Pulse or digital communications inventions 01/06

20060018365 - Method for transmitting a signal using a precise adaptive modulation and coding scheme in a frequency hopping-orthogonal frequency division multiple access communication system: A method of transmitting a signal by using an Adaptive Modulation and Coding scheme in a Frequency Hopping-Orthogonal Frequency Division Multiplexing Access communication system capable of dividing total frequency bands into a plurality of sub-carrier bands and including a plurality of sub-channels, which are sets of predetermined sub-carrier bands, and...

20060018367 - Method of noise factor computation for chip equalizer in spread spectrum receiver: A method of noise factor computation for a chip equalizer in a spread spectrum receiver, the method including the steps of: computing channel and noise variance estimates for multiple resolvable fading paths of chip signals received at the spread spectrum receiver; computing the sum of power of the channel estimates;...

20060018366 - Method of processing signals within a \"rake\" receiver having several fingers during a change of configuration of the fingers, and corresponding \"rake\" receiver: In the presence of an indication of change of configuration containing the characteristics of a new configuration of fingers of a “Rake” receiver, continue performing the combination by using the old configuration (fng1, fng2, fng3) and, only when all the fingers of the new configuration have delivered a cue, the...

20060018368 - Channel estimation system for a wideband code division multiple access (wcdma) communication system: A channel estimation system is disclosed. The channel estimation system comprises a first memory element having a write function and a plurality of read functions, a pilot signal extraction element adapted to receive a first output of the first memory element, a programmable averaging element adapted to receive the output...

20060018369 - Impulse-based communication system: To provide a synchronization acquisition method, for impulse-based communication, that can easily accomplish synchronization acquisition even in a multipath environment, and that eliminates the need to repeat synchronization acquisition even when transmit information changes, the synchronization acquisition method being implemented using: a code synchronizing correlator (21) which synchronizes received information...

20060018370 - De-spreader operative with selectable operational clock for spread spectrum communication and a method for the same: A de-spreading device for a spread spectrum communication system includes a first and a second correlator assigned to a regular and a power-saving operation mode, respectively. The first correlator performs sampling with a regular operational clock while the second correlator performs sampling with an operational clock higher in rate than...

20060018371 - Apparatus and method for sub-chip offset correlation in spread-spectrum communication systems: An embodiment of the present invention described in the specification and the drawings is an apparatus and method for code correlation in spread spectrum communication systems. The apparatus receives a data sequence, and offsets the data sequence with a fixed sub-chip delay. The data sequence and the offset data sequence...

20060018372 - Apparatus for controlling a digital signal processor for radio isolation and associated methods: A method of operating a radio-frequency (RF) circuitry and a signal-processing circuitry in a mobile telephone apparatus includes at least partially disabling the signal-processing circuitry while transmitting or receiving signals. In one example, a processor is efficiently disabled by generating and servicing an interrupt of relatively high priority. One advantage...

20060018373 - Adsl encoder and decoder: The present invention is an ADSL encoder and decoder. Wherein, the ADSL encoder comprises a digital signal processor, a buffer, a bit extractor and a constellation point mapper. The digital signal processor delivers data bits to the buffer, and again the delivered data bits are transmitted to the bit extractor...

20060018374 - Method of producing a two-dimensional probability density function (pdf) eye diagram and bit error rate eye arrays: A method of producing of a two-dimensional probability density function eye diagram and Bit Error Rate eye arrays generates a two-dimensional PDF array of a correlated waveform record of a data pattern under test which is convolved with a two-dimensional probability density function (PDF) array of the uncorrelated jitter and...

20060018376 - Method for transmitting a digitized message of little information depth: A method for transmitting a digital message of little depth of information such as, e.g. measured values of sensors by transmitters, for example wireless sensors with little power reserves, in which the data are transmitted in pulses and each transmitted pulse transmits the data with a data transmission rate of...

20060018375 - Polar signal processor to drive a segmented power amplifier and method therefore: A circuit for providing AM/PM modulation is described. The circuit provides two drive signals which are later combined in a constructive/destructive fashion. The circuit provides AM modulation with a drive signal having a consistent power level modulated to have varying pulse widths in order to provide variable power within each...

20060018377 - Video encoding method and video decoding method: A picture coding method for preventing occurrence of a malfunction includes: an adding step (Step S203) of coding a memory management command for the first picture of a predetermined picture number and adding the coded command to the second picture that is different from the first picture; and a re-adding...

20060018378 - Method and system for delivery of coded information streams, related network and computer program product therefor: A method controls operation of a network wherein at least one coded information stream is delivered to at least one user via at least one link exposed to variable operating conditions. The method includes the steps of: monitoring the operating conditions of the at least one link, and selectively transcoding...

20060018379 - Method and system for staggered statistical multiplexing: In a multi-channel video transmission system in which channel video segments are operated on by corresponding channel video encoders to encode the video segments into frames organized into groups of defined frame types, an apparatus and method to cause a temporal staggering for the processing of a specific frame type...

20060018383 - Method and apparatus for motion vector assignment: A method for processing a plurality of motion vectors for a video frame to be interpolated using a first reference frame and a second reference frame, each reference frame having a content map, the method including partitioning the video frame to be interpreted into a plurality of areas; determining a...

20060018381 - Method and apparatus for motion vector prediction in temporal video compression: A method for motion vector prediction for a current block, the current block having a set of neighboring blocks that includes blocks that do not have an associated motion vector, is disclosed. The method including deriving a candidate motion vector for each block in the set of neighboring blocks that...

20060018382 - Method and apparatus for motion vector processing: A method for processing a plurality of motion vectors is disclosed. The method includes determining a number of different block sizes in the video frame; and, performing a variable block size motion vector process if the number of different block sizes in the video frame is greater than one, the...

20060018380 - Motion estimation method for video encoding: A motion estimation method for generating a motion vector to encode a original block includes: (a0) generating a center point (CTP); (a) generating a main search window (MSW) around the CTP, which has a step size of 3 and 7×7 points, calculating BDMs corresponding to CPs (check points) in MSW,...

20060018384 - Pipelined coefficient variable length coding: According to a coefficient variable length coding method adopting four-stage pipeline, a 3-dimension value including a run, a level and a last data is obtained by performing a run length coding upon coefficient data, where, after transferring the 3-dimension value, a variable bit vector is obtained from the transferred 3-dimension...

20060018385 - Method and apparatus for intra prediction of video data: A method and apparatus are used for intra prediction of video data. The method includes performing intra prediction on a current macroblock in a plurality of K×L intra prediction modes using original pixel values of a plurality of previous macroblocks that are adjacent to the current macroblock. The K×L intra...

20060018386 - Method for chroma deblocking: The invention is related to decoding of block wise coded video pictures. The determination of using de-blocking filtering between coded chroma blocks is based on alternative characteristics compared to the characteristics used in H.264/AVC....

20060018387 - Apparatus, method, and medium for video synchronization: An apparatus, method, and medium for video synchronization are provided. The apparatus may include a PTS register storing a presentation time stamp (PTS) of a picture to be reproduced and skip enable flag information indicating whether the picture can be skipped, by using a position of the picture in a...

20060018388 - Reduction of aggregate emi emissions of multiple transmitters: A power efficient and reduced electromagnetic interference (EMI) emissions multi-transmitter system for unshielded twisted pair (UTP) data communication applications. For each transmitter, digital transmit data is converted to a current-mode differential signal analog waveform by a digital-to-analog converter (DAC). The output current from each DAC is used to generate the...

20060018389 - Delta modulation for channel feedback in transmit diversity wireless communication systems: A method is described herein for reducing the number of feedback bits needed to send channel state information over a feedback channel from a receiving unit (e.g., mobile terminal, base station) to a transmitter unit (e.g., base station, mobile terminal) in a wireless communication system. In the embodiment, the receiver...

20060018393 - Frequency domain filtering to improve channel estimation in multicarrier systems: A channel estimation system comprises a filtering component that selectively scales a plurality of carriers as a function of location of the plurality of carriers within a frequency band, wherein the plurality of carriers comprises at least one data carrier and at least one pilot carrier. A component thereafter extrapolates...

20060018392 - Intelligent array radio architecture: A receiver sets weights for an antenna array according to a series of algorithms including an energy algorithm, a least squares algorithm and a least mean square algorithm....

20060018390 - Method and apparatus of detecting isi/icsi in an ofdm system: A method for detecting inter-symbol interference (ISI) in an OFDM system includes the steps of computing a first correlation value representing the correlation between a plurality of first signals of a first symbol and a plurality of second signals of a second symbol previous to the first symbol, wherein the...

20060018391 - Method and apparatus of detecting isi/icsi in an ofdm system: A method for detecting inter-carrier-symbol interference (ICSI) in an OFDM system includes the steps of computing a first correlation value representing the correlation between at least one of first signals of a first symbol and at least one of second signals of a second symbol previous to the first symbol,...

20060018394 - Pilot tones in a multi-transmit ofdm system usable to capture transmitter diversity benefits: In a wireless transmitter having a plurality of spatial streams differentiable at a receiver, wherein data is encoded and transmitted over a communication channel with pilot tones to provide the receiver with information about the effects of the communication channel and/or transmitter impairments and/or receiver impairments on the spatial streams...

20060018395 - Systems and methods for a multicarrier modulation system with a variable margin: A multicarrier modem has a plurality of carriers over which data is transmitted. By assigning, foe example, one or more different margins to the individual carriers the data rate and impairment immunity can be increased....

20060018396 - Equalization of transmit diversity space-time coded signals: m

20060018398 - Base station software for multi-user detection uplinks and downlinks and method thereof: A method of multi-user detection in a given uplink and downlink time slot in a software-defined receiver which includes filtering and sampling a received signal; forming a block-banded matrix A of the sampled signals; and solving {circumflex over (d)}=T−1y, where T=(AHA), y=AHx. The methods of solving for the matrix T...

20060018397 - Capacity based rank prediction for mimo design: The performance of a Single Code Word (SCW) design with low complexity MMSE receiver & rank prediction is similar to the Multiple Code Word (MCW) design with successive interference cancellation (SIC). A method of rank prediction comprises calculating MIMO channel matrices corresponding to layer transmissions for each tone, calculating signal-to-noise...

20060018399 - Transmission apparatus and communication system using the same: A characteristic value information retriever 9 retrieves characteristic value information FD2 indicative of another characteristic value which should be newly set as to a transmission signal SS, and a characteristic value modificator 9 controls a characteristic value determinator 8 in such a manner that such a characteristic value which has...

20060018401 - Apparatus using interrupts for controlling a processor for radio isolation and associated method: A method of operating a radio-frequency (RF) circuitry and a signal-processing circuitry in a mobile telephone apparatus includes at least partially disabling the signal-processing circuitry while transmitting or receiving signals. In one example, a processor is efficiently disabled by generating and servicing an interrupt of relatively high priority. One advantage...

20060018400 - Training sequence for linearizing an rf amplifier: There is disclosed a linearization training sequence that is transmitted by means of a radio frequency transmitter which is comprised in a mobile terminal or a base station of a radiocommunication system and transmits bursts according to a given frame structure. The sequence comprises a given number N of symbols...

20060018403 - Optimized high rate space-time codes for wireless communication: A space-time coding arrangement for wireless communications is disclosed where the codes are generated through stochastic approximation. The codes can be optimized over a wide range of performance metrics, receiver structures, and channel characteristics....

20060018402 - Pilot and data signals for mimo systems using channel statistics: A method generates signals in a transmitter of a multiple-input, multiple-output wireless communications system. The transmitter includes Nt transmit antennas. A transmit covariance matrix Rt determined using statistical state information of a channel. The transmit covariance Rt matrix is decomposed using transmit eigenvalues Λt to obtain a transmit eigenspace Ut...

20060018404 - Radio frequency transmitter and method of operating a radio frequency transmitter: A radio frequency transmitter comprising an I/Q modulator for obtaining a modulated output signal from an in-phase signal and a quadrature phase signal, and an I/Q modulator control loop controlling said I/Q modulator, characterized by an activation switch capable of activating/deactivating said I/Q modulator control loop. An operating method thereof....

20060018405 - Frequency modulator and frequency modulation method: A frequency modulation method is provided in which the frequency of a carrier signal is modulated on the basis of the frequency of a modulation signal, and in which the modulation signal is integrated. The carrier signal is integrated, and a differential signal is formed from the integrated modulation signal...

20060018406 - Amplitude and phase matching for layered modulation reception: An apparatus and method for receiving layered modulation signals is disclosed. A typical method includes receiving a layered modulation signal including an upper layer signal and a lower layer signal, demodulating and decoding the upper layer signal from the received layered modulation signal, estimating an upper layer amplitude factor and...

20060018407 - Semiconductor device, memory device and memory module having digital interface: An object of the present invention is to reduce jitter dependent on data patterns by an interface receiver. Another object of the present invention is to provide an LSI capable of automatically adjusting a delay time for jitter reduction so as to be able to control its setting for each...

20060018408 - Method and circuit for generating an auxiliary symbol for adjusting a maq demodulator: In a quadrature amplitude (QAM) demodulator, an auxiliary symbol may be utilized in place of the decision symbol to adjust the decision-feedback loops within the demodulator. For the formation and definition of the auxiliary symbol, the radius and angle information of the received signal or of the preliminary symbol may...

20060018409 - Digital television receiver and method of recovering incoming digital television signal: A digital television receiver includes a tuner for down-converting an incoming signal to produce a down-converted signal according to a local oscillator signal corresponding to a selected channel. A filter is coupled to the tuner for filtering the down-converted signal to produce an intermediate frequency (IF) signal. A carrier recovery...

20060018410 - Multimode detection: In a wireless MIMO system, a multimode detector selects detection mode by channel estimation: ill-conditioned channels trigger use of high performance detection, whereas well-behaved channels lead to low complexity detection. Detection modes typically include maximum likelihood, minimum mean squared error, zero forcing, and so forth....

20060018411 - Pilot transmission and channel estimation for multiple transmitters: Each transmitter is assigned a time-only pilot code, a frequency-only pilot code, or a time-frequency pilot code to use for pilot transmission. The pilot codes may be pseudo-random, orthogonal, and/or cyclic-shift codes. To obtain a channel estimate for a transmitter using a time-frequency pilot code composed of a time-only code...

20060018412 - Method for estimating maximum likelihood frequency offset in mobile communication system in fast rayleigh fading channel environment: Disclosed is a method for estimating a frequency offset in a mobile communication system that divides a predetermined frequency band by a time division scheme to transmit data signals or divides an entire frequency band into a plurality of sub-frequency bands to transmit the data signals. The method includes the...

20060018413 - Coarse timing estimation system and methodology for wireless symbols: A system that facilitates obtaining a coarse estimation of a boundary of symbol with respect to time comprises a peak detector that detects a peak energy of an energy distribution output by a correlator, and an estimating component that adaptively estimates a boundary of the symbol based as a function...

20060018414 - Rf receiver using agc and rf receiving method: A radio frequency receiver using an auto gain controller, and a radio frequency receiving method. The radio frequency receiving method includes receiving and attenuating a radio frequency signal including one or more inband signals of at least one channel and an inter-band signal between the inband signals according to a...

20060018415 - Method for feeding back antenna shuffling information in a multiple-input multiple-output system using a multiple space-time block coding technique: In a method for feeding back combination information of transmitted signals in a multiple-input multiple-output (MIMO) system using a multiple space-time block coding technique, mean square error values are computed in relation to the combination information pieces of the transmitted signals. An index of a combination having a minimum mean...

20060018416 - Programmable sync pulse generator: A programmable sync pulse generator and sync pulse generation method are operable in a clock synchronizer to effectuate data transfer between first circuitry disposed in a first clock domain and second circuitry disposed in a second clock domain. The first clock domain is operable with a first clock signal and...

20060018417 - Phase detection circuit and method thereof and clock recovery circuit and method thereof: The phase detection circuit may allow an operating speed of a semiconductor circuit to be increased irrespective of whether a combinational logic circuit within the semiconductor circuit operates at lower operating speeds. The phase detection circuit may adjust a data rate of an input data signal and selectively enable reference...

20060018418 - Jitter measuring apparatus, jitter measuring method and pll circuit: A jitter measurement apparatus for measuring an intrinsic jitter of a circuit to be tested including a phase detector which outputs a signal according to a phase difference between a supplied first input signal and a supplied second input signal, includes: an input unit for supplying an identical signal to...

20060013284 - Phase stuffing spread spectrum technology modulation: A method of phase stuffing spread spectrum modulation by varying the frequency of an original clock in order to spread the peak energy content highly concentrated in the spectrum at a single original frequency. The spectral energy spreads around such original frequency thereby lowering its peak value. The time position...

20060013285 - Radio communication apparatus, base station and system: Radio communication apparatus for receiving OFDM signal from base station and transmitting FH signal to base station, using sub-channels, base station comparing hopping pattern information items indicating hopping patterns from radio communication apparatuses including radio communication apparatus, and generating collision information when hopping patterns include colliding hopping patterns, includes estimation...

20060013286 - Configurable multimode despreader for spread spectrum applications: A configurable multimode despreader for spread spectrum applications is disclosed herein. The despreader includes a plurality of data lines, at least one selective coupler coupled to the plurality of data lines, at least one multiplier coupled to the selective coupler, and a code input line coupled to the multiplier. The...

20060013287 - Spread spectrum signal processing: The present invention relates to processing of spread spectrum signals, where a continuous signal of a comparatively high frequency is received. This signal is sampled at a basic sampling rate whereby a resulting sequence of time discrete signal samples is produced, which are in turn quantized into a corresponding level-discrete...

20060013288 - Method and circuit for limiting the power of a signal compiled from spread-coded signals: The method is used for limiting the power of a transmission-end signal (xn) compiled from a plurality of differently spread-coded signals. In this context, it is assumed that the quantity of spread codes used for the differently spread-coded signals is known as code engagement information (Cch,SF,k; 80). First, correction spread...

20060013290 - Detection of synchronization timing in cdma receiving apparatus: In a CDMA receiving apparatus according to the present invention, a delay spread calculation unit calculates a delay spread based on timings and levels of paths equal to or higher than a path level threshold, and a same-path detection time range calculation unit calculates a same-path detection time range in...

20060013289 - Multistage adaptive parallel interference canceller: A multistage adaptive parallel interference canceller is disclosed. The multistage adaptive parallel interference canceller for a downlink receiver includes: a plurality of stages of interference cancellation units. Each of interference cancellation units includes: a matched filter for matching a signal from a rake receiver each channel signal and generating a...

20060013291 - Data transmission apparatus, data reception apparatus, data transmission and reception apparatus and data transmission and reception method: An image data serial signal output from the parallel-serial converting circuit 21 is converted into a differential amplitude signal by the LVDS transmitter 22 in such a manner that the amplitude of the differential voltage of the image data parallel signal varies depending on the value of the synchronization code...

20060013292 - Use of adaptive filters in cdma wireless systems employing pilot signals: A CDMA radio system uses an adaptive filter in a receiver to mitigate multipath radio propagation and to filter out interfering signals. Characteristics of an initial stage of the filter preferably are determined by cross correlation of a generated pilot signal and the input signal with the integration of the...

20060013293 - Low latency radio basedband interface protocol: A low latency radio/baseband interface protocol is provided. In one embodiment thereof, 8b/10b encoding is used, which has distinct control characters and data characters. Control characters are used to define the beginning of a frame. More particularly, in accordance with one aspect of the invention, signaling between a baseband portion...

20060013294 - Repeat digital message transmission between a microprocessor monitoring circuit and an analyzing tool: The invention concerns a method for transmitting digital messages through output terminals (22) of a monitoring circuit (18) incorporated in a microprocessor (12) during execution of a series of instructions, the digital messages representing characteristic data stored by the monitoring circuit upon detecting a specific event in the execution of...

20060013295 - Multistage tuning-tolerant equalizer filter: A multistage equalizer filter is presented that, in case of over-compensation leads to an acceptable low level of additional jitter. It has non-saturating data-nodes and output nodes in each of the amplifying compensation stages, even in the envisaged situations of overcompensation where acceptable additional jitter is specified. Up to an...

20060013296 - Multidimensional decision-directed trained adaptive equalization: An embodiment of the invention is a technique to equalize received samples. An equalizer to equalize a multidimensional signal transmitted over a communication channel and having a dimensionality of four or higher. The equalizer is adaptively decision directed trained....

20060013297 - Moving picture decoding method, moving picture decoding program, moving picture decoding apparatus, moving picture encoding method, moving picture encoding program, and moving picture encoding apparatus: A moving picture decoding method of an embodiment according to the present invention is a moving picture decoding method for decoding encoded data of an interlaced scanned picture including Top field and Bottom field, and the method includes a stereo information acquisition step for acquiring stereo information indicating whether Top...

20060013299 - Coding apparatus, coding method, coding method program, and recording medium recording the coding method program: Disclosed is an coding apparatus, an coding method, an coding method program, and a recording medium recording the coding method program. The present invention is applicable to transmission of motion pictures using satellite broadcasts, cable television, Internet, cellular phones, and the like, and recording of motion pictures on recording media...

20060013301 - Image decoding apparatus, image coding apparatus, image communications system and coded bit stream converting apparatus: An image decoding apparatus is capable of decoding coded bit streams with different coding schemes. The image decoding apparatus includes a coding scheme decision section for deciding a coding scheme from coding scheme identification information multiplexed into a coded bit stream, a setting unit for setting header information on a...

20060013300 - Method and apparatus for predecoding and decoding bitstream including base layer: A method and apparatus for extracting a higher quality video stream for a given bit-rate by replacing a specific frame by a base layer frame at a predecoder are provided. A predecoding method performed by the predecoder includes selecting a mode by determining frames to be skipped according to a...

20060013298 - Multi-pass video encoding: Some embodiments of the invention provide a multi-pass encoding method that encodes several images (eg., several frames of a video sequence). The method iteratively performs an encoding operation that encodes these images. The encoding operation is based on a nominal quantization parameter, which the method uses to compute quantization parameters...

20060013302 - Method and system for entropy decoding for scalable video bit stream: A method, program product and apparatus for decoding from a scalable bit stream the binarization results of a video sequence by selectively decoding syntax elements and avoiding redundancy in coding. The result is a decrease in the size of the compressed bit stream of an enhancement layer bit stream. One...

20060013303 - Apparatus and method for compressing video information: A method and apparatus is disclosed for efficiently encoding data representinga video image, thereby reducing the amount of data that must be transferred to a decoder. The method includes transforming data sets utilizing a tensor product wavelet transform which is capable of transmitting remainders from one subband to another. Collections...

20060013304 - Image encoding apparatus and decoding apparatus, image encoding method and decoding method, image encoding program and decoding program, and recording medium: In an encoding method of encoding sub-band coefficients, efficient shape encoding and encoded data decoding corresponding to an arbitrary shape is implemented....

20060013306 - Motion information encoding/decoding apparatus and method and scalable video encoding/decoding apparatus and method employing them: Provided are motion information encoding/decoding apparatus and method and scalable video encoding/decoding apparatus and method employing the same. The motion information encoding apparatus includes a first motion estimation unit, a second motion estimation unit, and an encoding unit. The first motion estimation unit generates base motion data for a layer...

20060013305 - Temporal scalable coding using avc coding tools: A temporally scalable video coding method is provided to interleave pictures from all layers of a video sequence including video sub-sequences organized using enhancement layers following a set of rules: (1) pictures in each layer are to be coded sequentially within the layer; (2) a picture from an upper layer...

20060013308 - Method and apparatus for scalably encoding and decoding color video: A scalable encoding and decoding method and apparatus based on color information of moving pictures are provided. The color video encoding method comprises: generating an encoded luminance bitstream by encoding a luminance component using a motion prediction based encoding method; and generating at least one encoded chrominance bitstream by encoding...

20060013307 - Method or device for coding a sequence of source pictures: The method is characterized in that the pre-analysis phase performs correlation level calculations of the even and odd field blocks of the current picture with the even and odd blocks of the current picture with the even and odd field blocks of the reference picture based on motion vectors calculated...

20060013310 - Temporal decomposition and inverse temporal decomposition methods for video encoding and decoding and video encoder and decoder: Temporal decomposition and inverse temporal decomposition methods using smoothed predicted frames for video encoding and decoding and video encoder and decoder are provided. The temporal decomposition method for video encoding includes estimating the motion of a current frame using at least one frame as a reference and generating a predicted...

20060013309 - Video encoding and decoding methods and video encoder and decoder: Video coding and decoding methods capable of providing motion scalability and video encoder and decoder are provided. The video coding method includes estimating a base layer motion vector and an enhancement layer motion vector for each block in a video frame, removing temporal redundancies in the video frame using the...

20060013312 - Method and apparatus for scalable video coding and decoding: A method and apparatus for video coding supporting spatial scalability by performing wavelet transform using filters with different coefficients according to wavelet decomposition levels are provided. The video coding method comprising removing temporal and spatial redundancies within a plurality of input frames, quantizing transform coefficients obtained by removing the temporal...

20060013311 - Video decoding method using smoothing filter and video decoder therefor: A method and apparatus for increasing output picture quality at a decoding terminal by using a smoothing filter are provided. The video decoding method includes generating a residual frame from an input bitstream, performing wavelet-based upsampling on the residual frame, performing non-wavelet-based downsampling on the upsampled frame, and performing inverse...

20060013313 - Scalable video coding method and apparatus using base-layer: A method of more efficiently conducting temporal filtering in a scalable video codec by use of a base-layer is provided. The method of efficiently compressing frames at higher layers by use of a base-layer in a multilayer-based video coding method includes (a) generating a base-layer frame from an input original...

20060013314 - Method and architecture for compressing image data acquired from a bayer color filter array: For each color channel, the process includes gathering Bayer pattern pixel values by pairs, each pair being composed by two successive pixels belonging to the channel along the scanning direction of the pixels of the image, thus each pair of values representing a current input vector, and calculating a predictor...

20060013315 - Filtering method, apparatus, and medium used in audio-video codec: A filtering method, apparatus, and medium used in an audio-video codec are provided. The filtering method may include determining a predetermined macroblock as a filtering region; expanding the filtering region to further include a portion of a macroblock adjacent to the predetermined macroblock near a boundary between the predetermined macroblock...

20060013317 - Method for encoding and decoding video information, a motion compensated video encoder and a coresponding decoder: A method for encoding video information is presented, where a piece of current video information is segmented into macroblocks and a certain number of available macroblock segmentations for segmenting a macroblock into blocks is defined. Furthermore, for each available macroblock segmentation at least one available prediction method is defined, each...

20060013316 - Video data processing and processor arrangements: Consistent with one aspect, a circuit arrangement performs a variety of operations for tasks relating to motion and includes one or more ALU components. One such circuit arrangement is adapted to provide a picture phone that includes: a telephone transceiver; a camera; a display; a digital signal processor (DSP), including...

20060013318 - Video error detection, recovery, and concealment: Decoding for H.264 with error detection, recovery, and concealment including two parsing functions for efficient detection of errors in exp-Golomb codewords, recovery for error in the number of reference frames, skipping to an uncorrupted SPS/PPS NAL unit, and concealment of invalid gaps in frame number by separate gap size 2...

20060013319 - Image decoding device, image encoding device, and method thereof: The picture decoding apparatus (1100) decodes a coded stream including a moving picture stream that has pictures of different sizes with reference to decoded pictures. The picture memory (203) includes a memory area for holding the decoded pictures. The picture memory dividing method specification unit (210) divides the memory area...

20060013320 - Methods and apparatus for spatial error concealment: Methods and apparatus for spatial error concealment. A method is provided for spatial error concealment. The method includes detecting a damaged macroblock, and obtaining coded macroblock parameters associated with one or more neighbor macroblocks. The method also includes generating concealment parameters based on the coded macroblock parameters, and inserting the...

20060013321 - Packet generating method, video decoding method, media multiplexer, media demultiplexer, multimedia communication system and bit stream converter: A moving image coded string is mapped with a set of information areas as one packet, and each packet is added with an error code and control information in a multiplexing part so that it is decided at the receiving side, from the result of error detection by decoding the...

20060013322 - Method for encoding an xml-based document: The disclosure relates to a method for encoding an XML-based document (DOC), where the contents of the document correspond to an XML-schema voice definition. According to one exemplary method, an encoded binary representation (BDOC) of the document is produced by associating the contents of the document with binary structural codes...

20060013323 - Methods and devices for dynamic quantizing input of a soft decision decoder: Dynamic quantization methods and dynamic quantizers for quantizing soft outputs of an equalizer according to the channel condition in order to alleviate the computational load on a soft decision decoder. The dynamic quantizer assigns only a few bits to represent the equalized signals when the channel condition is good, thus...

20060013324 - Device for processing signals in a mobile station: The device for processing signals may be designed as a transmitting and receiving arrangement or exclusively as a receiving arrangement, and has a baseband component and a radiofrequency component. The interface between the baseband component and the radiofrequency component for the reception path is realized by an exclusively digital interface...

20060013327 - Apparatus for antenna diversity using joint maximal ratio combining: A transceiver using composite beamforming technique is provided wherein a first communication device has a plurality of antennas and the second communication has a plurality of antennas. When the first communication device transmits to the second communication device, the transmit signal is multiplied by a transmit weight vector for transmission...

20060013326 - Propagation path estimation method and apparatus: In estimating propagation path in an OFDM receiver in an OFDM communication system, a CIR estimation unit estimates a group of impulse responses of a propagation path, a valid-impulse discriminator selects impulse responses (CIR), which are greater than a predetermined threshold value, from the impulse-response group, and a propagation path...

20060013325 - Wireless communication system with configurable cyclic prefix length: To transmit data in a manner to mitigate the deleterious effects of delay spread, the expected coverage areas for multiple transmissions to be sent in multiple time slots are initially determined. Cyclic prefix lengths for these transmissions are selected based on the expected coverage areas. The cyclic prefix length for...

20060013328 - Method and detector for a novel channel quality indicator for space-time encoded mimo spread spectrum systems in frequency selective channels: In a jointly encoded (JE), spread spectrum communication MIMO system where a demultiplexed packet is transmitted over multiple streams, two versions of a single channel quality indicator (CQI) is disclosed: generalized SNR or constrained mutual information CMI between the transmitted and received chip vectors. In the receiver, the CMI is...

20060013330 - Mimo transmission system and method of ofdm-based wireless lan systems: A MIMO transmission system and method of an OFDM-based wireless LAN system. The MIMO transmission system includes multiple transmission paths to channel antennas and receives and encodes plural rows of bit streams. The MIMO transmission system does not transmit the plural rows of bit streams through the same paths and...

20060013329 - Signal transmitting device and method of multiple-antenna system: A signal transmitting device and method are provided which separate signals simultaneously transmitted through a multiple-antenna system into respective sub-channel signals. The method includes separating a transmission channel into spatial sub-channels in a time division duplex (TDD) system using a multiple-antenna system. The factors for channel separation of a current...

20060013331 - Current mode differential transmission method and system for transmitting three units of data using four signal lines: Provided are a current mode differential transmission method and system for differentially transmitting three units of data using four signal lines. The method includes: dividing the four signal lines 1a, 1b, 2a and 2b into two pairs of signal lines 1a/1b and 2a/2b, and differentially transmitting respective data (first data...

20060013332 - Method of sending information using superresolution to didtinguish overlapping symbols: The invention is a method of sending information through a bandwidth-constrained information channel at a rate faster than the current limit of the state of the art. It accomplishes this objective by sending overlapping signals which are separated using superresolution methods such as deconvolution to distinguish between symbols which are...

20060013333 - Maximizing power and spectral efficiencies for layered and conventional modulations: Methods and apparatuses for maximizing power and spectral efficiencies in a wireless communication system are disclosed. The invention is particularly useful for layered modulation applications because power levels for such applications are relatively high. A layered modulation signal comprises an upper and a lower layer signal that interfere with each...

20060013334 - Method and device for training an rf amplifier linearization device, and mobile terminal incorporating same: a method whereby a linearization training sequence is designed to be transmitted by means of a radiofrequency transmitter incorporated in a mobile terminal or a base station of a radiocommunication system comprising a fixed network. The sequence is adapted for transmitting bursts in accordance with a specific frame structure. Besides,...

20060013335 - Multi-connection, non-simultaneous frequency diversity in radio communication systems: A radio communication system includes a remote device radio, and a base station radio operable to communicate with the remote device radio at a first channel and at a second channel using non-simultaneous frequency diversity. The base station is operable to communicate with a device other than the remote device...

20060013337 - Constant delay zero standby differential logic receiver and method: A differential receiver circuit on an integrated circuit consumes substantially no standby power, has constant propagation delay regardless of the input common mode bias, has acceptable common mode rejection and includes first and second pass circuits and buffers to receive differential input signals. The first pass circuit provides a true...

20060013336 - Frequency estimation method and system: A multiple linear regression frequency estimation method and system. A phase sequence of a received signal is derived and divided into several subsequences according to predetermined rules. The phase differences of the subsequences are calculated for frequency estimation using linear regression analysis. A plurality of frequency estimation values are obtained...

20060013338 - Incremental pilot insertion for channnel and interference estimation: Dynamic resource allocation systems, apparatus, and methods are disclosed for selectively improving the ability of a receiver to determine a channel estimate in an Orthogonal Frequency Division Multiple Access (OFDMA) system. A wireless communication system can use a common pilot channel configuration to aid channel estimation in one or more...

20060013339 - Diferrential decoder followed by non-linear compensator: Receivers comprising (differential-quadrature-)phase-shift-keying demodulators (4) and differential detectors (10) consisting of decoders (19) are provided with non-linear compensators (20) for compensating decoder output signals for (parts of) interference terms, to improve the decoding process and to reduce the number of incorrect decisions. The non-linear compensators (20) comprise channel estimators (22)...

20060013342 - Method and apparatus for managing buffer for block deinterleaver in a mobile communication system: A method and apparatus for managing a deinterleaver buffer comprised of a plurality of sub-buffers in a receiver that performs Reed-Solomon (RS) decoding on a frame received from a transmitter via a wireless network for a mobile communication system including a block interleaver used in the transmitter. The method and...

20060013343 - Method and system for utilizing space-time and space-frequency codes for multi-input multi-output frequency selective fading channels: A communication system for transmitting encoded signals over a communication channel is disclosed. The system includes a transmitter, which has a source that outputs a message signal. The transmitter also includes an encoder that generates a code word in response to the message signal. The code word has a construction...

20060013340 - Multiple hypothesis channel estimation and prediction for ofdm systems: A method of modeling channel parameters in Doppler environments estimates both the channel model and the coefficients simultaneously, thus not requiring additional packet overhead. This adaptive technique refines the channel coefficients as the estimate of the model accuracy improves with channel measurements. The underlying models are very accurate representations of...

20060013341 - Wireless communication device and mobile station: The occurrence of reception errors due to failure to discriminate between a new transmission and a retransmission is reduced by a wireless communication comprising a storage unit operable to store received data; and a decoding unit operable to obtain a first decoding result by decoding new received data, which is...

20060013344 - Method and system for maximum likelihood detection: Method and system are provided for maximum likelihood detection on information channel, especially relate to detect abnormal signal pattern and change the branch metrics weighting of maximum likelihood detector to reduce effects introduced by noises or abnormal signals, therefore improve the detection performance. The method for adjusting branch metrics weighting...

20060013345 - Oscillator frequency control: A control unit supplies a new control value to a frequency source. The value is determined by the frequency source frequency and the reference frequency. The control unit further calculates a rate of change value based at least on the new and a previous control value if there is communication...

20060013346 - Modular device for multiple reception of a modulated signal: The invention relates to a reception device comprising a number of reception paths (1 to N) and a decoder (30) with weighted inputs. Each reception path (1to N) receives an input of a data stream, corresponding to a modulated signal and embodied to provide a confidence index (CSIi) and an...

20060013347 - Synchronizing a radio network with end user radio terminals: Synchronizing a Radio Network with End User Radio Terminals A Mobile Station that is able to receive GPS signals and compare the frequency of the GPS received time signal with a time signal from a network in order to determine the difference between the signals and communicate that difference back...

20060013348 - Data processing apparatus that identifies a communication clock frequency: A data processing apparatus receives a message containing a sync break interval with a unique bit pattern and a sync field interval identified by the sync break interval. A timing property of the sync field interval specifies the length of bit periods of the message. A clock source circuit supplies...

20060013349 - Recovery circuits and methods for the same: A recovery circuit may include a phase detector, a quadrant decision unit, a quadrant controller, a charge pump unit, and a phase interpolator. The phase detector may compare a phase of input data with a phase of a current output clock to generate first up signal and first down signal...

20060007988 - Apparatus, system and method for flip modulation in an impulse radio communications system: Apparatuses, systems and methods for transmitting and receiving modulated impulse radio signals. An impulse radio receiver includes a time base, a precision timing generator, a template generator, a delay, first and second correlators, a data detector and a time base adjustor. The time base produces a periodic timing signal that...

20060007986 - Packet detection during multiband receiver synchronization: Detecting a packet transmission is disclosed. A first plurality of detection metrics is determined using a first signal having a first synchronization waveform received on a first band. A second plurality of detection metrics is determined using a second signal having a second synchronization waveform received on a second band....

20060007985 - Saturation handling during multiband receiver synchronization: Receiving a signal is disclosed. A signal received in a first band is amplified. It is determined if the amplified signal satisfies a saturation condition. A change to a second band is triggered based at least in part on the amplified signal satisfying the saturation condition....

20060007987 - Spread spectrum clock generator: Disclosed is a spread spectrum clock generator which includes: a first delay control type oscillator that variably controls an oscillation period at a control period interval according to a control signal; a control circuit; a maximum modulation value determination circuit that determines a maximum modulation value from a predetermined value,...

20060007989 - Method and apparatus for monitoring transmission quality: In wireless communications, it is necessary to monitor the transmission quality of communications channels to maintain system performance and operation. The invention provides a way of measuring bit error rates in channels at the receiver, without diminishing channel throughput by inserting quality monitoring data into the signal at the transmitter....

20060007990 - Method and apparatus for scaling parameter estimation in parametric generalized rake receivers: A wireless communication receiver, such as the receiver included in a wireless communication transceiver implemented in a base station or in a mobile station of a wireless communication network, includes a parametric G-RAKE receiver circuit and a method that compute parametric scaling parameters on a per transmission interval basis. In...

20060007991 - Channel fault detection for channel diagnostic systems: A method and computer program product for detecting faults in cables. The invention comprises receiving a first reflected signal; comparing the first reflected signal amplified with a first predetermined receiver gain setting with a first threshold; if the value of the amplified first reflected signal is greater than the value...

20060007992 - Echo canceller gain control for channel diagnostic systems: A method and apparatus for detecting faults in cables. The method and apparatus comprise receiving a reflected signal; multiplying an estimation of the reflected signal from an echo canceller by a predetermined gain factor; subtracting the value obtained as a result of the multiplication from the received reflected signal; and...

20060007993 - Threshold setting using piecewise linear approximation for channel diagnostic systems: A method and apparatus for detecting faults in cables. The invention comprises computing a plurality of thresholds representing a corresponding plurality of values of reflections in the cable; comparing a received reflection to a given threshold; if the received reflection value is greater than the given threshold value, then determining...

20060007994 - Signal quality estimation for continuous phase modulation: A received continuous phase modulation (CPM) signal (which is formed with a set of pulse shaping functions) is approximated as a phase shift keying (PSK) modulated signal (which is formed with just the dominant pulse shaping function having the largest energy). Channel estimation and data detection are performed in accordance...

20060007995 - Apparatus for digital data transmission in state of using mobile telecommunication device and the method thereof: Disclosed is an apparatus and a method for digital data transmission by using a mobile communication terminal, including the steps of converting an analog voice signal into a digital signal, the analog voices signal inputted through a microphone; inserting a watermark into the digital voice signal, the watermark including additional...

20060007996 - Method and system for a fast serial transmit equalization scheme: A transmitting device to send an input signal in a channel includes an equalization system. The equalization system includes a decision subsystem to determine when adjustments need to be made based on the frequency of 0s or 1s in the input signal. The equalization system also includes an equalization subsystem...

20060007997 - Method and apparatus for channel equalization: A method and apparatus is disclosed to overcome the effects of intersymbol interference during data transmission. Overcoming the effects of intersymbol interference makes possible higher data transmission rates for a given error rate. In one embodiment a receiver-transmitter pair is configured with a precode filter at the transmit side and...

20060007998 - Equalization for dmt and ofdm communication systems: The invention provides a DMT or OFDM equalization system that deals with each tone not only separately, but also globally, which provides better overall performance. In the inventive system, only M+T variables are required to be determined, where M is the number of tones and T represents the number of...

20060007999 - Method and system for enhancing image rejection in communications receivers using test tones and a baseband equalizer: Certain embodiments of the invention provide a method and system for enhancing image rejection in communications receivers. A test tone signal may be injected into a receiver. A quadrature error in an in-phase (I) channel and a quadrature (Q) channel of the receiver may be estimated based on the injecting...

20060008000 - Fully scalable 3-d overcomplete wavelet video coding using adaptive motion compensated temporal filtering: A method and device for coding video where a video signal is spatially decomposed into at least two signals of different frequency sub-bands, an individualized motion compensated temporal filtering scheme is applied to each sub-band signal adaptively according to signal contents, and texture coding is applied to each of the...

20060008001 - Pipelining decoding apparatus and method, and computer-readable recording medium for storing computer program for controlling the pipelining decoding apparatus: A pipelining decoding apparatus and method, and a computer-readable recording medium for storing a computer program for controlling the pipelining decoding apparatus. Pixel values of each of the recovered images corresponding to previous macroblocks are stored as neighboring pixel values. Motion is predicted in a picture corresponding to a current...

20060008003 - Embedded base layer codec for 3d sub-band coding: Techniques and tools are described for scalable video coding and decoding. For example, a 3D sub-band video encoder includes an embedded base layer codec as well as temporal sub-band transforms and spatial sub-band transforms. The placement of the base layer codec among the sub-band transforms and the role of the...

20060008002 - Scalable video encoding: A video encoder comprises a video frame receiver (101) connected to a processor (103) deriving relative frames from the received video frames and predicted frames. The processor is connected to a Discrete Fourier Transform (DCT) processor (105) which again is connected to a quantiser (107) for generating quantised spatial frequency...

20060008007 - Adaptive coding method or device: The method containing a pre-analysis phase with pel-recursive type motion estimation and an actual coding phase with block matching motion estimation for picture blocks constituted by one or more sub-blocks, wherein the coding phase also comprises a motion vector selection stage for the picture sub-blocks based on the motion vectors...

20060008005 - Method and device for choosing a motion vector for the coding of a set of blocks: The present invention relates to a method and a device for hierarchical estimation of motion intended to choose a motion vector from among a plurality of motion vectors for a set of blocks of an origin image divided into blocks. A calculation of an energy function over the set of...

20060008008 - Method of multi-resolution based motion estimation and recording medium storing program to implement the method: A method of multi-resolution based motion estimation is provided. The method includes calculating an initial motion vector in a predetermined block of a current frame at a low resolution; determining a search area at a middle resolution based on the initial motion vector; performing motion estimation in the search area...

20060008004 - Video encoder: A is a video encoder includes a data storage for storing a prediction residual, the number of bits of the prediction residual, and a motion vector in each encoded picture, as well as a motion compensator for selecting a motion predict mode from an output of the data storage. The...

20060008006 - Video encoding and decoding methods and video encoder and decoder: Video coding and decoding methods and video encoder and decoder are provided. The video encoding method includes determining one of inter predictive coding and intra predictive coding mode as a coding mode for each block in an input video frame, generating a predicted frame for the input video frame based...

20060008009 - Method and system for entropy coding for scalable video codec: A method, program product and apparatus for encoding a scalable bit stream from the binarization results of a video sequence by selectively encoding syntax elements and avoiding redundancy in coding. The result is a decrease in the size of the compressed bit stream of an enhancement layer. One method includes...

20060008010 - Method of selecting a reference picture: In the method, at least one reference picture for processing a field macroblock is selected from at least one reference picture list using reference picture index information. Here, each selected at least one reference picture is a field, and a parity of the selected at least one reference field may...

20060008011 - Method for synchronizing video signals: A method for synchronizing video signals is provided wherein a synchronization state signal is generated which is descriptive for the synchronization of an output of fields/frames with the respective input of respective fields/frames of an underlying video data screen in particular on the basis of a time difference which is...

20060008012 - Video coding apparatus and video decoding apparatus: A video coding apparatus includes a coder section 101 for coding an input video picture, an important information constructing section 102 for extracting important information from coded information obtained by the coder section, a sync signal generator section 103 for generating a sync signal, and a bit stream reconstructing section...

20060008013 - Method and system for performing deblocking filtering: A system and method for filtering a frame, the method includes: (i) processing, by a processing unit executing instructions, at least one portion of a frame to provide at least one processed frame portion; (ii) performing, by a hardware filter, deblocking filtering of the at least one processed frame portion...

20060008014 - Method and adaptive modulation in multi-carrier communication: In a radio-communication system and a radio station, one or more subcarriers are grouped, and the maximum bit number per symbol of the modulation method used for each subcarrier is determined for each group and shared between a transmitting station and a receiving station. The transmitting station divides and allocates...

20060008015 - Method and apparatus for reducing the dynamic range of a radio signal: In a method for reducing the dynamic range of a multicarrier transmission signal (12′) which is formed in a transmitter and is composed of two or more carriers, the various signal structure timings of the carriers are determined. A delay unit (100; D0, D1, . . . , DN−1) is...

20060008017 - Time-domain windowing of multi-band ofdm system to enable spectral sculpting: A method of wirelessly communicating is disclosed. The method comprises generating a plurality of tones for a wideband orthogonal frequency division multiplex symbol (310), the tones including a plurality of contiguous zero-valued tones, inverse Fourier transforming the tones to a plurality of time-domain samples (312), copying a plurality of the...

20060008016 - Ultra wideband interference cancellation for orthogonal frequency division multiplex transmitters by protection-edge tones: A method of wirelessly communicating is disclosed. The method comprises determining a matrix W based in part on limiting a plurality of active interference cancellation tone values (416), determining the active interference cancellation tone values (416) based on W and based on a plurality of information data values (410), and...

20060008018 - Vofdm receiver correlation matrix processing using factorization: Vector orthogonal frequency division multiplexing (VOFDM) receiver correlation matrix processing using factorization. Efficient correlation matrix processing is used to combine multiple signals into a single combined signal. This single combined signal may be viewed as being a beam form soft decision. An efficient square root factorization system and method provides...

20060008019 - Communications method: The communications characteristics are improved with a communications method for carrying out communications using a plurality of M signal points to be placed on an I-Q plane. When the M signal points are spaced on the I-Q plane around a point of origin to have a uniform space a in...

20060008020 - Method and apparatus for determining channel quality and performing adaptive modulation/coding within a multicarrier communication system: In a multi-carrier communication system employing adaptive modulation and coding, a receiver feeds back channel quality information for a “binned” group of subcarriers instead of sending an individual quality report for each subcarrier. A transmitter will utilize the channel quality information for the bin to determine a set of γeff...

20060008025 - Method and system for rate-2 transmission: The invention relates generally to the field of signal encoding in a multiple input multiple output system in a wireless communication network. This invention specifically relates to a method of encoding and transmitting symbols in a rate-2 complex symbol per second per Hertz transmission system that achieves a maximum diversity...

20060008022 - Multiple input, multiple output communications systems: Embodiments of the present invention include systems and methods for optimizing the transmitter and receiver weights of a MIMO system. In one embodiment, the weights are optimized to create and steer beam nulls, such that each transmitted signal is substantially decoupled from all other signals between a MIMO transmitter a...

20060008024 - Multiple input, multiple output communications systems: Embodiments of the present invention include systems and methods for optimizing the transmitter and receiver weights of a MIMO system. In one embodiment, the weights are optimized to create and steer beam nulls, such that each transmitted signal is substantially decoupled from all other signals between a MIMO transmitter a...

20060008021 - Reduction of self-interference for a high symbol rate non-orthogonal matrix modulation: A method for reducing self-interference between at least four data symbols that are modulated via a non-orthogonal matrix modulation and transmitted from at least four transmit antennas to at least one receive antenna comprises mapping the at least four data symbols onto the at least four transmit antennas and two...

20060008023 - Scalable time-orthogonal preamble supplement generator, method of generating and multiple-input, multiple-output communication system employing the generator and method: The present invention provides a time-orthogonal preamble supplement generator for use with a multiple-input, multiple-output (MIMO) transmitter employing N transmit antennas, where N is at least two. In one embodiment, the time-orthogonal preamble supplement generator includes an initial preamble supplement encoder configured to provide a preamble supplement to each of...

20060008026 - System and method for digital timing error correction in a communications system utilizing adaptive predistortion: A system and method for rapidly correcting the time difference between two signals is disclosed. In particular, a system and method for very rapidly correcting timing errors to the very high degree of accuracy required for digital predistortion adaptation is disclosed. The method is a signal processing technique, which can...

20060008027 - Method for the adaptive pre-distortion of digital raw data values and device for carrying out said method: A method is provided for the adaptive pre-distortion of digital raw data values for a communication appliance output stage having a power amplifier, the method including the following steps: a) the raw data values (Vm) are pre-distorted by multiplying the raw data values by pre-distortion values from a lookup table...

20060008028 - Power amplifier linearization methods and apparatus using predistortion in the frequency domain: To mitigate the effects of non-linear amplification in a digital transmission system employing a multi-carrier multiplexing communications technique, such as orthogonal frequency division multiplexing or discrete multi-tone, predistortion of an input signal to a power amplifier with a non-linear transfer characteristic is performed in the frequency domain by modifying frequency-domain...

20060008029 - Transmitter stage: A transmitter stage working according to the envelope restoration principle includes means for providing an amplitude representation and a phase representation of an amplitude and phase-modulated signal to be transmitted, as well as a phase-locked loop with a feed-forward branch and a feedback branch, as well as amplification control means...

20060008030 - System and method for differential iq delay compensation in a communications system utilizing adaptive aqm compensation: A system and method for compensating for the time delay between the in-phase I and the quadrature Q paths of a digitally modulated transmitter incorporating an analog quadrature modulator is disclosed. The time delay between the in-phase I and the quadrature Q paths is computed and used to calibrate a...

20060008031 - Method and system for maximum transmit diversity: The invention relates generally to the field of signal encoding in a multiple input multiple output system in a wireless communication network. This invention specifically relates to a method of encoding and transmitting symbols in a rate-1 complex symbol per second per Hertz transmission system while achieving maximum diversity. The...

20060008032 - Synchrodyning apparatus: Synchrodyning apparatus in which a PAM IF signal is mixed with unmodulated carriers nominally at the frequency of the carrier, which unmodulated carriers are in quadrature with respect to each other. E.g., the PAM IF signal may be an intermediate-frequency 8VSB digital television signal. The baseband signals resulting from the...

20060008033 - Demodulation of a frequency-modulated received signal by mapping the zero crossings to a sequence of parameter values: A detector for zero crossings determines the zero crossings in the received signal or in an intermediate frequency signal which is generated from the received signal. Since, in the case of frequency-modulated signals, the number of zero crossings per symbol interval is naturally not constant, the zero crossing sequence is...

20060008035 - Payload boundary detection during multiband receiver synchronization: Detecting a boundary within a transmitted packet is disclosed. A first symbol of the transmitted packet is received in a band. A second symbol of the transmitted packet is received in the band. The first and second symbols are compared. The boundary within the transmitted packet is detected based at...

20060008036 - Receiving method and receiving apparatus: One correlation value is selected with high accuracy from among a plurality of correlation values which have been subjected to Walsh transform. A Fast Walsh Transform (FWT) computing unit performs an FWT computation on CCK-modulated signals and outputs 64 Walsh transform values. A maximum value search unit inputs 64 Walsh...

20060008034 - Spreading codes for quasisynchronous code division multiple access systems: Described herein is a method of generating spreading codes which ensures that the cross-correlation is −1 for all pairs of sequences within the relevant time delays....

20060008037 - Apparatus and method for estimating a carrier-to-interference-and-noise ratio in a communication system: In an apparatus for estimating a Carrier-to-Interference-and-Noise Ratio (CINR) in a communication system, received signals are blocked based on sub-carriers with similar channel characteristics. Interference and noise levels and true received signal levels are computed on a block-by-block basis from the blocked received signals. CINRs are estimated on a block-by-block...

20060008038 - Adaptive updates in motion-compensated temporal filtering: Techniques and tools are described for scalable video coding and decoding. For example, a video encoder and decoder perform adaptive update operations in lifting-based motion-compensated temporal filtering and inverse motion-compensated temporal filtering, respectively. The encoder, in a prediction stage, computes a motion-compensated prediction for an odd image and computes a...

20060008039 - Method and apparatus for capacity increase and enhanced communications performance in catv networks: In a cable television (CATV) data communication network, channel throughput and communications robustness are increased in a manner that improves speed of data transmission while maintaining compatibility with existing specifications and equipment. Enhanced throughput can be realized using the return channel of the CATV network. Alternatively, data retransmission and/or diversity...

20060008041 - Circuits and methods for recovering a clock signal: A circuit for recovering a clock signal may include a frequency multiplier configured to generate a plurality of local clock signals, each having a different phase, based on a plurality of received global clock signals at a first frequency and each having a different phase. The local clock signals may...

20060008040 - Data recovery circuits using oversampling for maverick edge detection/suppression: A data recovery circuit employing an oversampling technique. The incoming serial data stream with jitter is oversampled by means of the multiple phases of a reference clock to produce data samples. Each sample is compared to the samples collected with the next clock phase in an edge detector circuit to...

20060008042 - Analog unidirectional serial link architecture: The present analog invention is related to a unified digital architecture comprising logic transmitter portions and logic receiver portions. A unified serial link system and method for transmitting digital data across wired media including a transmitter and a receiver portion is provided, one of the transmitter portion and receiver portion...

20060002451 - Frequency-hopped ifdma communication system: Frequency hopping in an IFDMA system takes place by utilizing a time-varying IFDMA modulation code. In particular, a modulator receives a symbol stream and a user specific IFDMA modulation code (bi(t)). The output of the modulator comprises a signal (xi(t)) existing at certain frequencies, or subcarriers. The actual subcarriers that...

20060002452 - Pilot use in orthogonal frequency division multiplexing based spread spectrum multiple access systems: Base station identification and downlink synchronization are realized by employing pilots including known symbols transmitted at prescribed frequency tones in individual ones of prescribed time intervals. Specifically, the symbols used in the pilots are uniquely located in a time-frequency grid, where the locations are specified by periodic pilot tone hopping...

20060002453 - Pilot signals for synchronization and/or channel estimation: The frame words of the preferred embodiment are especially suitable for frame synchronization and/or channel estimation. By adding the autocorrelation and cross-correlation functions of frame words, double maximum values equal in magnitude and opposite polarity at zero and middle shifts are obtained. This property can be used to slot-by-slot, double-check...

20060002455 - Millimeter wave communications system with grid amplifier: A high data rate free space communication link operating at millimeter wave frequency ranges. A quasi-optical grid amplifier is used provide increased transmitter output power. In preferred embodiments that output power is greater than 1 watt. Links include two transceivers, the first transceiver transmitting at a first frequency range and...

20060002454 - System and method for scrambling the phase of the carriers in a multicarrier communications system: A system and method that scrambles the phase characteristic of a carrier signal are described. The scrambling of the phase characteristic of each carrier signal includes associating a value with each carrier signal and computing a phase shift for each carrier signal based on the value associated with that carrier...

20060002456 - Method and apparatus for managing modem sample rates on a digital audio interface within a direct access arrangement circuit: An apparatus for managing modem sample rates within a direct access arrangement (DAA) circuit is disclosed. The DAA circuit includes a serial audio interface for providing communications between the DAA circuit and a host computer system. The serial audio interface is capable of operating under multiple serial communication interface standards,...

20060002458 - Method and apparatus to identify a remote communication apparatus and enhance communication performance based on the identification: A type or brand of remote communication device is identified by measuring one or more characteristics associated with one or more signals sent by the remote communication device. The measured characteristics differ among different devices and/or manufacturers and are compared to known characteristics of one or more signals associated with...

20060002457 - Multi-carrier communication using adaptive tone-pruning: An apparatus, system, and method are described for multi-carrier communication using adaptive tone-pruning. The method may include transmitting a data-bearing signal over a plurality of tones on a communication loop within a plurality of communication loops and calculating a minimum tone cost according to a tone cost algorithm. The tone...

20060002459 - High-efficiency control of radio burst signal transmission system: A radio burst signal transmission system operates to switch between a first control process for optimizing the number of bits added per symbol depending on the probability of successful reception of a successful reception indication signal and a second control process for divisionally sending a burst signal, depending on the...

20060002460 - Method for testing the error ratio of a device using a preliminary probability: A method for testing the (Bit) Error Ratio BER of a device against a maximal allowable (Bit) Error Ratio BERlimit with an early pass and/or early fail criterion, whereby the early pass and/or early fail criterion is allowed to be wrong only by a small probability F for the entire...

20060002461 - External perimeter monitoring system: A system for monitoring activity along a wire-bounded perimeter. The monitoring system includes a single-conductor wire which bounds a protected area. In communication with the wire at predetermined locations is a series of sensors which are either physically or inductively coupled to the wire. The sensors measure activity the wire...

20060002462 - Method and apparatus to control operation of an equalizer: A method and an apparatus to control an equalizer. A signal to noise ratio of an output of the equalizer is measured, the measured signal to noise ratio is fed back to the equalizer controlling apparatus, and convergence information of the equalizer is monitored and at the same time effective...

20060002465 - Method and apparatus for using frame rate up conversion techniques in scalable video coding: A method for encoding a video stream includes partitioning the video stream into a main layer having a plurality of main layer frames, and an interpolated layer having a plurality of interpolated layer frames; interpolating a frame rate up conversion (FRUC) frame; and encoding the plurality of main layer frames...

20060002463 - Method, apparatus and program products for retrieving moving image: An apparatus for retrieving moving image according to the present invention has an extracting unit for extracting the information of the feature quantity of the moving image from the fixed moving image data, an extracting unit for extracting the information of the unique identification of the moving image to identify...

20060002464 - Vsb communication system: A VSB communication system comprises a VSB transmission system and a VSB reception system. The VSB transmission system multiplexes a coded MPEG data and a coded supplemental data having a null sequence inserted therein, with required multiplexing information included in a field synchronization signal or in a supplemental data according...

20060002466 - Prediction encoder/decoder and prediction encoding/decoding method: A prediction encoder/decoder and a prediction encoding/decoding method. The prediction encoder includes a prediction encoding unit starting prediction from a origin macroblock of an area of interest of a video frame, continuing prediction in a direction of ripple scanning with respect to a square ring that includes macroblocks and surrounds...

20060002467 - System, method and computer-readable medium for encoding a signal into macroblocks: A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non linear, piece-wise linear scaling functions to a DC luminance signal, a...

20060002468 - Frame storage method: The memory access efficiency for video decoding is maximized by interleaved storage of luminance and chrominance data. Macroblocks of luminance and chrominance interleave to blocks of 16×32 by repeating chrominance rows....

20060002469 - Method of video data transmitting: A method of video data transmitting by means of video data reconstruction on the receiving end of the communication channel per time unit, based not only on the data, transmitted directly via the channel, but on all previously transmitted, decoded and stored video data....

20060002470 - Motion vector detection circuit, image encoding circuit, motion vector detection method and image encoding method: The vector detecting unit detects a motion vector even for a block that is encoded in the intra mode, and the detected motion vector is stored in the reference vector storing unit. Even for a block that has been encoded in the intra mode, the initial vector calculating unit calculates...

20060002474 - Efficient multi-block motion estimation for video compression: A novel method, system, and apparatus for efficient multi-block motion estimation in a digital signal compression and coding scheme. This invention selects only a few representative block sizes for motion estimation when certain favourable conditions occur, rather than using all available block sizes. This invention produces significantly reduced computational costs...

20060002473 - Motion estimation in video compression systems: Motion estimation in video compressions systems. A programmable motion estimator may be used to estimate a motion vector for a macroblock in a current frame by searching for a matching macroblock in a previous frame. A controller may be used to program the motion estimator to perform a particular search....

20060002471 - Motion estimation unit: Embodiments include a motion estimation unit having a sum of absolute differences (SAD) engine for calculating differences between a reference block of current image pixel data and search windows of prior image pixel data. The reference block is stored in the SAD engine and columns of search window pixel data...

20060002472 - Various methods and apparatuses for motion estimation: Various methods, apparatuses, and systems are described to determine motion estimation. An image processing engine may have a full search motion estimation engine that matches blocks of pixel data from a first video frame to a second video frame in a raster order to determine the motion estimation. The image...

20060002475 - Caching data for video edge filtering: An embodiment of the present invention pertains to an apparatus and method for caching pixel data used in filtering edges of video macroblocks. Pixel data which are required to edge filter subsequent macroblocks are temporarily stored in a cache memory. When a macroblock is subsequently being processed, this cached pixel...

20060002478 - Coding image signal: The present invention relates to a method for encoding a signal of a wireless communication system, the method comprising dividing a current frame of the signal into a plurality of GOBs (Groups of Blocks) each having a certain size, determining whether a current GOB to be encoded of the plurality...

20060002477 - Deblocking filter apparatus and methods using sub-macro-block-shifting register arrays: A register array of a deblocking filter includes a first register configured to store an amount of image data corresponding to a sub-macro block of a macro block to be filtered, a second register configured to store an amount of image data corresponding to a portion of a sub-macro block...

20060002476 - Filter for eliminating discontinuity of block-based encoded image, and method thereof: A method for eliminating discontinuity of block boundaries of an image encoded in units of blocks and an apparatus thereof. A filter for eliminating discontinuity of block boundaries of an image encoded in units of blocks with a predetermined size includes: a vertical edge filtering unit which eliminates the discontinuity...

20060002479 - Decoder for h.264/avc video: A 16-bit fixed-point arithmetic version of the hypothetical reference decoder (HRD) of Annex C of the H.264 standard is derived by modification of the 32-bit floating point timestamps....

20060002480 - Apparatus and method for improved interlace processing: An interlaced image processing module and corresponding method facilitate improved processing of interlaced motion images. In one embodiment, the interlaced image processing module receives image data frames having interlaced first and second fields and produces a reference field and error field. The reference field corresponds to the still image content...

20060002481 - Method and apparatus for multi-threaded variable length coding: A device including a variable length coding unit that includes an input unit connected to a stream switching unit, and an output unit connected to the stream switching unit. The input unit to encode at least two input streams simultaneously. The output unit to transmit output streams to an output...

20060002483 - Lvds receiver for controlling current based on frequency and method of operating the ldvs receiver: In an embodiment, an LVDS (Low Voltage Differential Signaling) receiver includes at least one LVDS input buffer, a clock generating unit, and a bias circuit. The clock generating unit includes a voltage controlled oscillator for generating a clock signal tracking a frequency of data received via the at least one...

20060002482 - Signal drive de-emphasis for memory bus: Apparatus and method to vary the strength with which a signal transmitted by a driver circuit of a transmitting device to a receiving circuit across a conductor such that a transmitted voltage level is driven onto a conductor with a reduced strength where adjacent binary bits values are of the...

20060002484 - Communication system and receiving method: A receiving apparatus in a communication system in which when a systematically encoded signal cannot be decoded correctly on a receiving side, the signal is retransmitted from a transmitting side. The receiving apparatus combines stored data, which has been generated based upon data already received, and newly received data, decides...

20060002486 - Advanced mimo interleaving: A MIMO transmitter including an interleaving system for parsing encoded bits to a plurality of spatial streams and a plurality of interleavers to interleave bits for spatial streams such that at least a first spatial stream uses a first stream interleaver that interleaves with a pattern distinct from a second...

20060002485 - Systems and methods for rapid signal detection and identification: The present invention comprises systems, methods, and devices for detecting the presence of a specified signal type by autocorrelating the signal with a time-delayed copy of itself, by simultaneously crosscorrelating the signal with an expected signal type, and by then comparing the results of the autocorrelation and crosscorrelation to determine...

20060002487 - Methods and apparatus for parametric estimation in a multiple antenna communication system: Methods and apparatus are disclosed for processing received data in a multiple input multiple output (MIMO) communication system. A multiple antenna receiver can distinguish a MIMO transmission from other transmissions based on the detection of a predefined symbol following a legacy portion of a preamble. A preamble comprises a legacy...

20060002488 - Communication device capable of performing broadband radio communication: A communication device includes a communication unit capable of performing radio communications in a broad band including a first band whose frequency is relatively higher and a second band whose frequency is relatively lower. The communication device further includes, for example, a determination unit which determines whether or not a...

20060002489 - Bidirectional optical communications having quick data recovery without first establishing timing and phase lock: A method of transmitting and rapidly recovering a burst of data without first having to establish a timing or phase lock. The signals are transmitted as modified Manchester coded signals having pulse transitions at a clocking pulse rate which is a multiple of the clocking pulse rate at which the...

20060002490 - Receiver for a wire-free communication system: The present invention is directed to a receiver for a wire-free communication system for reception of a received signal which is modulated using a digital modulation method having a first frequency conversion device for production of a frequency-converted received signal by conversion of the received signal to an intermediate frequency....

20060002491 - If fsk receiver: In one embodiment, the present invention is a low-power, and high performance receiver including an IF demodulator for high data rate, frequency modulated systems, such as Bluetooth. The IF demodulator is implemented in analog domain for simplicity and lower power consumption and operates at an IF frequency. An IF demodulator...

20060002492 - Dc-offset compensation: A method of estimating a DC offset value of a signal includes estimating a DC offset value of a preamble part of the signal using a pair of diodes (D1, D2) and a resistor (R) connected in parallel. During receipt of the data part of the signal, the diode pair...

20060002493 - Method and device for generating a duty cycle related output signal: The invention relates to a method and device for discriminating between defined logic states of a data signal received at at least one receiving unit on the basis of a reference voltage. An output signal relating to a duty cycle of an output signal of the receiving unit dependent on...

20060002494 - Analog/digital carrier differentiation in digital cable receivers: A communication signal carrier on a communication channel in a digital cable receiver can be characterized as analog without exhaustively attempting to determine a symbol rate or modulation scheme of a digital carrier. The signal level in the channel is observed at different channel bandwidths, and these observations are used...

20060002495 - Receiver device, communications device, wireless lan device, power control method for a receiver device, power control program for a receiver device, and storage medium: A receiver device in accordance with the present invention (for example, wireless LAN device) includes: a radio frequency signal processor section converting an incoming radio frequency signal to a lower frequency; an RSSI circuit (reception strength sensor section) sensing the signal strength of the radio frequency signal; an intermediate frequency...

20060002496 - Efficient computation of spatial filter matrices for steering transmit diversity in a mimo communication system: Techniques for efficiently computing spatial filter matrices are described. The channel response matrices for a MIMO channel may be highly correlated if the channel is relatively static over a range of transmission spans. In this case, an initial spatial filter matrix may be derived based on one channel response matrix,...

20060002498 - Clock recovery: There is provided a Clock recovery apparatus comprising: an early/late voter for deciding whether a current sampling point needs to be advanced or retarded, wherein said early/late voter passes an Up/Down signal to an interpolator for maintaining a clock signal; a frequency accumulator and rate multiplier 30 for generating further...

20060002497 - Phase adjustment method and circuit for dll-based serial data link transceivers: A delay locked loop circuit with a first flip flop driven by a 0° clock and receiving the input data. A second flip flop by a 180° clock and receiving the input data. A first demultiplexer receives an output of the first flip flop and outputs peak data. A second...

20060002499 - Drift compensation system and method in a clock device of an electronic circuit: A drift compensation system includes a first clock phase alignment circuit adapted for providing an output clock signal which is frequency locked to an input reference clock signal; a second clock phase alignment circuit identical to the first clock phase alignment circuit but wherein the reference clock signal is the...

20060002500 - Method and apparatus for recovering a clock signal: A method includes receiving a serial data signal including a preamble and an embedded clock signal having an embedded clock signal frequency, and processing the preamble using logic to determine the embedded clock signal frequency. An apparatus includes a counter unit, a state machine, and a logic unit. The counter...

20060002501 - Ultra-fast hopping frequency synthesizer for multi-band transmission standards: A system, device, computer program product, and method provide fast frequency hopping. The system includes a terminal and a base station in communication with the terminal to receive an output signal. The terminal includes a communication interface, a processor, and a frequency synthesizer. The processor couples to the communication interface...

20060002502 - Lock system and method for interpolator based receivers: A tracking loop of an interpolator based receiver includes clock elements that generate a plurality of clocks to sample a signal from a remote transmitter. The tracking loop includes samplers and voter elements that sample the signal with the clocks and generate samples that comparatively indicate a phase relationship between...