Patents
Sitemap › G10 - Musical instruments; Acoustics › G10L - Speech analysis or synthesis; Speech recognition; Speech or voice processing; Speech or audio coding or decoding › G10L 21 - Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
Patents for G10L 21 - Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility (18,985)
04/1991
04/30/1991US5012519 Noise reduction system
04/30/1991US5012517 Adaptive transform coder having long term predictor
04/16/1991CA1282954C Speech synchronized animation
04/09/1991US5007094 Multipulse excited pole-zero filtering approach for noise reduction
02/1991
02/21/1991WO1991002324A1 Adaptive network for in-band signal separation
02/06/1991EP0411360A1 Method and apparatus for interference suppression in speech signals
01/1991
01/30/1991EP0410045A1 Image audio transformation system, particularly as a visual aid for the blind
01/15/1991US4985923 High efficiency voice coding system
12/1990
12/11/1990CA1277720C Method for enhancing the quality of coded speech
11/1990
11/29/1990WO1990014739A1 Analysis of waveforms
11/29/1990WO1990014656A1 Apparatus and methods for the generation of stabilised images from waveforms
11/22/1990DE4015381A1 Spracherkennungsgeraet und verfahren zur spracherkennung Spracherkennungsgeraet and methods for speech recognition
11/14/1990EP0397399A2 Voice verification circuit for validating the identity of telephone calling card customers
11/01/1990WO1990013111A1 Methods and apparatus for reconstructing non-quantized adaptively transformed voice signals
11/01/1990WO1990013110A1 Adaptive transform coder having long term predictor
10/1990
10/25/1990DE4012349A1 Noise elimination device for speech recognition system - uses spectral subtraction of sampled noise values from sampled speech values
10/24/1990EP0393614A1 Speech coding and decoding apparatus
10/17/1990EP0392049A1 Method for expanding or compressing a time signal
10/03/1990EP0390037A2 Pitch shift apparatus
09/1990
09/25/1990US4959865 A method for indicating the presence of speech in an audio signal
09/12/1990EP0386765A2 Method of detecting acoustic signal
08/1990
08/08/1990EP0380563A1 Improved noise suppression system
07/1990
07/24/1990US4944014 Method for synthesizing echo effect from digital speech data
06/1990
06/19/1990US4935963 Method and apparatus for processing speech signals
06/05/1990US4932063 Noise suppression apparatus
05/1990
05/23/1990DE3938311A1 Source audio data generator
05/16/1990EP0367803A1 Noise reduction.
05/15/1990US4926488 Normalization of speech by adaptive labelling
05/02/1990EP0366192A2 Textprocessing arrangement
04/1990
04/11/1990EP0362315A1 Device for monitoring acoustic signal processing systems.
04/03/1990US4914701 Method and apparatus for encoding speech
04/03/1990US4914692 Automatic speech recognition using echo cancellation
04/03/1990US4913539 Apparatus and method for lip-synching animation
03/1990
03/27/1990US4912767 Distributed noise cancellation system
03/15/1990DE3929481A1 Noise reduction equipment in speech signal processing system - couples microphones by hierarchical neuronal networks to digital processor
02/1990
02/27/1990US4905286 Noise compensation in speech recognition
01/1990
01/03/1990EP0348888A2 Overflow speech detecting apparatus
01/03/1990EP0348396A1 Radio receiver speech amplifier circuit.
12/1989
12/26/1989US4890325 Speech coding transmission equipment
12/05/1989US4884972 Speech synchronized animation
11/1989
11/21/1989CA1263187A1 Image encoding and synthesis
11/14/1989US4881266 Speech recognition system
11/07/1989US4879699 Audio output device
11/02/1989EP0339891A2 Speech processing apparatus
09/1989
09/20/1989EP0332890A2 Cancellation of noise from a noise-degraded voice signal
09/19/1989US4868687 Audio editor display interface
09/19/1989CA1259663A1 Noise canceling system
09/12/1989CA1259410A1 Apparatus for making and editing dictionary entries in a text-to-speech conversion system
09/08/1989WO1989008357A1 Device for monitoring acoustic signal processing systems
09/05/1989US4864626 Voice modifier
09/05/1989US4864620 Method for performing time-scale modification of speech information or speech signals
08/1989
08/23/1989EP0126420B1 A speech recognition system
07/1989
07/27/1989WO1989006877A1 Noise reduction
07/25/1989US4852169 Method for enhancing the quality of coded speech
06/1989
06/28/1989EP0322100A2 System and method for processing digitized audio signals
06/20/1989US4841575 Image encoding and synthesis
06/13/1989US4839923 Method and apparatus for time companding an analog signal
06/06/1989US4837828 Pattern feature extracting system
05/1989
05/24/1989EP0235127B1 Hands-free control system for a radiotelephone
05/23/1989US4833716 Speech waveform analyzer and a method to display phoneme information
05/23/1989US4833711 Speech recognition system with generation of logarithmic values of feature parameters
05/16/1989US4831654 Apparatus for making and editing dictionary entries in a text to speech conversion system
04/1989
04/26/1989EP0312569A1 Method and apparatus for improving voice intelligibility in high noise environments.
04/25/1989US4825384 Speech recognizer
04/18/1989US4823380 Voice changer
04/06/1989WO1989003141A1 Improved noise suppression system
03/1989
03/28/1989US4817161 Variable speed speech synthesis by interpolation between fast and slow speech data
03/28/1989US4817158 Normalization of speech signals
03/07/1989US4811404 For attenuating the background noise
02/1989
02/21/1989CA1250348A1 Adaptive noise suppressor
02/01/1989EP0301199A1 Normalization of speech by adaptive labelling
01/1989
01/31/1989US4802228 Amplifier filter system for speech therapy
12/1988
12/20/1988US4792975 Digital speech signal processing for pitch change with jump control in accordance with pitch period
12/06/1988US4790016 Adaptive method and apparatus for coding speech
10/1988
10/26/1988EP0287741A1 Process for varying speech speed and device for implementing said process
10/20/1988WO1988008227A1 Method and apparatus for improving voice intelligibility in high noise environments
10/12/1988EP0286035A1 Speech-recognition circuitry employing phoneme Estimation
09/1988
09/13/1988US4771472 Method and apparatus for improving voice intelligibility in high noise environments
08/1988
08/30/1988US4768086 Color display apparatus for displaying a multi-color visual pattern derived from two audio signals
08/24/1988EP0279451A2 Speech coding transmission equipment
07/1988
07/27/1988EP0275416A1 Method for enhancing the quality of coded speech
07/26/1988CA1239701A1 Method and apparatus for encoding speech
07/14/1988WO1988005226A1 Radio receiver speech amplifier circuit
07/12/1988US4757540 Method for audio editing
07/12/1988US4757517 System for transmitting voice signal
06/1988
06/14/1988EP0226613A4 Noise supression system.
05/1988
05/24/1988US4747143 Speech enhancement system having dynamic gain control
04/1988
04/12/1988US4737976 Hands-free control system for a radiotelephone
03/1988
03/29/1988US4734795 Apparatus for reproducing audio signal
02/1988
02/02/1988US4723294 Noise canceling system
02/02/1988CA1232357A1 Data compression method and apparatus
01/1988
01/28/1988EP0208712A4 Adaptive method and apparatus for coding speech.
01/26/1988US4722009 Tone restoring apparatus
01/26/1988US4721923 Radio receiver speech amplifier circuit
01/20/1988EP0253751A2 Graphics and sound generating electronic systems
01/05/1988US4718096 Speech recognition system
12/1987
12/29/1987US4716591 Speech synthesis method and device
12/29/1987US4716472 Variable speed replay of digital audio with constant output sampling rate
12/09/1987EP0248593A1 Preprocessing system for speech recognition
11/1987
11/24/1987US4709390 Speech message code modifying arrangement
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