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)
01/2004
01/15/2004US20040008851 Digital compressor for multi-channel audio system
01/15/2004US20040008847 Method and apparatus for producing multi-channel sound
01/14/2004EP1381254A2 Method and apparatus for producing multi-channel sound
01/14/2004EP1380189A2 Sound processing
01/08/2004WO2003075609A3 User controlled multi-channel audio conversion system
01/08/2004WO2003030589A3 Sound reproduction systems
01/08/2004WO2002078388A3 Method and apparatus to create a sound field
01/08/2004US20040005068 Dynamic normalization of sound reproduction
01/07/2004CN1134206C Sound-reproducing device earphone device and signal processing device therefor
01/02/2004EP1377124A2 Multi-source surround audio apparatus
01/02/2004EP1377123A1 Equalization for audio mixing
01/02/2004EP1377122A2 Sound data delay unit
01/02/2004EP1377114A2 Multi-channel reproducing apparatus and multi-channel reproducing loudspeaker apparatus
01/02/2004EP1376538A1 Hybrid multi-channel/cue coding/decoding of audio signals
01/01/2004US20040001596 Sound data delay unit
01/01/2004US20040001403 Multi-source surround audio apparatus
12/2003
12/31/2003WO2004002192A1 System and method for automatic room acoustic correction
12/31/2003WO2004001699A2 Method for enhancement of listener perception of sound spatialization
12/31/2003WO2003071827A3 Compact surround-sound system
12/31/2003WO2003034788A3 Method of multiplexed audio signals
12/31/2003CN2596505Y Integrated multichannel audio-video signal transmission device
12/25/2003US20030236583 Hybrid multi-channel/cue coding/decoding of audio signals
12/25/2003US20030235318 System and method for automatic room acoustic correction in multi-channel audio environments
12/25/2003US20030235317 Equalization for audio mixing
12/24/2003WO2003088711A3 Loudspeaker with gps receiver
12/24/2003CN1132154C 多信道信号编码和解码 Multichannel signal coding and decoding
12/24/2003CN1132151C Multi-channel sound decoder
12/23/2003US6668061 Crosstalk canceler
12/18/2003WO2003086017A3 Signal processing
12/18/2003US20030231774 Method and apparatus for preserving matrix surround information in encoded audio/video
12/17/2003EP1372356A1 Method for reproducing a plurality of mutually unrelated sound signals, especially in a motor vehicle
12/17/2003EP1371268A2 System and method for automatically adjusting the sound and visual parameters of a home theatre system
12/17/2003EP1371267A2 Method of reproducing multichannel sound using real and virtual speakers
12/17/2003EP1371266A2 Method of deriving a head-related transfer function
12/17/2003EP1371265A2 Signal processing apparatus, signal processing method, program and recording medium
12/17/2003CN1131594C Sound coding device, and decoding device, optical recording medium and sound transmission method
12/16/2003US6662560 Motion transducer efficient for small amplitude movements
12/11/2003WO2003103336A2 Method and system for audio imaging
12/10/2003EP1370115A2 Sound image control system
12/10/2003EP1370114A2 Matrix improvements to lossless encoding and decoding
12/10/2003CN1130719C Multi-channel voice frequency reproduction equipment
12/09/2003US6661737 Acoustic logging tool having programmable source waveforms
12/09/2003US6659773 Motion transducer system
12/04/2003WO2003059005A3 Digital loudspeaker system
12/04/2003WO2002098172A3 Method of generating a left modified and a right modified audio signal for a stereo system
12/04/2003US20030223603 Sound space replication
12/04/2003US20030223602 Method and system for audio imaging
12/03/2003EP1173925B1 Matrixing for lossless encoding and decoding of multichannels audio signals
12/02/2003US6658117 Sound field effect control apparatus and method
11/2003
11/27/2003WO2002091798A3 Data-driven software architecture for digital sound processing and equalization
11/27/2003WO2002078396B1 System and method for automatically adjusting the sound and visual parameters of a home theatre system
11/27/2003WO2002054823A3 Apparatus, system and method for capturing sound
11/27/2003US20030219137 Vehicle sound system
11/26/2003EP1365629A1 Headphone-use stereophonic device and voice signal processing program
11/26/2003CN1459214A Method of reproducing multichannel audio sound via several real and at least one virtual speaker
11/20/2003WO2003096746A1 Audio apparatus and its reproduction program
11/20/2003WO2003096529A1 Audio distribution system
11/20/2003WO2003060559A3 Acoustic logging tool having programmable source waveforms
11/20/2003US20030215103 Parametric virtual speaker and surround-sound system
11/19/2003EP1362499A2 Method for apparatus for audio matrix decoding
11/19/2003CN1457216A Digital set style echo effect decoder
11/13/2003WO2003094576A1 Transmission characteristic measuring device, transmission characteristic measuring method, and amplifier
11/13/2003WO2003094396A2 Discrete surround audio system for home and automotive listening
11/13/2003WO2003094369A2 Multi-channel downmixing device
11/13/2003US20030210800 Sound reproducing device, earphone device and signal processing device therefor
11/13/2003US20030210796 Wired, wireless, infrared, and powerline audio entertainment systems
11/13/2003US20030210794 Matrix surround decoding system
11/13/2003CA2773294A1 Sound detection and localization system
11/12/2003EP1360874A2 Sound system and method of sound reproduction
11/11/2003US6647119 Spacialization of audio with visual cues
11/06/2003WO2003092260A2 Method and apparatus for preserving matrix surround information in encoded audio/video
11/06/2003US20030206639 Discrete surround audio system for home and automotive listening
10/2003
10/30/2003WO2003090208A1 pARAMETRIC REPRESENTATION OF SPATIAL AUDIO
10/30/2003WO2003090207A1 Parametric multi-channel audio representation
10/30/2003WO2003090206A1 Signal synthesizing
10/30/2003WO2002099727A3 Apparatus and method for down converting multichannel programs to dual channel programs using a smart coefficient generator
10/29/2003CN1452851A Multi-channel surround sound mastering and reproduction techniques that preserve spatial harmonics in three dimensions
10/29/2003CN1452850A Dynamic power sharing in multi-channel sound system
10/29/2003CN1452433A Design of automated sound system
10/23/2003WO2003088711A2 Loudspeaker with gps receiver
10/23/2003WO2003028407A3 Method and apparatus for multichannel logic matrix decoding
10/23/2003WO2003022003A3 Audio reproducing device
10/23/2003US20030198353 Automated sound system designing
10/23/2003US20030198352 Reciprocal index lookup for BTSC compatible coefficients
10/22/2003EP1355514A2 Automated sound system designing
10/22/2003EP1354495A2 Method of decoding two-channel matrix encoded audio to reconstruct multichannel audio
10/22/2003EP1353736A2 Motion transducer system
10/22/2003CN1451255A Discrete multichannel audio with a backward compatible mix
10/16/2003WO2003086017A2 Signal processing
10/16/2003WO2003061343A3 Surround-sound system
10/09/2003US20030190047 Headphones with integrated microphones
10/08/2003EP1350250A2 Audio reproducing device
10/02/2003WO2002078389A3 Method of deriving a head-related transfer function
10/01/2003CN1445749A Effect adminitering equipment for controlling two-dimension voice image positioning
10/01/2003CN1123219C Television set comprising loudspeaders and decoder with surround sound audio signals
09/2003
09/30/2003US6628787 Wavelet conversion of 3-D audio signals
09/25/2003WO2002019768A3 Method for apparatus for audio matrix decoding
09/25/2003US20030182002 Multi-channel acoustic apparatus with DVD reproduction function
09/24/2003EP1347668A2 Effect imparting apparatus for controlling two-dimensional sound image localization
09/24/2003CN1122253C Surround stereo signal processing appts and method
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