| Patents for G10L 19 - Speech or audio signal analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis (31,960) |
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| 09/07/1993 | US5243685 Method and device for the coding of predictive filters for very low bit rate vocoders |
| 09/01/1993 | EP0557940A2 Speech coding system |
| 08/31/1993 | US5241650 Digital speech decoder having a postfilter with reduced spectral distortion |
| 08/31/1993 | US5241603 Digital signal encoding apparatus |
| 08/25/1993 | EP0556354A1 Error protection for multimode speech coders |
| 08/25/1993 | CN1021938C Method for controlling coder with code excitation signal and apparatus thereof |
| 08/24/1993 | CA1321646C Coded speech communication system having code books for synthesizing small-amplitude components |
| 08/24/1993 | CA1321645C Method and system for voice coding based on vector quantization |
| 08/18/1993 | EP0555233A1 Greeting card with electronic sound recording. |
| 08/18/1993 | EP0496829A4 Lpc based speech synthesis with adaptive pitch prefilter |
| 08/11/1993 | EP0283277B1 System for synthesizing speech |
| 08/10/1993 | US5235671 Dynamic bit allocation subband excited transform coding method and apparatus |
| 08/10/1993 | US5235670 Multiple impulse excitation speech encoder and decoder |
| 08/10/1993 | US5235669 Low-delay code-excited linear-predictive coding of wideband speech at 32 kbits/sec |
| 08/10/1993 | US5235623 Adaptive transform coding by selecting optimum block lengths according to variatons between successive blocks |
| 08/05/1993 | WO1993015562A1 Error protection in a subband coder |
| 08/05/1993 | WO1993015503A1 Double mode long term prediction in speech coding |
| 08/05/1993 | WO1993015502A1 Method and system for the arrangement of vocoder data for the masking of transmission channel induced errors |
| 08/05/1993 | DE4202654A1 Error detection in digital transmission of audio signals - identifying erroneous jumps in level of signal by deviation from value in statistically more probable sequence |
| 08/05/1993 | CA2106390A1 Double mode long term prediction in speech coding |
| 08/03/1993 | US5233660 Method and apparatus for low-delay celp speech coding and decoding |
| 08/03/1993 | US5233659 Method of quantizing line spectral frequencies when calculating filter parameters in a speech coder |
| 08/03/1993 | CA1321025C Speech signal coding/decoding system |
| 07/29/1993 | DE4202140A1 Digital audio signal transmission using sub-band coding - inserting extra fault protection signal, or fault protection bit into data frame |
| 07/28/1993 | EP0552927A2 Waveform prediction method for acoustic signal and coding/decoding apparatus therefor |
| 07/28/1993 | EP0552781A2 Voice signal communication with burst error reduction |
| 07/27/1993 | US5231669 Low bit rate voice coding method and device |
| 07/27/1993 | US5231485 Method and apparatus for transforming between fixed-rate vector quantized data and variable rate vector quantized data |
| 07/22/1993 | WO1993014492A1 Method and apparatus for encoding, decoding and compression of audio-type data |
| 07/22/1993 | CA2087585A1 Voice signal communication with burst error reduction |
| 07/21/1993 | EP0551705A2 Method for subbandcoding using synthetic filler signals for non transmitted subbands |
| 07/21/1993 | EP0336658B1 Vector quantization in a harmonic speech coding arrangement |
| 07/21/1993 | EP0255524B1 Method and apparatus for synthesizing speech without voicing or pitch information |
| 07/20/1993 | US5230038 Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio |
| 07/20/1993 | US5230037 Phonetic hidden markov model speech synthesizer |
| 07/20/1993 | US5230036 Speech coding system utilizing a recursive computation technique for improvement in processing speed |
| 07/14/1993 | EP0550657A1 A method of, and system for, coding analogue signals. |
| 07/13/1993 | US5228086 Speech encoding apparatus and related decoding apparatus |
| 07/13/1993 | US5227788 Method and apparatus for two-component signal compression |
| 07/07/1993 | EP0549699A1 Methods for speech analysis and synthesis |
| 07/07/1993 | EP0549633A1 Improved memory system |
| 07/06/1993 | US5226108 Processing a speech signal with estimated pitch |
| 07/06/1993 | US5226085 Method of transmitting, at low throughput, a speech signal by celp coding, and corresponding system |
| 07/06/1993 | US5226084 Methods for speech quantization and error correction |
| 07/06/1993 | US5226083 Communication apparatus for speech signal |
| 07/01/1993 | WO1993000779A1 An improved multiband programmable compression system |
| 07/01/1993 | EP0570362A4 Digital speech decoder having a postfilter with reduced spectral distortion. |
| 07/01/1993 | CA2111829A1 Multiband programmable compression system |
| 06/29/1993 | US5224167 Speech coding apparatus using multimode coding |
| 06/24/1993 | WO1993012599A1 Embedded signalling |
| 06/22/1993 | US5222189 Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio |
| 06/22/1993 | US5222146 Speech recognition apparatus having a speech coder outputting acoustic prototype ranks |
| 06/16/1993 | EP0340301B1 Digital adaptive transform coding process |
| 06/09/1993 | EP0545416A2 Recording/reproducing apparatus of a semiconductor memory that can carry out recording and reproduction simultaneously |
| 06/09/1993 | EP0545403A2 Speech signal encoding system capable of transmitting a speech signal at a low bit rate |
| 06/09/1993 | EP0545386A2 Method for speech coding and voice-coder |
| 06/09/1993 | EP0545083A2 A speech coding apparatus having speaker dependent prototypes generated from nonuser reference data |
| 06/08/1993 | US5218561 Fast calculation apparatus for carrying out a forward and an inverse transform |
| 06/08/1993 | US5218560 Circuit for controlling tap gains at rapid speed in an adaptive filter |
| 06/08/1993 | CA1318976C Digital speech processor using arbitrary excitation coding |
| 06/01/1993 | US5216747 Voiced/unvoiced estimation of an acoustic signal |
| 06/01/1993 | US5216745 Sound synthesizer employing noise generator |
| 05/27/1993 | WO1993011530A1 Prioritization method and device for speech frames coded by a linear predictive coder |
| 05/27/1993 | WO1993010637A1 Method and apparatus for transforming between fixed-rate and variable rate vector quantized data |
| 05/26/1993 | EP0543700A2 Method for quantification of speed signal energy in a low bit rate vocoder |
| 05/26/1993 | CN1020975C Excitation pulse positioning method in a linear predictive speech coder |
| 05/25/1993 | US5214742 Method for transmitting a signal |
| 05/25/1993 | US5214741 Variable bit rate coding system |
| 05/25/1993 | US5214706 Method of coding a sampled speech signal vector |
| 05/25/1993 | US5214678 Digital transmission system using subband coding of a digital signal |
| 05/23/1993 | CA2083335A1 Method for the quantification of the energy of the speech signal in a vocoder with very low bit rate |
| 05/19/1993 | EP0542585A2 Predictive filter quantification method for low bit rate vocoder |
| 05/19/1993 | EP0516701A4 Video telephone system |
| 05/11/1993 | USRE34247 Digital speech processor using arbitrary excitation coding |
| 05/07/1993 | CA2081693A1 Speech segment coding and pitch control methods for speech synthesis systems |
| 05/05/1993 | EP0540330A2 Procedure for decoding an audio signal in which other information has been included in said audiosignal by making use of masking effect |
| 05/05/1993 | EP0484339A4 Digital speech coder with vector excitation source having improved speech quality |
| 05/05/1993 | CN1071769A Method for encoding and decoding human speech signal |
| 05/04/1993 | US5208863 Generating code information |
| 05/04/1993 | US5208862 Speech coder |
| 04/29/1993 | WO1993008651A1 Process for reducing frequency interlacing during acoustic or optical signal transmission and/or recording |
| 04/28/1993 | EP0539103A2 Generalized analysis-by-synthesis speech coding method and apparatus |
| 04/28/1993 | EP0538877A2 Voice coder/decoder and methods of coding/decoding |
| 04/28/1993 | EP0538626A2 Speech recognition apparatus having a speech coder outputting acoustic prototype ranks |
| 04/27/1993 | US5206884 Transform domain quantization technique for adaptive predictive coding |
| 04/22/1993 | DE4229654A1 Audio and video signal transmission with error correction - protects data groups with bit quantity fluctuating between frames by sorting data bits w.r.t. their importance and distributing bit groups homogeneously within frame |
| 04/21/1993 | EP0537948A2 Method and apparatus for smoothing pitch-cycle waveforms |
| 04/21/1993 | EP0537361A1 High efficiency digital data encoding and decoding apparatus. |
| 04/21/1993 | EP0256081B1 Improvements in or relating to acoustic recognition |
| 04/14/1993 | EP0536792A2 Audio sound recording/reproducing apparatus using semiconductor memory |
| 04/14/1993 | CN1071036A Variable rate vocoder |
| 04/13/1993 | US5202953 Multi-pulse type coding system with correlation calculation by backward-filtering operation for multi-pulse searching |
| 04/07/1993 | EP0535380A2 Speech coding apparatus |
| 04/02/1993 | EP0570365A4 Digital speech coder having optimized signal energy parameters. |
| 04/01/1993 | WO1993006592A1 A linear prediction speech coding device |
| 04/01/1993 | WO1993006590A1 A speech coding device |
| 03/31/1993 | EP0534442A2 Code-book driven vocoder device with voice source generator |
| 03/30/1993 | US5199076 Speech coding and decoding system |
| 03/24/1993 | EP0533614A2 Speech synthesis using perceptual linear prediction parameters |
| 03/23/1993 | CA1314994C Resisting the effects of channel noise in digital transmission of information |