| 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) |
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| 03/11/1999 | DE19739425A1 Verfahren und Anordnung zur Wiedergabe eines sterophonen Audiosignals Method and apparatus for reproducing an audio signal sterophonen |
| 03/10/1999 | CN1210438A Sound shifting method for broadcasting system |
| 03/03/1999 | CN1209718A Acoustic-field correction circuit |
| 02/24/1999 | EP0897651A1 Audio enhancement system for use in a surround sound environment |
| 02/17/1999 | EP0791279B1 Loudspeaker system with controlled directional sensitivity |
| 02/17/1999 | CN1208541A A mono-stereo conversion device, an audio reproduction system using such a device and a mono-stereo conversion method |
| 02/09/1999 | US5870480 Multichannel active matrix encoder and decoder with maximum lateral separation |
| 12/29/1998 | US5854847 Speaker system for use in an automobile vehicle |
| 12/16/1998 | EP0883973A1 A mono-stereo conversion device, an audio reproduction system using such a device and a mono-stereo conversion method |
| 12/15/1998 | US5850454 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 12/03/1998 | WO1998042162A3 Multidirectional audio decoding |
| 12/02/1998 | EP0881857A2 Sound field correction circuit |
| 11/25/1998 | EP0880301A2 Full sound enhancement using multi-input sound signals |
| 11/24/1998 | US5841879 Virtually positioned head mounted surround sound system |
| 11/19/1998 | CA2236342A1 Full sound enhancement using multi-input sound signals |
| 11/18/1998 | EP0878798A2 Audio signal encoding/decoding method and apparatus |
| 11/04/1998 | EP0875126A1 Surround sound processor with improved control voltage generator |
| 10/14/1998 | CN1195958A Output signal loop circuit capable of obtaining input signal and display frequency |
| 10/01/1998 | WO1998043466A1 Audiochannel mixing |
| 09/24/1998 | WO1998042162A2 Multidirectional audio decoding |
| 09/22/1998 | US5812674 Method to simulate the acoustical quality of a room and associated audio-digital processor |
| 09/22/1998 | US5812672 Method for reducing data in the transmission and/or storage of digital signals of several dependent channels |
| 09/16/1998 | EP0865226A2 A system for improving a spatial effect of stereo sound or encoded sound |
| 09/15/1998 | US5809153 Loudspeaker system |
| 09/01/1998 | US5802180 Method and apparatus for efficient presentation of high-quality three-dimensional audio including ambient effects |
| 08/18/1998 | US5796844 Multichannel active matrix sound reproduction with maximum lateral separation |
| 08/12/1998 | EP0858243A2 Surround sound channel encoding and decoding |
| 07/29/1998 | CN1189081A Multi-channel audio enhancement system for use in recording and playback and method for providing same |
| 07/22/1998 | EP0854660A2 Sound processing circuit |
| 07/21/1998 | CA2007435C Electronic gaming device with pseudo-stereophonic sound generating capabilities |
| 06/23/1998 | US5771295 5-2-5 matrix system |
| 06/10/1998 | EP0847225A2 Electroacoustical transducing |
| 06/03/1998 | EP0845173A1 Circuit arrangement for influencing the frequency response of a digital audio signal |
| 06/02/1998 | US5761295 Telephone instrument and method for altering audible characteristics |
| 05/28/1998 | WO1998023131A1 A mono-stereo conversion device, an audio reproduction system using such a device and a mono-stereo conversion method |
| 05/28/1998 | DE19720217A1 Automatic equalising arrangement for multi-channel audio system |
| 05/26/1998 | US5757928 Audio amplifier arrangement for more than two reproduction channels |
| 05/20/1998 | EP0843503A2 Circuit for obtaining a surround sound effect |
| 05/20/1998 | EP0843409A1 Power amplifier apparatus |
| 05/14/1998 | WO1998020709A1 Multi-channel audio enhancement system for use in recording and playback and methods for providing same |
| 05/14/1998 | WO1998020708A1 Multichannel active matrix encoder and decoder with maximum lateral separation |
| 05/14/1998 | WO1998020706A1 Method and device for projecting sound sources onto loudspeakers |
| 05/14/1998 | DE19646055A1 Verfahren und Vorrichtung zur Abbildung von Schallquellen auf Lautsprecher Method and apparatus for mapping the sound sources onto loudspeakers |
| 05/06/1998 | EP0840281A1 Silent stringed instrument for producing electric sound from virtual sound source same as that of acoustic stringed instrument |
| 05/05/1998 | US5748835 Audio signal decoding apparatus and method for a disc driving system |
| 04/21/1998 | US5742687 Signal processing circuit including a signal combining circuit stereophonic audio reproduction system including the signal processing circuit and an audio-visual reproduction system including the stereophonic audio reproduction system |
| 04/15/1998 | EP0836365A2 System for processing audio surround signal |
| 04/15/1998 | CN1179074A Apparatus for reproducing multi channel voice using two speaker and its method |
| 04/01/1998 | EP0833302A2 Sound field reproducing device |
| 03/26/1998 | WO1998012896A1 Transaural stereo device |
| 03/26/1998 | WO1998012827A1 Multichannel spectral mapping audio apparatus and method |
| 03/25/1998 | EP0750811B1 Process for coding a plurality of audio signals |
| 03/24/1998 | US5732142 Musical sound reproduction controller with two-stage adjustment of tone |
| 03/17/1998 | US5729613 Reverberators for use in wide band assisted reverberation systems |
| 03/10/1998 | US5727067 Sound field control device |
| 03/04/1998 | CN1175182A Method and device for producing multi-way sound channel from single sound channel |
| 02/25/1998 | EP0825800A2 Method and apparatus for generating multi-audio signals from a mono audio signal |
| 02/19/1998 | WO1998007299A1 Recording and play-back two-channel system for providing a holophonic reproduction of sounds |
| 02/04/1998 | CN1172320A Method and apparatus for simulating sound in virtual space to have listenen enjoy artificial experience of sound |
| 02/03/1998 | US5715317 Apparatus for controlling localization of a sound image |
| 01/29/1998 | WO1998004100A1 Multichannel active matrix sound reproduction with maximum lateral separation |
| 01/21/1998 | EP0820213A2 Sound reproduction |
| 01/15/1998 | WO1998001197A1 Sound effect mechanism |
| 01/06/1998 | CA2071708C Audio surround system with stereo enhancement and directivity servos |
| 01/02/1998 | DE19624362A1 Schaltungsanordnung zur Frequenzgangbeeinflussung eines digitalen Audiosignals A circuit arrangement for influencing the frequency response of a digital audio signal |
| 12/24/1997 | WO1997049179A1 Circuit arrangement for influencing the frequency response of a digital audio signal |
| 12/23/1997 | US5701346 Method of coding a plurality of audio signals |
| 12/17/1997 | CN2271083Y Voice box |
| 12/09/1997 | US5696834 Stereo system and stereo method for electronic acoustical system |
| 11/25/1997 | US5692050 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 11/19/1997 | EP0808076A1 Surround system |
| 11/06/1997 | WO1997041711A1 Audio enhancement system for use in a surround sound environment |
| 11/06/1997 | CA2252595A1 Audio enhancement system for use in a surround sound environment |
| 10/30/1997 | WO1997040642A1 Six-axis surround sound processor with automatic balancing and calibration |
| 10/21/1997 | US5680464 Sound field controlling device |
| 10/09/1997 | WO1997037512A1 Six-axis surround sound processor with improved matrix and cancellation control |
| 09/23/1997 | US5671287 Stereophonic signal processor |
| 09/10/1997 | CN1159047A Audio signal decoding apparatus and method for disc driving system |
| 09/09/1997 | US5666425 Plural-channel sound processing |
| 09/09/1997 | US5666424 Six-axis surround sound processor with automatic balancing and calibration |
| 08/27/1997 | EP0791279A1 Loudspeaker system with controlled directional sensitivity |
| 08/27/1997 | CN2261130Y Inductive audio-frequency frequency devider |
| 08/26/1997 | US5661812 Head mounted surround sound system |
| 08/20/1997 | EP0790753A1 System for sound spatial effect and method therefor |
| 08/19/1997 | US5659619 Three-dimensional virtual audio display employing reduced complexity imaging filters |
| 08/13/1997 | EP0788723A1 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
| 07/03/1997 | WO1997024012A1 Surround sound processor with improved control voltage generator |
| 07/02/1997 | EP0782372A2 5-2-5 Matrix system |
| 07/02/1997 | CN1153367A Audio system which not only enables application of surround system standard to special playback uses but also easily maintains compatibility with surround system |
| 07/01/1997 | US5644640 Surround sound processor with improved control voltage generator |
| 06/24/1997 | US5642425 Sound field control device |
| 06/24/1997 | US5642422 Digital surround sound method and apparatus |
| 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 |
| 06/04/1997 | EP0777326A2 Method and apparatus for filtering an audio signal |
| 06/04/1997 | EP0776593A1 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 05/13/1997 | US5630175 Surround sound system for general purpose computer using dual sound cards |
| 05/07/1997 | EP0418252B1 Stereo synthesizer and corresponding method |
| 04/29/1997 | US5625696 Six-axis surround sound processor with improved matrix and cancellation control |
| 04/23/1997 | EP0769874A1 Audio amplifier arrangement for more than two reproduction channels |