feedback signal. The SSC signal may be generated based on at...

20060072647 - Hybrid communication and broadcast systems: Hybrid communication ad broadcast systems for broadband, ultra wideband and ultra Narrowband (UWN) reconfigurable, interoperable communication and broadcasting system architectures. Combinations and hybrids of ultra wideband (UWB), ultra narrowband (UNB) and efficient broadband wireless, baseband, intermediate frequency (IF) and radio frequency (RF) implementations for Bit Rate Agile (BRA) reconfigurable and...

20060072649 - Frequency hopping ofdma method using symbols of comb pattern: Method for providing frequency-hopping OFDMA using symbols of comb patter, the method including the steps of: a) assigning frequency domain signal X(k) of comb pattern (comb symbol, k is frequency index) to modulated data sequence, the comb symbol comprising predetermined number of sub carriers (sub carrier group) which are placed...

20060072650 - Method and system for managing, controlling, and combining signals in a frequency selective multipath fading channel: Aspects of a method and system for managing, controlling and combining signals in a frequency selective multipath fading channel are presented. Aspects of the system may comprise a searcher that detects a maximum signal energy level among at least one of a plurality of individual distinct path signals in a...

20060072654 - Adaptive generalized matched filter rake receiver system and method: An adaptive generalized matched filter (AGMF) rake receiver system includes a rake receiver and an AGMF weight determination module. The rake receiver is coupled to a spread spectrum input signal and applies a vector of weight signals to the spread spectrum input signal to compensate for dependant noise and generate...

20060072652 - Method and system for single antenna receiver system for hsdpa: Aspects of a method and system for a single antenna receiver system for HSDPA are provided. Aspects of a method for processing RF signals, the method may comprise computing channel estimates based on a plurality of received individual distinct path signals, generating timing reference signals indicating a location of at...

20060072651 - Method and system for single antenna receiver system for wcdma: Aspects of a method and system for a single antenna receiver system for W-CDMA are provided and may comprise computing channel estimates based on received multipath signals. Timing correction signals indicating a location of the received multipath signals may be generated and the received multipath signals may be combined based...

20060072655 - Receiver noise estimation: A power estimator for a Code Division Multiple Access (CDMA) receiver. A noise estimate of a received channel may be made by demodulating a received signal using an empty code or Walsh channel. The noise estimate may also be made by demodulating the Pilot signal in systems where potentially all...

20060072653 - Synchronous acquisition circuit and a synchronous acquisition method of a spread spectrum code: In a synchronous acquisition method of a spread spectrum code, a digital code sequence is generated based on a received radio communication signal. The digital code sequence defines a spread spectrum code which includes a preamble symbol. A plurality of correlation signals are generated based on the spread spectrum code...

20060072656 - Estimation of signal-to-noise ratio by processing measured error vector magnitude:

20060072657 - Pulse width-modulated noise shaper: A pulse width-modulated noise shaper (410) is described, which employs feedback from the power stage (260). Formation of the pulse width-modulated signal is done by applying a digital noise shaper (410) which uses feedback from the output of the power stage. Thus, any errors created by the power stage (260)...

20060072658 - Spread frequency spectrum waveform generating circuit: The objective of this invention is to provide a circuit that generates a spread frequency spectrum waveform with shaped frequency spectrum distribution. The waveform generator has a spread spectrum waveform generating circuit 1 that generates a waveform with a spread spectrum and frequency spectrum distribution shaping circuit that shapes the...

20060072659 - Method for transmitting moving picutres in mobile communication terminal: Disclosed is a method for transmitting moving pictures in a mobile communication terminal. The method comprises the steps of determining if a size of an original moving picture to be transmitted exceeds preset maximum transmission capacity when a user requests transmission of a moving picture, generating a plurality of edited...

20060072660 - Method for video coding artifacts concealment: A method and circuit for processing a reconstructed picture generated from compressed data is disclosed. The method generally includes the steps of (A) estimating a magnitude of coding artifacts created by a coding process for the compressed data based upon the compressed data, (B) generating a plurality of noise samples...

20060072661 - Apparatus, medium, and method generating motion-compensated layers: An apparatus, medium, and method generating a motion-compensating layer, with the apparatus including a spatial layer generator to generate an enhancement layer and a base layer, the enhancement layer including a plurality of temporally sequential video frames, and the base layer including at least one sub video frame obtained by...

20060072662 - Improved video coding: Improved video coding is described to encode video data within a sequence of video frames. To this end, at least a portion of a reference frame is encoded to include motion information associated with the portion of the reference frame. At least a portion of a predictable frame that includes...

20060072664 - Display apparatus: A display apparatus includes a display panel; a motion estimator to divide a current frame into a plurality of blocks having a predetermined size, to calculate a plurality of motion prediction error values by comparing a current block for estimating a motion thereof with a searching region set in a...

20060072663 - Method and system for estimating global motion in video sequences: The invention relates to estimating the global motion between frames of a motion-compensated inter-frame encoded video sequence, directly from the motion vectors encoded within the frames. For any particular frame, the motion vectors are first decoded, and a finite number of sets of vectors are selected. An affine or other...

20060072666 - Method for selecting output motion vector based on motion vector refinement and transcoder using the same: A method of estimating output motion vector includes generating a group of candidate motion vectors, selecting two or more reference vectors, variably establishing a search window, and estimating an output motion vector by performing a motion vector refinement on the search window. The method selects the two or more reference...

20060072665 - Methods and transcoders that estimate an output macroblock and motion vector for video transcoding: Methods and transcoders are disclosed for video transcoding input macroblocks to an output macroblock. One of the methods estimates an output macroblock mode for the video transcoding. A spatial weight is determined based on size of overlapping areas of each of the input macroblocks with a correlation area that is...

20060072667 - Transcoder for a variable length coded data stream: The invention relates to a transcoder (100) for a variable length coded data stream such as an MPEG 2 coded data stream transcoder (100) comprises a receiver (101) which receives the variable length coded data stream. The receiver (101) is connected to a significance processor (107) that determines if a...

20060072668 - Adaptive vertical macroblock alignment for mixed frame video sequences: A video codec provides for adaptive vertical macroblock alignment of mixed interlaced and progressive video sequences. With adaptive vertical macroblock alignment, a video codec enforces a macroblock alignment height restriction on per picture basis, rather than requiring that all frames in a sequence adhere to a uniform height restriction. The...

20060072669 - Efficient repeat padding for hybrid video sequence with arbitrary video resolution: A video codec provides efficient repeat padding of hybrid video sequences having arbitrary video resolution. The video codec repeat pads to expand the active content of pictures in the video sequence out to meet an adaptive vertical macroblock alignment restriction that varies by picture type. For progressive type pictures, the...

20060072670 - Method for encoding and decoding video signals: In one embodiment of the method of decoding an encoded video signal by inverse motion compensated temporal filtering (MCTF), a first image block of the encoded video signal is selectively subtracted from a second image block of the encoded video signal to obtain a decoded second image block. For example,...

20060072673 - Decoding variable coded resolution video with native range/resolution post-processing operation: A video codec provides for encoding and decoding pictures of a video sequence at various coded resolutions, such that pictures can be encoded at lower coded resolutions based on bit rate or other constraints while maintaining a consistent display resolution. The video codec further provide for encoding and decoding pictures...

20060072674 - Macro-block level parallel video decoder: A macro-block level parallel video decoder for a parallel processing environment is provided. The video decoder includes a Variable Length Decoding (VLD) block for decoding the encoded Discrete Cosine Transform (DCT) coefficients, a master node that receives the decoded DCT coefficients, and multiple slave nodes/processors for parallel implementation of Inverse...

20060072675 - Method for encoding and decoding video signals: In one embodiment, a frame in a current frame interval is decoded based on at least one frame in at least one adjacent frame interval. The adjacent frame interval is adjacent to the current frame interval. For example, the adjacent frame interval may be a previous frame interval and/or a...

20060072671 - System, method and apparatus for clean channel change: Presented herein are system(s) and method(s) for clean channel changes. In one embodiment, there is presented a method for changing a channel. The method comprises receiving a portion of a first video bitstream associated with a first channel; receiving a command to switch display from the first channel to a...

20060072672 - Variable coding resolution in video codec: A video codec provides for encoding and decoding pictures of a video sequence at various coded resolutions, such that pictures can be encoded at lower coded resolutions based on bit rate or other constraints while maintaining a consistent display resolution. The video codec employs a coding syntax where a maximum...

20060072676 - Defining interpolation filters for error concealment in a coded image: Concealment of errors in a coded image occurs by first selecting an inter-prediction mode in accordance with the coding of the image. The selected intra-prediction mode, while ordinarily used to specify the direction for obtaining a coding prediction value, also serves to specify the direction for obtaining estimated values for...

20060072677 - Method and apparatus for implementing space frequency block coding in an orthogonal frequency division multiplexing wireless communication system: The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading...

20060072678 - System and method for cellular communications: A a system for allocating subcarriers to subscribers, comprising a subcarriers allocation controller, connected to a subcarrier modulation unit in a transmitter and to a subcarrier demodulation unit in a receiver for setting a group of subcarriers to be used therein. The transmitter and the receiver are part of the...

20060072679 - Method and device for modulation recognition of digitally modulated signals with multi-level magnitudes: A modulation recognition method and device for digitally modulated signals with multi-level magnitudes are provided. The modulation recognition method includes selecting plural of quantization sizes used to construct plural of statistic histograms related to the magnitude of a sequence of data, setting up an off-line processing to extract plural of...

20060072682 - Method and system for pre-equalization in a single weight (sw) single channel (sc) multiple-input multiple-output (mimo) system: In wireless systems, a method and system for pre-equalization in a single weight (SW) single channel (SC) multiple-input multiple-output (MIMO) system are provided. A first receive antenna and at least one additional receive antenna may receive a plurality of SC communication signals transmitted from at least two transmit antennas. Estimates...

20060072683 - Method and system for pre-equalization in a single weight spatial multiplexing mimo system: Certain aspects of the method may comprise receiving a plurality of spatially multiplexed communication signals from a plurality of transmit antennas at a base station. A plurality of vectors of baseband combined channel estimates may be generated based on phase rotation of the received plurality of spatially multiplexed communication signals....

20060072680 - Method of space-time encoding and decoding for frequency selective fading channel: A space-time encoding and decoding for a frequency selective fading channel. An encoder takes two independent data fields of a time slot in input data as a processing unit with space-time orthogonal encoding method, encodes them and generates two data vectors, and two diversity signals, and transmits them simultaneously, each...

20060072681 - Scalable gain retraining generator, method of gain retraining and multiple-input, multiple-output communications system employing the generator or method: The present invention provides a gain retraining generator for use with a MIMO transmitter employing N transmit antennas, where N is at least two. In one embodiment, the gain retraining generator includes a first sequence encoder configured to provide a gain retraining sequence to one of the N transmit antennas...

20060072684 - Data communication for wired and wireless communication: Data communication for wired and or for wireless communication and broadcasting systems for broadband, ultra wideband and ultra Narrowband (UWN) reconfigurable, interoperable communication and broadcasting system architectures. Combinations and hybrids of ultra wideband (UWB), ultra narrowband (UNB) and efficient broadband wireless, baseband, intermediate frequency (IF) and radio frequency (RF) implementations...

20060072685 - Wireless communication system with hardware-based frequency burst detection: A wireless communication system is provided that includes RF circuitry and signal processing circuitry. The signal processing circuitry includes a dedicated frequency burst (FB) search hardware circuit which exhibits relatively low noise in comparison with other digital processing circuitry, such as a DSP and MCU, within the system. The RF...

20060072686 - Method and circuit arrangement for suppressing an orthogonal perturbation: The invention relates to a method as well as a circuit arrangement for suppression of a perturbing quadrature component of a carrier signal of an amplitude-modulated signal during the recovery of the carrier signal in a synchronous demodulator, which outputs a quadrature signal (Q). The perturbing quadrature component of the...

20060072687 - Decoding circuit and decoding method for a viterbi decoder: The invention provides a decoding circuit and a decoding method for a Viterbi decoder. The decoding circuit of the Viterbi decoder includes a branch metric unit, an add-compare-select unit and a path memory unit. The path memory unit includes a data string controller, a trace write-in register array, an idling...

20060072689 - Matched filter and cross correlation method: Disclosed is a matched filter and a method for performing cross correlation thereof. The matched filter includes a demultiplexer for demultiplexing an input sample signal into a predetermined number of signals; and cross correlators that perform a cross correlation of each of the demultiplexed sample signals with a predetermined sequence....

20060072688 - Wireless communication system and method with frequency burst acquisition feature using autocorrelation: A wireless communication system is provided that detects a frequency burst (FB) through analysis of the autocorrelation function of received signals. The system can accommodate the relatively large frequency offsets that are associated with less expensive reference frequency crystals. In one embodiment, the system includes FB search hardware that operates...

20060072690 - Method and system for channel estimation in a single channel (sc) single-input multiple-output (simo) system: The method and system for channel estimation in a single channel (SC) single-input multiple-output (SIMO) system described herein may provide a fast and cost effective approach to concurrently determine propagation channel estimates in a single-transmit (1-Tx) and multiple-receive (M-Rx) antennas wireless communication system. A single weight baseband generator may comprise...

20060072691 - Method and system for hsdpa maximum ratio combination (mrc) and equalization switching: Aspects of a method and system for a single antenna receiver system for HSDPA are provided. Aspects of a system for processing RF signals, the method may comprise a cluster path processor that computes channel estimates based on at least one of a plurality of received individual distinct path signals....

20060072692 - Communication channel tracking apparatus: Apparatus are provided for a communication signal processing apparatus having a channel estimator configured to generate a first channel estimation at a first time point, a linear predictor coupled to the channel estimator, and an adaptive filter coupled with the linear predictor. The linear predictor is configured to predict a...

20060072693 - Signal processing apparatus and method: A method of processing signals received from an array of sensors includes sampling and digitally converting the received signals. The digitally converted signals are processed to provide an output signal, the processing including filtering the signals using a first adaptive filter that enhances a target signal of the digitally converted...

20060072694 - Synchronizing clocks in wireless personal area networks: A method synchronizes a transmit clock of a transmitter with a receive clock of a receiver in a wireless communications network. Times t1, t2, t3, and t4 of the transmit clock corresponding times t1′, t2′, t3′, and t4′ of the receive clock. A synchronization message is generated in a media...

20060072695 - System and method for synchronizing audio-visual devices on a power line communications (plc) network: A method and apparatus for synchronizing streaming media devices within a PLC network. Output synchronization errors exceeding ˜30 ms become noticeable when multiple streaming media devices are outputting an audio stream. The present invention provides a system and method for isochronously sending periodic reference clocks from a master device to...

20060072696 - Semiconductor integrated circuit: A semiconductor integrated circuit includes a charge pump circuit that repeats charge and discharge of a capacitor based on a clock signal when an ON/OFF control voltage is ON; a first delay circuit that delays the ON/OFF control voltage; a switch that shorts an output of the charge pump circuit...