| Patents for H04S 5 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation (2,758) |
|---|
| 04/23/1997 | CN2253088Y Double-voice infrared emitter |
| 04/16/1997 | CN2252469Y Regulating loudspeaker box inverted amplifier |
| 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 |
| 02/11/1997 | US5602922 Method and apparatus for processing an audio signal by surround modes |
| 02/05/1997 | EP0757506A2 Compatible audio system for special playback applications with surround system |
| 01/21/1997 | US5596644 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
| 01/14/1997 | US5594800 Sound reproduction system having a matrix converter |
| 01/07/1997 | US5592558 Sound reproduction device |
| 01/03/1997 | WO1997000594A1 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 01/02/1997 | EP0750811A1 Process for coding a plurality of audio signals |
| 12/24/1996 | US5587936 Method and apparatus for creating sounds in a virtual world by simulating sound in specific locations in space and generating sounds as touch feedback |
| 12/24/1996 | CA2126903C Digital surround sound method and apparatus |
| 12/24/1996 | CA2047046C Monaural to sterephonic sound translation process and apparatus |
| 12/04/1996 | EP0746177A2 Apparatus for generating surround sound from stereo signals of an audio source |
| 11/26/1996 | US5579395 Stereo decoder with cross-talk compensation |
| 09/10/1996 | US5555306 Audio signal processor providing simulated source distance control |
| 09/04/1996 | EP0462285B1 Acoustic reproducing device |
| 08/13/1996 | US5546465 Audio playback apparatus and method |
| 06/18/1996 | US5528694 Audio signal processing arrangement for deriving a centre channel signal and also an audio visual reproduction system comprising such a processing arrangement |
| 06/04/1996 | US5524054 Method for generating a multi-channel audio decoder matrix |
| 06/04/1996 | US5524053 Sound field control device |
| 05/30/1996 | CA2136922A1 Dolby stereo sound reproducing system using speakers with pyramidal cabinets |
| 05/29/1996 | EP0714222A2 Pseudostereo processor for mobile receiver |
| 05/28/1996 | US5521330 Sound control device and method for uniformly shifting the phase of sound data |
| 05/17/1996 | WO1996014723A1 Loudspeaker system with controlled directional sensitivity |
| 05/15/1996 | DE4440451A1 Direction setting appts. i.e. PanPot or Panorama control e.g. for two-channel stereophony system |
| 05/09/1996 | WO1996013962A1 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
| 04/24/1996 | CN1121302A Signal combining circuit, signal processing circuit including the signal combining circuit, stereophonic audio reproduction system including the signal processing circuit, and an audio-visual......... |
| 04/09/1996 | US5506907 Channel audio signal encoding method |
| 04/03/1996 | EP0705054A2 Sound reproduction system |
| 04/02/1996 | US5504819 Surround sound processor with improved control voltage generator |
| 03/20/1996 | CN1031376C Electronic gaming device with pseudo-stereophonic sound generating capabilities |
| 03/12/1996 | US5499300 Stereo and dual audio signal identifying circuit |
| 03/05/1996 | US5497206 Circuit for controlling an audio signal output of a television |
| 01/23/1996 | US5487113 Method and apparatus for generating audiospatial effects |
| 01/16/1996 | US5485514 Telephone instrument and method for altering audible characteristics |
| 01/03/1996 | EP0689756A1 Plural-channel sound processing |
| 11/23/1995 | WO1995031881A1 Three-dimensional virtual audio display employing reduced complexity imaging filters |
| 11/14/1995 | US5467401 Sound environment simulator using a computer simulation and a method of analyzing a sound space |
| 10/18/1995 | EP0677235A1 Sound image manipulation apparatus and method for sound image enhancement |
| 10/17/1995 | US5459790 For providing sound effects to a listener |
| 09/28/1995 | WO1995026083A1 Process for coding a plurality of audio signals |
| 09/21/1995 | DE4409368A1 Verfahren zum Codieren mehrerer Audiosignale A method for encoding a plurality of audio signals |
| 09/19/1995 | US5452360 Sound field control device and method for controlling a sound field |
| 07/27/1995 | WO1995020306A1 Passive surround sound circuit |
| 07/26/1995 | EP0664661A1 Signal combining circuit for stereophonic audio reproduction system using cross feeding |
| 07/19/1995 | EP0312614B1 Data transfer system |
| 06/27/1995 | US5428687 Control voltage generator multiplier and one-shot for integrated surround sound processor |
| 06/20/1995 | US5426702 System for deriving a center channel signal from an adapted weighted combination of the left and right channels in a stereophonic audio signal |
| 05/23/1995 | US5418856 Stereo signal generator |
| 05/17/1995 | EP0653897A2 Method and apparatus for generating audiospatial effects |
| 05/13/1995 | CA2135721A1 Method and apparatus for generating audiospatial effects |
| 05/09/1995 | US5414774 Circuit and method for controlling an audio system |
| 05/02/1995 | US5412732 Stereo surround system |
| 04/20/1995 | WO1995010831A1 Improvements in reverberators for use in wide band assisted reverberation systems |
| 04/18/1995 | CA2053101C Sound field control device |
| 03/22/1995 | EP0643899A1 Stereophonic signal processor generating pseudo stereo signals |
| 03/08/1995 | EP0642292A2 Device for sonic stereo reproduction |
| 02/22/1995 | EP0639933A2 Method and apparatus for processing an audio signal by surround modes |
| 02/22/1995 | EP0639317A1 Loudspeaker system |
| 02/15/1995 | EP0639038A2 Circuit for converting a stereo signal |
| 01/31/1995 | US5386473 Passive surround sound circuit |
| 01/10/1995 | US5381482 Sound field controller |
| 12/21/1994 | EP0630108A2 A method of expanding the frequency range of a digital audio signal |
| 11/29/1994 | US5369224 Electronic musical instrument producing pitch-dependent stereo sound |
| 11/16/1994 | CN1026634C 回声添加电路 Echo adding circuit |
| 10/27/1994 | WO1994024836A1 Interactive sound placement system and process |
| 10/17/1994 | EP0639317A4 Loudspeaker system. |
| 10/13/1994 | WO1994023406A1 Non-contact audio delivery system for a three-dimensional sound presentation |
| 10/11/1994 | US5355416 Psycho acoustic pseudo-stereo fold back system |
| 09/29/1994 | WO1994022278A1 Plural-channel sound processing |
| 09/29/1994 | DE4310105A1 Stereophonic sound processor |
| 09/29/1994 | CA2158451A1 Plural-channel sound processing |
| 09/28/1994 | EP0617405A1 Sound field control device |
| 09/07/1994 | CN1091889A Stereophonic manipulation apparatus and method for sound image enhancement |
| 08/16/1994 | US5339363 Apparatus for enhancing monophonic audio signals using phase shifters |
| 08/03/1994 | EP0608937A1 Audio signal processing arrangement for deriving a centre channel signal and also an audio visual reproduction system comprising such a processing arrangement |
| 07/26/1994 | US5333201 Multi dimensional sound circuit |
| 07/21/1994 | WO1994016538A1 Sound image manipulation apparatus and method for sound image enhancement |
| 07/21/1994 | CA2153062A1 Sound image manipulation apparatus and method for sound image enhancement |
| 07/20/1994 | EP0606968A1 Multi-dimensional sound circuit |
| 06/14/1994 | CA1330200C Surround-sound system |
| 06/07/1994 | US5319713 Multi dimensional sound circuit |
| 05/31/1994 | CA1329911C Sound imaging method and apparatus |
| 04/26/1994 | US5307415 Surround processor with antiphase blending and panorama control circuitry |
| 04/20/1994 | EP0593228A1 Sound environment simulator and a method of analyzing a sound space |
| 04/05/1994 | US5301236 System for producing stereo-simulated signals for simulated-stereophonic sound |
| 03/22/1994 | US5297209 System for calibrating sound field |
| 03/22/1994 | US5297034 Telepathology diagnostic network |
| 03/15/1994 | US5295189 Control voltage generator for surround sound processor |
| 02/08/1994 | US5285503 Apparatus for reproducing sound field |
| 01/19/1994 | CN1080878A Electronic gaming device with pseude-stereophonic sound generating cap abilities |
| 01/18/1994 | US5280528 Band pass filter circuit for rear channel filtering in a surround processor |
| 12/21/1993 | US5272757 Multi-dimensional reproduction system |
| 12/09/1993 | WO1993025055A1 Stereophonic signal processor generating pseudo stereo signals |
| 12/08/1993 | CN1023052C Sound imaging system for video game |
| 11/16/1993 | US5263087 Time constant processing circuit for surround processor |
| 11/10/1993 | CN1078341A High fidelity stereo deaf-mute recovery apparatus |