Patents for H04S 3 - Systems employing more than two channels, e.g. quadraphonic (4,597) |
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01/24/2001 | CN1281329A Directional decoding |
01/24/2001 | CN1281328A Video frequency signal processor |
01/17/2001 | EP1068769A1 In-home theater surround sound speaker system |
01/11/2001 | WO2001003471A1 Vehicle-mounted acoustic system |
01/03/2001 | EP1064824A1 Post-amplification stereophonic to surround sound decoding circuit |
01/03/2001 | CN1278996A 5-2-5 Matrix encoder and decoder system |
01/02/2001 | US6169812 Point source speaker system |
12/26/2000 | US6167140 AV Amplifier |
12/26/2000 | CA2122577C Process for simultaneous transmission of signals from n signal sources |
12/21/2000 | CA2374879A1 Voice-to-remaining audio (vra) interactive hearing aid & auxiliary equipment |
12/20/2000 | EP1061775A2 Audio signal processing |
12/20/2000 | CN1277532A Multiple-channel audio frequency replaying apparatus and method |
12/20/2000 | CN1277530A Stereo signal processing device |
12/14/2000 | WO2000076272A1 Digital wireless loudspeaker system |
12/13/2000 | CN1276959A Post-amplification stereophonic to surround sound decoding circuit |
12/06/2000 | EP1057366A1 Microphone apparatus for producing signals for surround reproduction |
11/30/2000 | WO2000072589A1 Home entertainment system audio handling. |
11/30/2000 | WO2000047018A3 Compatible matrix encoded surround-sound channels in a discrete digital sound format |
11/29/2000 | EP1056310A2 Automotive audio system |
11/29/2000 | CN1275301A Audio signal processor and audio device |
11/28/2000 | US6154553 Sound bubble structures for sound reproducing arrays |
11/28/2000 | US6154549 Method and apparatus for providing sound in a spatial environment |
11/28/2000 | US6154161 Integrated audio mixer |
11/22/2000 | EP1054575A2 Directional decoding |
11/07/2000 | US6144747 Head mounted surround sound system |
10/17/2000 | CA2260222C Coding and decoding of audio signals by using intensity stereo and prediction |
10/12/2000 | WO2000060746A2 Matrixing for losseless encoding and decoding of multichannels audio signals |
10/12/2000 | CA2742649A1 Matrix improvements to lossless encoding and decoding |
10/10/2000 | US6129283 Information reproduction apparatus for optically reading a code pattern from a recording medium and outputting desired information pieces of the read code pattern |
10/05/2000 | WO2000059265A1 Matrix surround decoder/virtualizer |
10/05/2000 | DE19914805A1 Soundsystem für ein Kraftfahrzeug und Verfahren zur Initialisierung eines solchen Sound system for a motor vehicle and method for initialization of such a |
10/04/2000 | EP1040965A1 Vehicle sound system and initialisation method |
10/04/2000 | EP1040466A2 Surround signal processing apparatus and method |
09/30/2000 | CA2267579A1 Matrix surround decoder/virtualizer |
09/27/2000 | CN1268015A Sound signal processing |
09/21/2000 | WO2000056093A1 Wcdma mobile device of transmissible multi-channel sounds |
09/21/2000 | WO2000022876A9 Point source speaker system |
09/20/2000 | EP1037505A2 Audio equipment and method of displaying operation thereof |
09/20/2000 | EP1037504A2 Audio equipment and method of displaying operation thereof |
09/20/2000 | EP1037503A2 Audio equipment and method of displaying operation thereof |
09/19/2000 | US6122382 System for processing audio surround signal |
09/19/2000 | US6122381 Stereophonic sound system |
09/12/2000 | US6118876 Surround sound speaker system for improved spatial effects |
09/12/2000 | US6118821 Compressed code decoding device and audio decoding device |
08/29/2000 | US6111959 Sound spreader |
08/23/2000 | CN1264533A Method and apparatus for encoding and decoding multiple audio channels at low bit rates |
08/22/2000 | US6108430 Headphone apparatus |
08/22/2000 | US6107886 High-efficiency power amplifier |
08/10/2000 | WO2000047018A2 Compatible matrix encoded surround-sound channels in a discrete digital sound format |
08/09/2000 | EP1025743A1 Utilisation of filtering effects in stereo headphone devices to enhance spatialization of source around a listener |
07/20/2000 | WO2000042819A1 A stereophonic spatial expansion circuit with tonal compensation and active matrixing |
07/20/2000 | WO2000042818A1 A stereophonic spatial expansion circuit with tonal compensation and active matrixing |
07/20/2000 | WO2000021337A3 Integrated audio mixer with alternating quantization output |
07/20/2000 | DE19900961A1 Verfahren und Vorrichtung zur Wiedergabe von Mehrkanaltonsignalen A method and apparatus for reproducing multi-channel audio |
07/19/2000 | EP1021063A2 Audio signal processing |
07/19/2000 | EP1021062A2 Method and apparatus for the reproduction of multi-channel audio signals |
07/12/2000 | CN1259800A Sound coding device and decoding device, optical recording medium and sound transmission method |
07/05/2000 | EP1016320A2 Method and apparatus for encoding and decoding multiple audio channels at low bit rates |
06/28/2000 | EP1014756A2 Method and apparatus for loudspeaker with positional 3D sound |
06/28/2000 | EP1013140A1 5-2-5 matrix encoder and decoder system |
06/28/2000 | EP1013018A1 Multichannel spectral mapping audio apparatus and method |
06/28/2000 | EP0873667A4 Sound system |
06/21/2000 | CN1257639A Audiochannel mixing |
06/14/2000 | CN1256851A Surround sound reproduction system, sound/visual reproduction system, surround signal processing unit and method for processing input surround signal |
06/13/2000 | US6076062 Method and device for transferring and decoding a non-PCM bitstream between a digital video disc and a multi-channel reproduction apparatus |
06/13/2000 | US6075868 Apparatus for the creation of a desirable acoustical virtual reality |
06/07/2000 | EP0632944B1 Process for transmitting or storing digitalized, multi-channel audio signals |
06/06/2000 | US6072879 Sound field control unit and sound field control device |
06/06/2000 | US6072878 Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics |
05/31/2000 | CN1255036A Multitone ring and driver transducer |
05/31/2000 | CN1053079C Equipment and method for producing multi-channel sound with two loudspeakers |
05/30/2000 | US6069962 Point source speaker system |
05/24/2000 | EP0788723B1 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
05/24/2000 | CN2379987Y Round sound treatment device for small sized bass voice box y |
05/24/2000 | CN1254161A Mutli-channel voice frequency reproduction equipment |
05/23/2000 | US6067360 Apparatus for localizing a sound image and a method for localizing the same |
05/23/2000 | US6067072 Audio equipment and method of displaying operating thereof |
05/17/2000 | EP1001654A2 Sound signal mixing |
05/17/2000 | EP1001549A2 Audio signal processing apparatus |
05/17/2000 | EP1001421A2 Multi-channel audio reproducing device |
05/17/2000 | CN1253464A 3D sound regeneration equipment and method for many listeners |
05/10/2000 | CN1252653A Wide band movable CDMA equipment capable of transmitting multichannel sound |
04/27/2000 | WO2000024226A1 Surround-sound system |
04/20/2000 | WO2000022876A1 Point source speaker system |
04/20/2000 | DE19847689A1 Arrangement for 3-dimensional sound reproduction has inverse filter module for filtering sound input signal, time multiplex module that selects order filtering, and several loudspeakers |
04/18/2000 | US6052470 System for processing audio surround signal |
04/13/2000 | WO2000021337A2 Integrated audio mixer with alternating quantization output |
04/13/2000 | WO1999048327A9 In-home theater surround sound speaker system |
04/13/2000 | CA2344890A1 Integrated audio mixer with alternating quantization output |
04/12/2000 | CN1250346A Audible signal processing circuit |
04/12/2000 | CN1250293A Decoding device and method for compressed multiple-track audio bit element flow |
04/06/2000 | WO2000019415A2 Method and apparatus for three-dimensional audio display |
04/06/2000 | WO2000019413A1 Multi-channel signal encoding and decoding |
04/05/2000 | EP0990370A1 Reproduction of spatialised audio |
04/05/2000 | EP0990369A2 Sound reproduction system |
03/30/2000 | WO2000018031A1 Method and device for developing a virtual speaker distant from the sound source |
03/30/2000 | CA2345336A1 Method and device for developing a virtual speaker distant from the sound source |
03/08/2000 | EP0984667A2 Method and apparatus for efficient presentation of high-quality three-dimensional audio |
02/09/2000 | CN1244084A Device and method for simulating multi-channel signals |
02/08/2000 | US6023490 Encoding apparatus for encoding a plurality of information signals |