| Patents for H04S 1 - Two-channel systems (4,182) |
|---|
| 06/24/1997 | US5642422 Digital surround sound method and apparatus |
| 06/18/1997 | EP0779764A2 Apparatus for enhancing stereo effect with central sound image maintenance circuit |
| 06/18/1997 | EP0611516B1 Process for reducing data in the transmission and/or storage of digital signals from several dependent channels |
| 06/17/1997 | CA2073615C System for calibrating sound field |
| 06/12/1997 | CA2192511A1 Apparatus for enhancing stereo effect with central sound image maintenance circuit |
| 06/10/1997 | US5638343 Method and apparatus for re-recording multi-track sound recordings for dual-channel playbacK |
| 06/04/1997 | EP0777326A2 Method and apparatus for filtering an audio signal |
| 06/04/1997 | EP0776593A1 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 06/04/1997 | EP0776592A1 Sound recording and reproduction systems |
| 06/04/1997 | CN2255705Y Multi-function language OK machine |
| 06/03/1997 | US5636324 Apparatus and method for stereo audio encoding of digital audio signal data |
| 05/28/1997 | EP0776144A1 Signal modification circuit |
| 05/27/1997 | US5633935 Stereo ultradirectional microphone apparatus |
| 05/20/1997 | US5631964 Audio apparatus |
| 05/20/1997 | US5631963 Circuit arrangement for the recognition of adjacent channel interference |
| 05/20/1997 | US5631848 Data processing system |
| 05/14/1997 | EP0773702A2 Stereo enhancement and directivity servo |
| 05/07/1997 | EP0719483B1 Process for determining the type of coding to be selected for coding at least two signals |
| 05/07/1997 | EP0418252B1 Stereo synthesizer and corresponding method |
| 05/07/1997 | CN1034846C Stereophonic sound system and stereophonic circuit |
| 05/06/1997 | US5627535 Quantization apparatus |
| 04/29/1997 | US5625745 Noise imaging protection for multi-channel audio signals |
| 04/09/1997 | EP0645070B1 Stereophonic sound reproduction device using several loudspeakers in each channel |
| 04/09/1997 | CN1034546C Stereo reproducing system by series connection in same direction |
| 04/08/1997 | US5619582 Enhanced concert audio process utilizing a synchronized headgear system |
| 03/27/1997 | WO1997011533A1 A directional acoustic signal processor and method therefor |
| 03/25/1997 | CA2107320C Audio signal processing apparatus with optimization process |
| 03/20/1997 | DE19534471A1 Assessing loudspeaker timbre for stereo systems |
| 03/18/1997 | US5613035 Apparatus for adaptively encoding input digital audio signals from a plurality of channels |
| 03/18/1997 | US5613010 Apparatus for reproducing sound with a reduced dynamic range |
| 03/18/1997 | CA2117545C Voice canceler with simulated stereo output |
| 03/12/1997 | EP0762804A2 Three-dimensional acoustic processor which uses linear predictive coefficients |
| 03/12/1997 | EP0762803A2 Headphone device |
| 03/12/1997 | EP0762801A2 Non-directional speaker system with point sound source |
| 03/11/1997 | US5610985 Digital 3-channel transmission of left and right stereo signals and a center signal |
| 03/11/1997 | US5610555 Low-voltage driven, audio signal amplifying apparatus and a portable acoustic system using said apparatus |
| 03/05/1997 | EP0760197A1 Three-dimensional virtual audio display employing reduced complexity imaging filters |
| 02/18/1997 | US5604810 Sound field control system for a multi-speaker system |
| 02/18/1997 | US5604809 Sound field control system |
| 02/13/1997 | WO1997005755A1 Acoustic correction apparatus |
| 02/06/1997 | WO1997004621A1 Process for reducing redundancy during the coding of multichannel signals and device for decoding redundancy-reduced multichannel signals |
| 02/06/1997 | WO1997004620A1 Headphone device |
| 02/05/1997 | EP0757506A2 Compatible audio system for special playback applications with surround system |
| 02/04/1997 | CA2047037C Surround sound effect control device |
| 01/29/1997 | EP0756437A2 Acoustic correction apparatus |
| 01/28/1997 | US5598478 Sound image localization control apparatus |
| 01/23/1997 | DE19526366A1 Verfahren zur Redundanzreduktion bei der Codierung von mehrkanaligen Signalen und Vorrichtung zur Dekodierung von redundanzreduzierten, mehrkanaligen Signalen A method for reducing redundancy during the coding of multichannel signals and apparatus for decoding redundancy-reduced multichannel signals |
| 01/21/1997 | US5596645 Sound image localization control device for controlling sound image localization of plural sounds independently of each other |
| 01/21/1997 | US5596644 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
| 01/21/1997 | US5596603 Device for wireless transmission of digital data, in particular of audio data, by infrared light in headphones |
| 01/15/1997 | CN1140294A Vocal mix circuit |
| 01/14/1997 | US5594801 Ambient expansion loudspeaker system |
| 01/14/1997 | US5594494 Moving picture coding apparatus |
| 01/07/1997 | US5592588 Method and apparatus for object-oriented digital audio signal processing using a chain of sound objects |
| 01/07/1997 | US5592558 Sound reproduction device |
| 01/03/1997 | WO1997000594A1 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 01/01/1997 | CN2244277Y Stereophonic infrared transmission device |
| 12/31/1996 | US5590207 Sound reproducing array processor system |
| 12/31/1996 | US5590204 Device for reproducing 2-channel sound field and method therefor |
| 12/24/1996 | CA2126903C Digital surround sound method and apparatus |
| 12/17/1996 | US5585587 Acoustic image localization apparatus for distributing tone color groups throughout sound field |
| 12/11/1996 | EP0748143A2 Stereo enhancement system |
| 12/11/1996 | EP0746960A1 Binaural synthesis, head-related transfer functions, and uses thereof |
| 12/05/1996 | DE19518862C1 Anti=distortion device for multi=channel signals |
| 11/26/1996 | US5579396 Surround signal processing apparatus |
| 11/26/1996 | US5579395 Stereo decoder with cross-talk compensation |
| 11/21/1996 | DE19620010A1 Loudspeaker system with satellite housing |
| 11/20/1996 | EP0743640A2 Audio processing unit for mixing L channel and R channel of CD/CD-I audio signal |
| 11/14/1996 | WO1996029779A3 A method for implementing a sound reproduction system for a large space, and a sound reproduction system |
| 11/06/1996 | CN1135120A Bass enhancement circuit |
| 11/05/1996 | US5572591 For reproducing a sound field with presence |
| 10/31/1996 | WO1996034509A1 Stereo enhancement system |
| 10/30/1996 | EP0740487A2 Stereophonic sound field expansion device |
| 10/26/1996 | CA2147812A1 Sound card with fm transmitter |
| 10/24/1996 | WO1996033591A1 An acoustical audio system for producing three dimensional sound image |
| 10/24/1996 | CA2218608A1 An acoustical audio system for producing three dimensional sound image |
| 10/16/1996 | EP0737410A1 Apparatus for audio signal stereophonic adjustment |
| 10/15/1996 | US5566241 Method and apparatus for presentation of on-line directional sound |
| 10/02/1996 | EP0735796A2 Method and apparatus for reproducing three-dimensional virtual space sound |
| 10/01/1996 | US5561716 Demodulator |
| 10/01/1996 | CA2171370A1 Method and apparatus for reproducing three-dimensional virtual space sound |
| 09/26/1996 | WO1996029779A2 A method for implementing a sound reproduction system for a large space, and a sound reproduction system |
| 09/17/1996 | US5557680 Loudspeaker system for producing multiple sound images within a listening area from dual source locations |
| 09/17/1996 | US5557590 Auto changer capable of recording/reproducing information signals on a selective disc-shaped recording medium |
| 09/11/1996 | EP0730812A1 Apparatus for processing binaural signals |
| 09/11/1996 | EP0642719B1 Process for reducing data in the transmission and/or storage of digital signals from several interdependent channels |
| 09/10/1996 | US5555515 Apparatus and method for generating linearly filtered composite signal |
| 09/10/1996 | US5555310 Stereo voice transmission apparatus, stereo signal coding/decoding apparatus, echo canceler, and voice input/output apparatus to which this echo canceler is applied |
| 09/10/1996 | US5555306 Audio signal processor providing simulated source distance control |
| 09/03/1996 | US5553150 Reverberation - imparting device capable of modulating an input signal by random numbers |
| 09/03/1996 | US5553147 Stereophonic reproduction method and apparatus |
| 08/28/1996 | EP0729287A2 Low frequency audio conversion circuit |
| 08/27/1996 | US5550924 Reduction of background noise for speech enhancement |
| 08/27/1996 | US5550920 Voice canceler with simulated stereo output |
| 08/07/1996 | EP0725492A2 Perceptual stereo audio encoder |
| 08/06/1996 | US5544249 Method of simulating a room and/or sound impression |
| 07/16/1996 | US5537613 Device and method for detecting pilot signal for two-carrier sound multiplexing system |
| 07/11/1996 | WO1996021290A1 Audio signal identification using digital labelling signals |
| 07/11/1996 | CA2209621A1 Audio signal identification using digital labelling signals |
| 07/09/1996 | US5535300 Perceptual coding of audio signals using entropy coding and/or multiple power spectra |