Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 3 - Systems employing more than two channels, e.g. quadraphonic
Patents for H04S 3 - Systems employing more than two channels, e.g. quadraphonic (4,597)
01/2001
01/24/2001CN1281329A Directional decoding
01/24/2001CN1281328A Video frequency signal processor
01/17/2001EP1068769A1 In-home theater surround sound speaker system
01/11/2001WO2001003471A1 Vehicle-mounted acoustic system
01/03/2001EP1064824A1 Post-amplification stereophonic to surround sound decoding circuit
01/03/2001CN1278996A 5-2-5 Matrix encoder and decoder system
01/02/2001US6169812 Point source speaker system
12/2000
12/26/2000US6167140 AV Amplifier
12/26/2000CA2122577C Process for simultaneous transmission of signals from n signal sources
12/21/2000CA2374879A1 Voice-to-remaining audio (vra) interactive hearing aid & auxiliary equipment
12/20/2000EP1061775A2 Audio signal processing
12/20/2000CN1277532A Multiple-channel audio frequency replaying apparatus and method
12/20/2000CN1277530A Stereo signal processing device
12/14/2000WO2000076272A1 Digital wireless loudspeaker system
12/13/2000CN1276959A Post-amplification stereophonic to surround sound decoding circuit
12/06/2000EP1057366A1 Microphone apparatus for producing signals for surround reproduction
11/2000
11/30/2000WO2000072589A1 Home entertainment system audio handling.
11/30/2000WO2000047018A3 Compatible matrix encoded surround-sound channels in a discrete digital sound format
11/29/2000EP1056310A2 Automotive audio system
11/29/2000CN1275301A Audio signal processor and audio device
11/28/2000US6154553 Sound bubble structures for sound reproducing arrays
11/28/2000US6154549 Method and apparatus for providing sound in a spatial environment
11/28/2000US6154161 Integrated audio mixer
11/22/2000EP1054575A2 Directional decoding
11/07/2000US6144747 Head mounted surround sound system
10/2000
10/17/2000CA2260222C Coding and decoding of audio signals by using intensity stereo and prediction
10/12/2000WO2000060746A2 Matrixing for losseless encoding and decoding of multichannels audio signals
10/12/2000CA2742649A1 Matrix improvements to lossless encoding and decoding
10/10/2000US6129283 Information reproduction apparatus for optically reading a code pattern from a recording medium and outputting desired information pieces of the read code pattern
10/05/2000WO2000059265A1 Matrix surround decoder/virtualizer
10/05/2000DE19914805A1 Soundsystem für ein Kraftfahrzeug und Verfahren zur Initialisierung eines solchen Sound system for a motor vehicle and method for initialization of such a
10/04/2000EP1040965A1 Vehicle sound system and initialisation method
10/04/2000EP1040466A2 Surround signal processing apparatus and method
09/2000
09/30/2000CA2267579A1 Matrix surround decoder/virtualizer
09/27/2000CN1268015A Sound signal processing
09/21/2000WO2000056093A1 Wcdma mobile device of transmissible multi-channel sounds
09/21/2000WO2000022876A9 Point source speaker system
09/20/2000EP1037505A2 Audio equipment and method of displaying operation thereof
09/20/2000EP1037504A2 Audio equipment and method of displaying operation thereof
09/20/2000EP1037503A2 Audio equipment and method of displaying operation thereof
09/19/2000US6122382 System for processing audio surround signal
09/19/2000US6122381 Stereophonic sound system
09/12/2000US6118876 Surround sound speaker system for improved spatial effects
09/12/2000US6118821 Compressed code decoding device and audio decoding device
08/2000
08/29/2000US6111959 Sound spreader
08/23/2000CN1264533A Method and apparatus for encoding and decoding multiple audio channels at low bit rates
08/22/2000US6108430 Headphone apparatus
08/22/2000US6107886 High-efficiency power amplifier
08/10/2000WO2000047018A2 Compatible matrix encoded surround-sound channels in a discrete digital sound format
08/09/2000EP1025743A1 Utilisation of filtering effects in stereo headphone devices to enhance spatialization of source around a listener
07/2000
07/20/2000WO2000042819A1 A stereophonic spatial expansion circuit with tonal compensation and active matrixing
07/20/2000WO2000042818A1 A stereophonic spatial expansion circuit with tonal compensation and active matrixing
07/20/2000WO2000021337A3 Integrated audio mixer with alternating quantization output
07/20/2000DE19900961A1 Verfahren und Vorrichtung zur Wiedergabe von Mehrkanaltonsignalen A method and apparatus for reproducing multi-channel audio
07/19/2000EP1021063A2 Audio signal processing
07/19/2000EP1021062A2 Method and apparatus for the reproduction of multi-channel audio signals
07/12/2000CN1259800A Sound coding device and decoding device, optical recording medium and sound transmission method
07/05/2000EP1016320A2 Method and apparatus for encoding and decoding multiple audio channels at low bit rates
06/2000
06/28/2000EP1014756A2 Method and apparatus for loudspeaker with positional 3D sound
06/28/2000EP1013140A1 5-2-5 matrix encoder and decoder system
06/28/2000EP1013018A1 Multichannel spectral mapping audio apparatus and method
06/28/2000EP0873667A4 Sound system
06/21/2000CN1257639A Audiochannel mixing
06/14/2000CN1256851A Surround sound reproduction system, sound/visual reproduction system, surround signal processing unit and method for processing input surround signal
06/13/2000US6076062 Method and device for transferring and decoding a non-PCM bitstream between a digital video disc and a multi-channel reproduction apparatus
06/13/2000US6075868 Apparatus for the creation of a desirable acoustical virtual reality
06/07/2000EP0632944B1 Process for transmitting or storing digitalized, multi-channel audio signals
06/06/2000US6072879 Sound field control unit and sound field control device
06/06/2000US6072878 Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics
05/2000
05/31/2000CN1255036A Multitone ring and driver transducer
05/31/2000CN1053079C Equipment and method for producing multi-channel sound with two loudspeakers
05/30/2000US6069962 Point source speaker system
05/24/2000EP0788723B1 Method and apparatus for efficient presentation of high-quality three-dimensional audio
05/24/2000CN2379987Y Round sound treatment device for small sized bass voice box y
05/24/2000CN1254161A Mutli-channel voice frequency reproduction equipment
05/23/2000US6067360 Apparatus for localizing a sound image and a method for localizing the same
05/23/2000US6067072 Audio equipment and method of displaying operating thereof
05/17/2000EP1001654A2 Sound signal mixing
05/17/2000EP1001549A2 Audio signal processing apparatus
05/17/2000EP1001421A2 Multi-channel audio reproducing device
05/17/2000CN1253464A 3D sound regeneration equipment and method for many listeners
05/10/2000CN1252653A Wide band movable CDMA equipment capable of transmitting multichannel sound
04/2000
04/27/2000WO2000024226A1 Surround-sound system
04/20/2000WO2000022876A1 Point source speaker system
04/20/2000DE19847689A1 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
04/18/2000US6052470 System for processing audio surround signal
04/13/2000WO2000021337A2 Integrated audio mixer with alternating quantization output
04/13/2000WO1999048327A9 In-home theater surround sound speaker system
04/13/2000CA2344890A1 Integrated audio mixer with alternating quantization output
04/12/2000CN1250346A Audible signal processing circuit
04/12/2000CN1250293A Decoding device and method for compressed multiple-track audio bit element flow
04/06/2000WO2000019415A2 Method and apparatus for three-dimensional audio display
04/06/2000WO2000019413A1 Multi-channel signal encoding and decoding
04/05/2000EP0990370A1 Reproduction of spatialised audio
04/05/2000EP0990369A2 Sound reproduction system
03/2000
03/30/2000WO2000018031A1 Method and device for developing a virtual speaker distant from the sound source
03/30/2000CA2345336A1 Method and device for developing a virtual speaker distant from the sound source
03/08/2000EP0984667A2 Method and apparatus for efficient presentation of high-quality three-dimensional audio
02/2000
02/09/2000CN1244084A Device and method for simulating multi-channel signals
02/08/2000US6023490 Encoding apparatus for encoding a plurality of information signals
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