| 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) |
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| 09/11/1998 | CA2282693A1 A high resolution post processing method for a speech decoder |
| 09/08/1998 | US5806025 Method and system for adaptive filtering of speech signals using signal-to-noise ratio to choose subband filter bank |
| 09/08/1998 | US5806023 Communication receiver |
| 09/08/1998 | US5806022 Method and system for performing speech recognition |
| 09/03/1998 | WO1998038631A1 Apparatus and method for rate determination in a communication system |
| 09/02/1998 | EP0861461A2 Systems and methods for secure transaction management and electronic rights protection |
| 09/02/1998 | EP0759201A4 Audio analysis/synthesis system |
| 08/27/1998 | WO1998037542A1 Accelerated convolution noise elimination |
| 08/27/1998 | CA2278231A1 Accelerated convolution noise elimination |
| 08/26/1998 | EP0860944A1 Separation system for non-stationary sources |
| 08/26/1998 | EP0860811A2 Automated speech alignment for image synthesis |
| 08/26/1998 | EP0860003A1 Inverse transform narrow band/broad band sound synthesis |
| 08/24/1998 | CA2228901A1 Automated speech alignment for image synthesis |
| 08/13/1998 | WO1998035340A2 Voice conversion system and methodology |
| 08/13/1998 | WO1998035339A2 A system and methodology for prosody modification |
| 08/11/1998 | US5794203 Biofeedback system for speech disorders |
| 08/11/1998 | US5794201 Digital acoustic signal processing apparatus |
| 08/11/1998 | US5794192 Self-learning speaker adaptation based on spectral bias source decomposition, using very short calibration speech |
| 08/05/1998 | EP0856834A2 Noise canceler |
| 08/05/1998 | EP0856833A2 Noise canceling method and apparatus for the same |
| 08/04/1998 | US5790759 Perceptual noise masking measure based on synthesis filter frequency response |
| 07/29/1998 | EP0855806A2 Echo suppressor for the speach input of a dialogue system |
| 07/29/1998 | EP0855699A2 Multipulse-excited speech coder/decoder |
| 07/22/1998 | EP0854418A2 Speech recognition interface |
| 07/22/1998 | CA2227478A1 Echo suppressor for a speech input dialogue system |
| 07/14/1998 | US5781888 Perceptual noise shaping in the time domain via LPC prediction in the frequency domain |
| 07/14/1998 | US5781885 Compression/expansion method of time-scale of sound signal |
| 07/14/1998 | US5781883 Method for real-time reduction of voice telecommunications noise not measurable at its source |
| 07/14/1998 | US5781880 Pitch lag estimation using frequency-domain lowpass filtering of the linear predictive coding (LPC) residual |
| 07/14/1998 | US5781696 Speed-variable audio play-back apparatus |
| 07/08/1998 | EP0852052A1 System for adaptively filtering audio signals to enhance speech intelligibility in noisy environmental conditions |
| 07/08/1998 | EP0852051A1 Process for automatic control of one or more devices by voice commands or by real-time voice dialog and apparatus for carrying out this process |
| 07/08/1998 | EP0792568A4 Noise cancellation apparatus |
| 07/07/1998 | US5778340 Adapting input speech and reference patterns for changing speaker and environment |
| 07/07/1998 | US5778338 Apparatus for masking frame errors |
| 07/07/1998 | CA2137840C Speech recognition using bio-signals |
| 07/01/1998 | EP0851404A2 System and method for enhanced intelligibility of voice messages |
| 07/01/1998 | CN1186303A Method of reproducing audio signals and audio player |
| 06/30/1998 | US5774850 Sound characteristic analyzer with a voice characteristic classifying table, for analyzing the voices of unspecified persons |
| 06/30/1998 | US5774846 Speech coding apparatus, linear prediction coefficient analyzing apparatus and noise reducing apparatus |
| 06/30/1998 | US5774835 Method and apparatus of postfiltering using a first spectrum parameter of an encoded sound signal and a second spectrum parameter of a lesser degree than the first spectrum parameter |
| 06/24/1998 | CN1185616A Audio-frequency bandwidth-expanding system and method thereof |
| 06/23/1998 | US5771486 Method for reducing noise in speech signal and method for detecting noise domain |
| 06/23/1998 | US5770813 Sound reproducing apparatus provides harmony relative to a signal input by a microphone |
| 06/18/1998 | WO1998026525A1 Portable radio telephone equipment and control thereof |
| 06/18/1998 | DE19753453A1 Film synchronisation system with text or speech converter |
| 06/17/1998 | EP0847559A1 Methods and systems for designing and making signal-processor circuits with internal companding, and the resulting circuits |
| 06/17/1998 | EP0748494B1 Siren detector |
| 06/16/1998 | US5768473 Adaptive speech filter |
| 06/16/1998 | US5768392 Blind adaptive filtering of unknown signals in unknown noise in quasi-closed loop system |
| 06/10/1998 | EP0847014A1 Method for processing a digital signal |
| 06/10/1998 | CN1184382A Method for processing digital signal |
| 06/09/1998 | US5765134 Method to electronically alter a speaker's emotional state and improve the performance of public speaking |
| 06/09/1998 | US5765124 Time-varying feature space preprocessing procedure for telephone based speech recognition |
| 06/04/1998 | WO1998024225A1 Interactive apparatus |
| 06/03/1998 | CN1183841A System and method for secure transaction management and electronic rights protection |
| 06/02/1998 | US5761638 Telephone network apparatus and method using echo delay and attenuation |
| 05/28/1998 | WO1998022935A2 Formant extraction using peak-picking and smoothing techniques |
| 05/27/1998 | CN1183018A Transmitter capable of reducing background noise |
| 05/26/1998 | US5757938 High efficiency encoding device and a noise spectrum modifying device and method |
| 05/26/1998 | US5757937 Acoustic noise suppressor |
| 05/22/1998 | WO1998021710A1 Sound reproducing speed converter |
| 05/19/1998 | US5754973 Methods and apparatus for replacing missing signal information with synthesized information and recording medium therefor |
| 05/19/1998 | US5754681 Signal pattern recognition apparatus comprising parameter training controller for training feature conversion parameters and discriminant functions |
| 05/19/1998 | US5754666 Method for reproducing audio signals and an apparatus therefore |
| 05/14/1998 | WO1998020483A1 Sound source vector generator, voice encoder, and voice decoder |
| 05/14/1998 | WO1998020482A1 Time-domain time/pitch scaling of speech or audio signals, with transient handling |
| 05/14/1998 | WO1998020481A1 System for fourier transform-based modification of audio |
| 05/13/1998 | CN1181830A Reproducing speed changer |
| 05/12/1998 | US5752228 Speech synthesis apparatus and read out time calculating apparatus to finish reading out text |
| 05/12/1998 | US5752226 Method and apparatus for reducing noise in speech signal |
| 05/12/1998 | US5750912 Formant converting apparatus modifying singing voice to emulate model voice |
| 05/06/1998 | EP0840466A2 Echo canceller control in a satellite communication system |
| 05/06/1998 | CN1181149A 波形语音合成 Waveform speech synthesis |
| 05/05/1998 | US5749068 Speech recognition apparatus and method in noisy circumstances |
| 05/05/1998 | US5749064 Method and system for time scale modification utilizing feature vectors about zero crossing points |
| 05/05/1998 | US5748725 Telephone set with background noise suppression function |
| 04/29/1998 | EP0838805A2 Speech recognition apparatus using pitch intensity information |
| 04/29/1998 | EP0838804A2 Audio bandwidth extending system and method |
| 04/29/1998 | EP0838803A2 Distance calculation for use in a speech recognition apparatus |
| 04/21/1998 | US5742928 Apparatus and method for speech recognition in the presence of unnatural speech effects |
| 04/21/1998 | US5742927 Noise reduction apparatus using spectral subtraction or scaling and signal attenuation between formant regions |
| 04/21/1998 | US5742734 Encoding rate selection in a variable rate vocoder |
| 04/21/1998 | US5741136 Audio-visual work with a series of visual word symbols coordinated with oral word utterances |
| 04/16/1998 | WO1998015946A1 Systems and methods for communicating desired audio information over a communications medium |
| 04/16/1998 | CA2267595A1 Systems and methods for communicating desired audio information over a communications medium |
| 04/15/1998 | CN1038089C Appratus for coding or decoding signals and method for coding or decoding |
| 04/07/1998 | US5737719 Method and apparatus for enhancement of telephonic speech signals |
| 03/31/1998 | US5734794 Computer based method for animating images |
| 03/25/1998 | EP0831459A2 Method of changing a pitch of a VCV phoneme-chain waveform and apparatus of synthesizing a sound from a series of VCV phoneme-chain waveforms |
| 03/25/1998 | EP0831458A2 Method and apparatus for separation of sound source, program recorded medium therefor, method and apparatus for detection of sound source zone; and program recorded medium therefor |
| 03/24/1998 | US5732390 Speech signal transmitting and receiving apparatus with noise sensitive volume control |
| 03/24/1998 | US5732143 Noise cancellation apparatus |
| 03/18/1998 | EP0829851A2 Voice speed converter |
| 03/18/1998 | CN1176702A A communication system and method using a speaker dependent time scaling technique |
| 03/17/1998 | US5729658 Evaluating intelligibility of speech reproduction and transmission across multiple listening conditions |
| 03/17/1998 | US5729657 Time compression/expansion of phonemes based on the information carrying elements of the phonemes |
| 03/11/1998 | CN1176034A Apparatus and method for canceling acoustic echoes including non-linear distortions in loudspeaker telephones |
| 03/10/1998 | US5727124 Method of and apparatus for signal recognition that compensates for mismatching |
| 03/10/1998 | US5727073 Noise cancelling method and noise canceller with variable step size based on SNR |