| 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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| 02/07/1991 | WO1991001545A1 Digital speech coder with vector excitation source having improved speech quality |
| 02/06/1991 | EP0411655A2 Vector quantization encoder and vector quantization decoder |
| 02/05/1991 | US4991215 Speech processing apparatus |
| 02/05/1991 | US4991214 Speech coding using sparse vector codebook and cyclic shift techniques |
| 01/29/1991 | US4989247 Method and system for determining the variation of a speech parameter, for example the pitch, in a speech signal |
| 01/29/1991 | US4989246 Adaptive differential, pulse code modulation sound generator |
| 01/23/1991 | EP0409239A2 Speech coding/decoding method |
| 01/22/1991 | CA1279404C Digital speech coder having improved vector excitation source |
| 01/15/1991 | US4985923 High efficiency voice coding system |
| 01/09/1991 | CN1048473A Digital transmission system transmitter and receiver for use in transmission system, and record carrier obtained by means of transmitter in form of recording device |
| 01/02/1991 | EP0405584A2 Gain-shape vector quantization apparatus |
| 01/02/1991 | EP0405572A2 Voice coding/decoding system |
| 01/02/1991 | EP0405548A2 System for speech coding and apparatus for the same |
| 01/02/1991 | EP0405029A1 Speech communication system and method |
| 01/02/1991 | EP0245363B1 Analog signal encoding and decoding apparatus and methods |
| 01/02/1991 | CN1048278A Digital speech coder with vector excitation source having improved speech quality |
| 01/01/1991 | US4982285 Apparatus for adaptive inter-frame predictive encoding of video signal |
| 12/25/1990 | US4980916 Method for improving speech quality in code excited linear predictive speech coding |
| 12/19/1990 | EP0403154A2 Vector quantizer search arrangement |
| 12/19/1990 | EP0402973A1 Digital transmission system, transmitter and receiver for use in the transmission system, and record carrier obtained by means of the transmitter in the form of a recording device |
| 12/19/1990 | EP0402947A2 Arrangement and method for encoding speech signal using regular pulse excitation scheme |
| 12/12/1990 | EP0401452A1 Low-delay low-bit-rate speech coder |
| 12/05/1990 | EP0400755A1 Digital transmission system using subband coding of a digital signal |
| 12/05/1990 | EP0400222A1 Digital transmission system using subband coding of a digital signal |
| 12/04/1990 | US4975959 Speaker independent speech recognition process |
| 12/04/1990 | US4975958 Coded speech communication system having code books for synthesizing small-amplitude components |
| 12/04/1990 | US4975957 Character voice communication system |
| 12/04/1990 | US4975956 Low-bit-rate speech coder using LPC data reduction processing |
| 12/04/1990 | US4975955 Pattern matching vocoder using LSP parameters |
| 12/02/1990 | CA2475414A1 Decoder, receiver and method for decoding an encoded digital audio signal |
| 11/27/1990 | CA1277034C2 Formant pattern matching vocoder |
| 11/21/1990 | CN1047157A Excitation pulse positioning method in a linear predictive speech coder |
| 11/20/1990 | US4972484 Method of transmitting or storing masked sub-band coded audio signals |
| 11/18/1990 | CA2016462A1 Hybrid switched multi-pulse/stochastic speech coding technique |
| 11/15/1990 | WO1990013971A1 Signal-processing system for digital signals |
| 11/15/1990 | WO1990013966A1 Partial information transmission for data base inquiry |
| 11/14/1990 | EP0397628A1 Excitation pulse positioning method in a linear predictive speech coder |
| 11/14/1990 | EP0397564A2 Method and apparatus for coding audio signals |
| 11/13/1990 | US4970659 Learning aid or game having miniature electronic speech synthesis chip |
| 11/12/1990 | WO1990013891A1 Excitation pulse positioning method in a linear predictive speech coder |
| 11/07/1990 | EP0396121A1 A system for coding wide-band audio signals |
| 11/06/1990 | US4969193 Method and apparatus for generating a signal transformation and the use thereof in signal processing |
| 11/06/1990 | US4969192 Vector adaptive predictive coder for speech and audio |
| 11/01/1990 | WO1990013112A1 Voice encoder |
| 11/01/1990 | WO1990013111A1 Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals |
| 11/01/1990 | WO1990013110A1 Adaptive transform coder having long term predictor |
| 10/31/1990 | EP0395440A2 Apparatus for adaptive interframe predictive encoding of video signal |
| 10/31/1990 | EP0395076A2 Speech coding apparatus |
| 10/31/1990 | DE3914267A1 Signalverarbeitungssystem fuer digitalsignale A signal processing system for digital signals |
| 10/24/1990 | EP0393614A1 Speech coding and decoding apparatus |
| 10/23/1990 | US4965789 Multi-rate voice encoding method and device |
| 10/17/1990 | EP0392517A2 Speech coding apparatus |
| 10/17/1990 | EP0392126A1 Fast pitch tracking process for LTP-based speech coders |
| 10/16/1990 | US4964169 Method and apparatus for speech coding |
| 10/16/1990 | US4964168 Circuit for storing a speech signal in a digital speech memory |
| 10/16/1990 | US4964166 Adaptive transform coder having minimal bit allocation processing |
| 10/16/1990 | US4963034 Low-delay vector backward predictive coding of speech |
| 10/10/1990 | EP0390975A1 Encoder Device capable of improving the speech quality by a pair of pulse producing units |
| 10/09/1990 | US4962536 Multi-pulse voice encoder with pitch prediction in a cross-correlation domain |
| 10/04/1990 | WO1990011657A1 Optical wavelength communication system and method of using same |
| 10/04/1990 | WO1990011593A1 Method and apparatus for speech analysis |
| 10/03/1990 | EP0236349B1 Digital speech coder with different excitation types |
| 10/02/1990 | US4961228 Method of and device for encoding a signal, for example a speech parameter such as the pitch, as a function of time |
| 10/02/1990 | US4961160 Linear predictive coding analysing apparatus and bandlimiting circuit therefor |
| 09/25/1990 | US4959866 Speech synthesizer using shift register sequence generator |
| 09/19/1990 | EP0388104A2 Method for speech analysis and synthesis |
| 09/18/1990 | US4958158 Modem with noise-reducing decoder in demodulation of encoded binary pulse signals representative of constant amplitude signals |
| 09/11/1990 | US4956871 Improving sub-band coding of speech at low bit rates by adding residual speech energy signals to sub-bands |
| 09/05/1990 | EP0385799A2 Speech signal processing method |
| 09/04/1990 | US4954951 System and method for increasing memory performance |
| 08/29/1990 | EP0384587A1 Voice synthesizing apparatus |
| 08/23/1990 | WO1990009656A1 Speech processing machine |
| 08/09/1990 | WO1990009064A1 Low time-delay transform coder, decoder, and encoder/decoder for high-quality audio |
| 08/09/1990 | WO1990009022A1 Low bit rate transform coder, decoder and encoder/decoder for high-quality audio |
| 08/07/1990 | US4946391 Electronic arithmetic learning aid with synthetic speech |
| 08/02/1990 | WO1990009063A1 Process for transmitting a signal |
| 08/01/1990 | EP0379587A1 Encoder/decoder apparatus. |
| 07/31/1990 | US4945567 Method and apparatus for speech-band signal coding |
| 07/31/1990 | US4945565 Low bit-rate pattern encoding and decoding with a reduced number of excitation pulses |
| 07/25/1990 | EP0379296A2 A low-delay code-excited linear predictive coder for speech or audio |
| 07/24/1990 | US4944036 Signature filter system |
| 07/24/1990 | US4944013 Multi-pulse speech coder |
| 07/18/1990 | EP0152430B1 Apparatus and methods for coding, decoding, analyzing and synthesizing a signal |
| 07/17/1990 | US4942607 Method of transmitting an audio signal |
| 07/17/1990 | US4942516 Single chip integrated circuit computer architecture |
| 06/27/1990 | EP0375551A2 A speech coding/decoding system |
| 06/27/1990 | EP0374941A2 Communication system capable of improving a speech quality by effectively calculating excitation multipulses |
| 06/26/1990 | US4937873 Computationally efficient sine wave synthesis for acoustic waveform processing |
| 06/26/1990 | US4937868 Speech analysis-synthesis system using sinusoidal waves |
| 06/19/1990 | CA1270568A1 Formant pattern matching vocoder |
| 06/13/1990 | EP0372601A1 Coder for incorporating extra information in a digital audio signal having a predetermined format, decoder for extracting such extra information from a digital signal, device for recording a digital signal on a record carrier, comprising such a coder, and record carrier obtained by means of such a device |
| 06/12/1990 | US4933957 Low bit rate voice coding method and system |
| 06/12/1990 | CA1270331A1 Digital speech coder with different excitation types |
| 06/06/1990 | EP0371035A1 Method for error correction in digitally encoded speech |
| 06/06/1990 | EP0371032A1 Protection of energy information in sub-band coding |
| 06/05/1990 | US4932061 Multi-pulse excitation linear-predictive speech coder |
| 05/23/1990 | DE3938312A1 Generating source audio data |
| 05/15/1990 | US4926488 Normalization of speech by adaptive labelling |
| 05/15/1990 | CA1269135A1 Sub-band coders, decoders and filters |
| 05/08/1990 | US4924519 Fast access digital audio message system and method |