| 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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| 06/24/1980 | US4209843 Method and apparatus for signal enhancement with improved digital filtering |
| 06/24/1980 | US4209836 Speech synthesis integrated circuit device |
| 06/24/1980 | US4209781 MOS Digital-to-analog converter employing scaled field effect devices |
| 06/11/1980 | EP0011634A1 Voice synthesizer |
| 04/29/1980 | CA1076703A1 Digital speech communication system |
| 03/04/1980 | US4191853 Sampled data filter with time shared weighters for use as an LPC and synthesizer |
| 02/19/1980 | US4189779 Parameter interpolator for speech synthesis circuit |
| 02/05/1980 | US4187397 Device for and method of generating an artificial speech signal |
| 01/22/1980 | US4185169 Synthetic-speech calculators |
| 01/15/1980 | US4184049 Transform speech signal coding with pitch controlled adaptive quantizing |
| 01/08/1980 | US4182930 Detection and monitoring device |
| 01/01/1980 | US4181813 System and method for speech recognition |
| 12/18/1979 | US4179584 Synthetic-speech calculators |
| 11/15/1979 | WO1979000901A1 Predictive speech signal coding with reduced noise effects |
| 11/15/1979 | WO1979000892A1 Voice synthesizer |
| 10/30/1979 | CA1065490A1 Emphasis controlled speech synthesizer |
| 10/17/1979 | EP0004759A2 Methods and apparatus for encoding and constructing signals |
| 10/09/1979 | US4170719 Speech transmission system |
| 07/31/1979 | US4163120 Voice synthesizer |
| 06/19/1979 | US4158751 Analog speech encoder and decoder |
| 06/05/1979 | US4157457 Frequency analyzer comprising a digital band-pass and a digital low-pass filter section both operable in a time-division fashion |
| 03/13/1979 | US4144582 Voice signal processing system |
| 02/27/1979 | US4142071 Quantizing process with dynamic allocation of the available bit resources and device for implementing said process |
| 02/20/1979 | US4140876 Compressed speech system and predictor |
| 01/16/1979 | CA1046642A1 Phase vocoder speech synthesis system |
| 01/09/1979 | US4133976 Predictive speech signal coding with reduced noise effects |
| 12/19/1978 | US4130729 Compressed speech system |
| 10/17/1978 | US4121284 Computerized system for operator interaction |
| 10/17/1978 | US4121058 Voice processor |
| 10/17/1978 | US4121051 Speech synthesizer |
| 10/17/1978 | US4120583 High registration photomask method and apparatus |
| 05/30/1978 | US4092495 Speech synthesizing apparatus |
| 04/25/1978 | US4086431 Compression system |
| 02/28/1978 | US4076958 Signal synthesizer spectrum contour scaler |
| 02/21/1978 | US4075424 Speech synthesizing apparatus |
| 02/21/1978 | US4075423 Sound analyzing apparatus |
| 01/24/1978 | US4070709 Piecewise linear predictive coding system |
| 12/20/1977 | US4064363 Vocoder systems providing wave form analysis and synthesis using fourier transform representative signals |
| 11/29/1977 | US4060848 Electronic calculator system having audio messages for operator interaction |
| 11/15/1977 | US4058676 Speech analysis and synthesis system |
| 09/27/1977 | US4051331 Speech coding hearing aid system utilizing formant frequency transformation |
| 09/13/1977 | US4048443 Digital speech communication system for minimizing quantizing noise |
| 08/30/1977 | US4045616 Vocoder system |
| 07/26/1977 | US4038495 Synthesizer using recursive filters |
| 07/05/1977 | US4034276 Digital signal processor for servo velocity control |
| 05/10/1977 | US4022974 Adaptive linear prediction speech synthesizer |
| 04/26/1977 | US4020332 Interpolation-decimation circuit for increasing or decreasing digital sampling frequency |
| 04/05/1977 | US4016540 Apparatus and method for providing interactive audio communication |
| 01/25/1977 | US4005274 Pulse-code modulation communication system |
| 11/30/1976 | US3995116 Emphasis controlled speech synthesizer |
| 10/12/1976 | US3986022 Illumination control system |
| 09/21/1976 | US3982070 Phase vocoder speech synthesis system |
| 09/07/1976 | US3979557 Speech processor system for pitch period extraction using prediction filters |
| 08/31/1976 | US3978287 Real time analysis of voiced sounds |
| 08/17/1976 | US3975686 Loss signal generation for delta-modulated signals |
| 08/17/1976 | US3975587 Digital vocoder |
| 08/10/1976 | US3974334 Waveform processing |
| 08/03/1976 | US3973081 Feedback residue compression for digital speech systems |
| 05/25/1976 | US3959592 Method and apparatus for transmitting and receiving electrical speech signals transmitted in ciphered or coded form |
| 04/20/1976 | US3952164 Vocoder system using delta modulation |