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

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)
05/1988
05/03/1988	US4742550 Residual excited linear predictive coder
05/03/1988	CA1236169A1 Method of and device for correcting burst errors on low bit rate coded speech signals transmitted on radio communication channels
04/1988
04/26/1988	US4741037 System for the transmission of speech through a disturbed transmission path
04/26/1988	US4740906 Digital lattice filter with multiplexed fast adder/full adder for performing sequential multiplication and addition operations
04/19/1988	US4739396 Projection display system
04/05/1988	US4736428 Multi-pulse excited linear predictive speech coder
03/1988
03/24/1988	WO1988002165A1 Method of speech coding
03/16/1988	EP0260053A1 Digital speech vocoder
03/16/1988	EP0259950A1 Digital speech sinusoidal vocoder with transmission of only a subset of harmonics
03/16/1988	EP0259553A2 Table controlled dynamic bit allocation in a variable rate sub-band speech coder
03/15/1988	US4731846 Voice messaging system with pitch tracking based on adaptively filtered LPC residual signal
03/10/1988	WO1988001811A1 Digital coding process
03/03/1988	DE3629823A1 Device for outputting voice without mechanical parts
03/03/1988	DE3629434A1 Digitales codierverfahren Digital coding
02/1988
02/24/1988	EP0256081A1 Improvements in or relating to acoustic recognition.
02/16/1988	US4726037 Predictive communication system filtering arrangement
02/10/1988	EP0255524A1 Method and apparatus for synthesizing speech without voicing or pitch information.
02/09/1988	US4724535 Low bit-rate pattern coding with recursive orthogonal decision of parameters
02/03/1988	EP0140957A4 Audio digital recording and playback system.
01/1988
01/28/1988	WO1988000754A1 Method and system for compressing speech signal data
01/28/1988	DE3719954A1 Verfahren zur bestimmung der zeitlichen aenderung mehrerer spektrallinien von signalverlaeufen Method for the determination of the temporal aenderung several spectral lines of signalverlaeufen
01/19/1988	USRE32580 Digital speech coder
01/19/1988	US4720865 Multi-pulse type vocoder
01/19/1988	US4720861 Digital speech coding circuit
01/05/1988	US4717261 Recording/reproducing apparatus including synthesized voice converter
12/1987
12/29/1987	US4716592 Method and apparatus for encoding voice signals
12/22/1987	CA1230682A1 Encoder capable of removing interaction between adjacent frames
12/02/1987	EP0128065B1 Method of generating an excitation signal for a channel or linear prediction vocoder, and excitation signal generator therefor
12/01/1987	US4710960 Speech-adaptive predictive coding system having reflected binary encoder/decoder
12/01/1987	US4710959 Voice encoder and synthesizer
11/1987
11/25/1987	EP0215915A4 Processing of acoustic waveforms.
11/24/1987	US4709390 Speech message code modifying arrangement
11/24/1987	US4709340 Digital speech synthesizer
11/24/1987	CA1229681A1 Method and apparatus for speech-band signal coding
11/19/1987	EP0245363A1 Analog signal encoding and decoding apparatus and methods.
11/19/1987	EP0124411B1 Channel vocoder comprising means for suppressing parasitic modulation of the synthesized speech signal
11/17/1987	US4707858 Utilizing word-to-digital conversion
11/05/1987	WO1987006783A1 Method and device for recording and reading of numerical sound information signals
11/04/1987	EP0243562A1 Improved voice coding process and device for implementing said process
11/03/1987	US4704730 Multi-state speech encoder and decoder
10/1987
10/27/1987	US4703505 Speech data encoding scheme
10/20/1987	US4701955 Variable frame length vocoder
10/20/1987	US4701954 Multipulse LPC speech processing arrangement
10/20/1987	US4701953 Signal compression system
10/20/1987	US4701943 Paging system using LPC speech encoding with an adaptive bit rate
10/20/1987	US4701862 Audio output device with speech synthesis technique
10/14/1987	EP0241170A1 Adaptive speech feature signal generation arrangement
10/14/1987	EP0139803B1 Method of recovering lost information in a digital speech transmission system, and transmission system using said method
10/06/1987	US4698776 Recording/reproducing apparatus
09/1987
09/23/1987	EP0237561A1 Audio and video digital recording and playback system
09/22/1987	US4696038 Voice messaging system with unified pitch and voice tracking
09/22/1987	US4695970 Linear predictive coding technique with interleaved sequence digital lattice filter
09/16/1987	EP0236445A1 Capacity expander for telephone line
09/16/1987	EP0236349A1 Digital speech coder with different excitation types.
09/15/1987	CA1226947A1 Speech signal coding and/or decoding system
09/15/1987	CA1226946A1 Low bit-rate pattern coding with recursive orthogonal decision of parameters
09/09/1987	EP0235180A1 Voice synthesis utilizing multi-level filter excitation.
09/08/1987	CA1226676A1 Speech message code modifying arrangement
09/01/1987	US4691359 Speech synthesizer with repeated symmetric segment
08/1987
08/27/1987	DE3605690A1 Speaking postcard
08/26/1987	EP0071716B1 Allophone vocoder
08/19/1987	EP0232456A1 Digital speech processor using arbitrary excitation coding
08/18/1987	US4688224 Method of and device for correcting burst errors on low bit-rate coded speech signals transmitted on radio-communication channels
08/18/1987	CA1225758A1 Secure voice transmission
08/13/1987	WO1987004836A1 Improvements in or relating to acoustic recognition
08/11/1987	US4686655 Filtering system for processing signature signals
08/11/1987	US4686644 Linear predictive coding technique with symmetrical calculation of Y-and B-values
08/11/1987	US4686622 Computer system architecture using serial communication
07/1987
07/29/1987	EP0230001A1 Method of and device for speech signal coding and decoding by subband analysis and vector quantization with dynamic bit allocation
07/21/1987	US4682368 Mobile radio data communication system using a speech recognition technique
07/21/1987	US4682248 Audio and video digital recording and playback system
07/16/1987	WO1987004293A1 Method and apparatus for synthesizing speech without voicing or pitch information
07/01/1987	EP0226590A1 Analyzer for speech in noise prone environments
06/1987
06/23/1987	CA1223365A1 Method and apparatus for speech coding
06/16/1987	US4673916 Method and system for decoding a digital signal using a variable frequency low-pass filter
06/16/1987	US4672875 Waveshape memory for an electronic musical instrument
06/16/1987	CA1223073A1 Digital speech coder with baseband residual coding
06/09/1987	US4672670 Apparatus and methods for coding, decoding, analyzing and synthesizing a signal
06/09/1987	US4672457 Scanner system
06/02/1987	CA1222569A1 System for the processing of speech signals to extract desired information therefrom
06/02/1987	CA1222568A1 Multipulse lpc speech processing arrangement
05/1987
05/27/1987	EP0223014A1 Reference speech pattern generating method
05/26/1987	US4669120 Low bit-rate speech coding with decision of a location of each exciting pulse of a train concurrently with optimum amplitudes of pulses
05/21/1987	WO1987003128A1 Analog signal encoding and decoding apparatus and methods
05/19/1987	US4667340 Voice messaging system with pitch-congruent baseband coding
04/1987
04/28/1987	US4661915 Allophone vocoder
04/08/1987	EP0109179B1 Apparatus for processing document data including voice data
04/07/1987	EP0203940A4 Relp vocoder implemented in digital signal processors.
04/01/1987	EP0215915A1 Processing of acoustic waveforms
04/01/1987	EP0048835B1 Electronic teaching apparatus
03/1987
03/31/1987	US4654863 Wideband adaptive prediction
03/31/1987	CA1219954A1 Low bit-rate speech coding with decision of a location of each exciting pulse of a train concurrently with optimum amplitudes of pulses
03/26/1987	WO1987001851A1 Audio and video digital recording and playback system
03/18/1987	EP0037493B1 Voice analyzing apparatus
03/12/1987	WO1987001542A1 Capacity expander for telephone line
03/12/1987	WO1987001500A1 Voice synthesis utilizing multi-level filter excitation
03/12/1987	WO1987001499A1 Digital speech coder with different excitation types
03/12/1987	DE3532259A1 Greetings card with integrated microprocessor and digital memory as sound recording medium
03/10/1987	CA1219079A1 Multi-pulse type vocoder
03/04/1987	EP0212323A2 Method and apparatus for generating a signal transformation and the use thereof in signal processings

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