Patents
Patents for H03M 13 - Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes (37,393)
05/1996
05/01/1996EP0709979A2 Apparatus and method for error correction based on transmission code violations and parity
05/01/1996EP0709847A2 Digital coding and error correction
05/01/1996EP0709846A2 Method of and apparatus for recording and reproducing data and transmitting data
05/01/1996CN1121660A Modulation method, recording method, reproducing method, recording and reproducing apparatus, recording and reproducing method, and reproducing apparatus
04/1996
04/30/1996US5513347 Data transfer system
04/30/1996US5513220 Digital receiver with minimum cost index register
04/24/1996EP0627141A4 High speed modem systems incorporating distribution preserving tomlinson encoding and decoding for secondary channels.
04/23/1996US5511096 Quadrature amplitude modulated data for standard bandwidth television channel
04/23/1996US5511082 Punctured convolutional encoder
04/23/1996US5511081 Method for source-controlled channel decoding by expanding the Viterbi algorithm
04/23/1996US5511080 Playback data detecting method for improving bit error rate for random error
04/23/1996US5511078 Method and apparatus for correction errors in a memory
04/17/1996EP0707425A2 Methods of coding and decoding moving-picture signals, using self-resynchronizing variable-length codes
04/17/1996EP0707402A2 Trellis coded modulation employing lower dimensionality convolutional encoder
04/16/1996US5509031 Method of transmitting and receiving encoded data in a radio communication system
04/16/1996US5509021 Viterbi decoder for decoding error-correcting encoded information symbol string
04/16/1996US5509020 Viterbi decoding apparatus and methods
04/10/1996EP0705510A1 Receiver for a direct sequence spread spectrum orthogonally encoded signal employing rake principle
04/10/1996CN1120269A Apparatus and method for detecting signal points using signal point-mapping
04/09/1996US5506903 Digital multiplex transmission system
04/04/1996DE19526555A1 Dekodierer zum Dekodieren eines kodierten, mehrwertigen Signals unter Verwendung eines Viterbi-Dekodierverfahrens Decoder for decoding a coded multi-valued signal by using a Viterbi decoding method
04/03/1996EP0705002A2 Method for cyclic redundancy code (CRC) checking in asynchronous transfer mode (ATM) packet based networks
04/03/1996EP0704981A1 Apparatus for branch synchronisation in a Viterbi decoder for multidimensional trellis-coded (TCM) signals
04/02/1996US5504761 Apparatus for detecting error in a communications line
04/02/1996US5504758 Error-correcting apparatus
03/1996
03/27/1996EP0703686A2 Maximum likelihood estimation using reference and spontaneous output peaks of partial response equalizer
03/27/1996EP0703675A2 Variable length decoding method and apparatus
03/26/1996US5502736 Viterbi decoder for decoding error-correcting encoded information symbol string
03/26/1996US5502735 Maximum likelihood sequence detector
03/26/1996US5502734 Code transmitting method
03/26/1996US5502732 Method for testing ECC logic
03/26/1996US5502713 Soft error concealment in a TDMA radio system
03/26/1996US5502665 Galois field multiplier
03/21/1996WO1996008905A1 Method for demodulating digitally modulated data signals
03/21/1996WO1996008904A1 Simultaneous demodulation and decoding of a digitally modulated radio signal
03/21/1996WO1996008903A1 Blind equalizing apparatus
03/21/1996WO1996008895A1 Method and apparatus for decoder optimization
03/21/1996WO1996008876A1 A device and method for performing error detection on an interleaved signal portion, and a receiver and decoding method employing such error detection
03/21/1996WO1996008875A1 Multipurpose error correction calculation circuit
03/21/1996WO1996008874A1 Crc/edc checker system
03/21/1996WO1996008873A1 Versatile error correction system
03/21/1996CA2199932A1 Method for demodulating digitally modulated data signals
03/20/1996EP0702476A2 Multilevel weighted transmission method and multilevel weighted transmission and reception apparatus
03/20/1996EP0631703A4 Efficient crc remainder coefficient generation and checking device and method.
03/20/1996CN1119058A Soft error correction in a TDMA radio system
03/19/1996US5500863 CRC operational system
03/13/1996CN1118561A Ethod and circuit arrangement for speech signal transmission
03/13/1996CN1118543A Trellis coding in a simultaneous voice and data system
03/13/1996CN1118540A Apparatus and method for correcting fault
03/13/1996CN1118467A Processing of speech coder parameters in the receiver of a communications system
03/12/1996US5499254 Apparatus for error-correct decoding in a digital data communications system
03/12/1996US5499251 Method of recovering lost bits in a digital transmission
03/12/1996US5499246 Digital radio receiver which detects when a portion of a burst is stolen for a control message
03/07/1996WO1996007254A1 Receiver
03/06/1996EP0700183A2 Method for generation of bit reliability information for a digital transmission system using M-ary orthogonal modulation
03/06/1996EP0700182A1 Apparatus for error correcting decoding in digital data communication systems
03/06/1996EP0700164A1 Signal processing circuit to implement a Viterbi algorithm
03/05/1996US5497401 Branch metric computer for a Viterbi decoder of a punctured and pragmatic trellis code convolutional decoder suitable for use in a multi-channel receiver of satellite, terrestrial and cable transmitted FEC compressed-digital television data
03/05/1996US5497384 Permuted trellis codes for input restricted partial response channels
03/05/1996US5497383 Error detector circuit for receiver operative to receive discretely-encoded signals
02/1996
02/28/1996EP0698329A1 Transmitter and receiver apparatus, method for transmitting and method for receiving and record carrier obtained by the method or the transmitter apparatus
02/28/1996EP0698270A1 Record carrier and device for reading such a record carrier
02/28/1996EP0698269A1 Error correctable data transmission method and device based on semi-cyclic codes
02/27/1996US5495488 Arithmetic circuit having a simple structure for producing an error numeric value polynomial and an error locator polynomial
02/27/1996US5495298 Apparatus for concealing detected erroneous data in a digital image signal
02/22/1996WO1996005593A1 A tuned viterbi detector and equalizer system
02/21/1996EP0697770A1 Arithmetic decoding method
02/21/1996EP0697696A2 Apparatus and method for error correction
02/21/1996CN1117252A Interleaving process
02/20/1996US5493584 Method for determining a channel quality metric in a receiver
02/20/1996CA2030097C Interleaving in coded modulation for mobile radio
02/15/1996WO1996004738A1 Method of and apparatus for interference rejection combining in multi-antenna digital cellular communications systems
02/14/1996EP0696799A1 Digital signal encoding method and apparatus, digital signal recording medium, and digital signal decoding method and apparatus
02/14/1996EP0696798A1 Method and device for recording data, data recording medium, and method and device for reproducing data
02/13/1996US5491772 Methods for speech transmission
02/13/1996US5491705 De bruijn graph based VLSI viterbi decoder
02/13/1996US5491702 Apparatus for detecting any single bit error, detecting any two bit error, and detecting any three or four bit error in a group of four bits for a 25- or 64-bit data word
02/13/1996US5491701 Burst error corrector
02/13/1996US5491700 Method and apparatus for code error correction using an ordered syndrome and error correction lookup table
02/13/1996US5491698 Setting optimal boundary thresholds in a decoder for coded signal processing channels
02/07/1996EP0696108A1 Transmission system and apparatus therefor
02/07/1996EP0695989A1 Inversion circuit for galois field elements
02/07/1996CN1116475A Communication process in a radio telephone system
02/06/1996US5490260 Solid-state RAM data storage for virtual memory computer using fixed-sized swap pages with selective compressed/uncompressed data store according to each data size
02/06/1996US5490178 Power and time saving initial tracebacks
02/06/1996US5490154 Method of and circuit arrangement for decoding RS-coded data signals
02/06/1996US5490150 Method and apparatus for data parity in a transmission system
02/01/1996WO1996002983A1 Generalized direct update viterbi equalizer
02/01/1996WO1996002973A1 Viterbi acs unit with renormalization
02/01/1996CA2195400A1 Generalized direct update viterbi equalizer
01/1996
01/31/1996EP0695052A1 Method for interleaving and de-interleaving of SDH frames and corresponding device
01/31/1996EP0695042A2 Viterbi decoding method and decoder capable of eliminating phase indeterminacy
01/31/1996CN1030878C Error detection system
01/30/1996US5488637 Decoding method and apparatus having optimum decoding paths
01/30/1996US5488633 Intersymbol interference channel coding scheme
01/30/1996US5488617 Data processor system based on an (n, k) symbol code having symbol error correctibility and plural error mendability
01/30/1996US5488616 System for providing reversible variable length codes
01/30/1996CA2154848A1 Multilevel weighted transmission method and multilevel weighted transmission and reception apparatus
01/25/1996WO1996002100A1 Trellis coded modulation system for hdtv
01/25/1996WO1996002091A1 Method and apparatus for speech transmission in a mobile communications system