Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 1 - Two-channel systems
Patents for H04S 1 - Two-channel systems (4,182)
10/2003
10/22/2003CN1451254A Infrabass
10/22/2003CN1450833A Double-voice coil counter-connection coupling moving-coil loudspeaker
10/19/2003CA2424157A1 Enhanced sound processing system for use with sound radiators
10/16/2003WO2003086007A2 Audio distribution
10/16/2003WO2003085824A2 Sound level limiter for electro-acoustic devices
10/16/2003US20030195584 Method and system for forming an acoustic signal from neural timing difference data
10/15/2003CN2580717Y Wireless transmission type surrounding combined acoustic equipment
10/14/2003CA2261108C Acoustic heterodyne device and method
10/09/2003WO2002026000A3 A method of synthesising an approximate impulse response function
10/09/2003US20030190047 Headphones with integrated microphones
10/07/2003US6631193 Audio system enhancement using psycho acoustic matrix
10/01/2003EP1230827B1 Method and device for processing a stereo audio signal
10/01/2003CN1122964C Method and system for processing virtual acoustic environment
09/2003
09/30/2003US6629078 Apparatus and method of coding a mono signal and stereo information
09/25/2003WO2003079724A1 Sound image localization signal processing apparatus and sound image localization signal processing method
09/25/2003WO2003078204A2 Loudspeaker arrangement for stereo reception in vehicles, particularly in passenger vehicles
09/25/2003WO2003015471A3 Device and method for simulation of the presence of one or more sound sources in virtual positions in three-dimensional acoustic space
09/24/2003CN1444418A Equipment for providing high tone quality by utilizing intermediate value filter in sound system
09/24/2003CN1122253C Surround stereo signal processing appts and method
09/23/2003US6625286 Precise amplitude correction circuit
09/17/2003EP1004222A4 A distributed stereo system
09/16/2003US6621906 Sound field generation system
09/12/2003WO2003023970A3 Serial data interface with reduced power consumption
09/11/2003US20030172097 Audio frequency response processing system
09/11/2003US20030169887 Reverberation generating apparatus with bi-stage convolution of impulse response waveform
09/10/2003CN1442029A Stereo audio processing device for deriving auxiliary audio signals such as direction and centre audio signals
09/10/2003CN1442003A Method and means for receiving digital transmission comprising plurality of digital audio signals and for simultaneous reproduction of these signals as analog audio programmes
09/04/2003WO2002062103B1 Audio sound quality enhancement apparatus
09/03/2003EP1341398A1 Portable audio system
09/03/2003CN2571097Y Speaker unit
09/03/2003CN1440629A System and method for optimization of three-dimensional audio
09/03/2003CN1440217A FPGA 5.1 channel virtual speech reproducing method and device
09/02/2003US6614912 Sound reproducing device, earphone device and signal processing device therefor
09/02/2003US6614910 Stereo sound expander
09/02/2003US6614365 Coding device and method, decoding device and method, and recording medium
08/2003
08/28/2003US20030163303 Memory sharing scheme in audio post-processing
08/28/2003US20030161479 Audio post processing in DVD, DTV and other audio visual products
08/28/2003US20030161478 Sound reproduction systems
08/21/2003WO2003058473A8 Interactive spatalized audiovisual system
08/21/2003WO2002076148A3 Apparatus and method for adaptive signal characterization and noise reduction in hearing aids and other audio devices
08/21/2003US20030156075 Electronic device
08/20/2003CN1119070C Arrangement, system, circuit and method for enhancing stereo-image
08/19/2003US6608902 Stereo signal separation circuit and application thereof
08/13/2003CN1118019C Sound generation device synchronous with picture display
08/12/2003US6606388 Method and system for enhancing audio signals
08/07/2003WO2002065815A3 Sound system and method of sound reproduction
07/2003
07/31/2003WO2003063547A2 Method for reducing the noise in a stereo broadcast radio receiver, and stereo broadcast radio receiver
07/31/2003WO2003063346A2 A method for decreasing the dynamic range of a signal and electronic circuit
07/31/2003US20030144755 Method for processing and reproducing audio signal at desired sound quality, reduced data volume or adjusted output level, apparatus for processing audio signal with sound quality control information or test tone signal or at reduced data volume, recording medium for recording audio signal with sound quality control information or test tone signal or at reduced data volume, and apparatus for reproducing audio signal at desired sound quality, reduced data volume or adjusted output level
07/31/2003US20030142842 Vehicle-mounted stereophonic sound field reproducer
07/31/2003US20030142839 Transmitting and reproducing stereophonic audio signals
07/31/2003US20030142835 Sound output apparatus for an automotive vehicle
07/30/2003CN1116784C Method and device for projecting sound sources onto loudspeakers
07/30/2003CN1116737C User adjustable volume control that accommodates hearing
07/24/2003WO2003061344A2 Multichannel echo canceller system using active audio matrix coefficients
07/24/2003WO2003060559A2 Acoustic logging tool having programmable source waveforms
07/24/2003US20030138110 Audio signal processing device, signal recovering device, audio signal processing method and signal recovering method
07/24/2003US20030138107 Generation of customised three dimensional sound effects for individuals
07/22/2003US6597791 Audio enhancement system
07/17/2003WO2003058473A1 Interactive spatalized audiovisual system
07/15/2003US6594368 DVE system with dynamic range processing
07/15/2003US6593809 Circuit for widening the stereobase in the reproduction of stereophonic sound signals
07/09/2003EP0990369B1 Sound reproduction system
07/08/2003US6591241 Selecting a coupling scheme for each subband for estimation of coupling parameters in a transform coder for high quality audio
07/08/2003US6590510 Sample rate converter
07/03/2003US20030123326 Acoustic logging tool having programmable source waveforms
07/03/2003US20030121403 Electronic tone generating apparatus and signal-processing-characteristic adjusting method
07/02/2003CN1113329C Vocal mix circuit
07/01/2003US6587566 Sound field forming circuit and sound field forming apparatus
07/01/2003US6587565 System for improving a spatial effect of stereo sound or encoded sound
06/2003
06/26/2003US20030118198 Biaxial parametric speaker
06/26/2003US20030118194 Multi-mode ambient soundstage system
06/26/2003US20030118192 Virtual sound image localizing device, virtual sound image localizing method, and storage medium
06/25/2003CN1426669A 多通道音频转换器 Multi-channel audio converter
06/25/2003CN1426267A Acoustic correction equipment
06/24/2003US6584357 Method and system for forming an acoustic signal from neural timing difference data
06/19/2003US20030114214 Gaming machine with ambient noise attenuation
06/18/2003EP1319323A2 A method of audio signal processing for a loudspeaker located close to an ear
06/18/2003EP1046239B1 Method and apparatus for phase estimation in a transform coder for high quality audio
06/18/2003EP1042866A4 Method and system for driving speakers with a 90 degree phase shift
06/18/2003CN2556886Y Loudspeaker box
06/18/2003CN2556885Y Sound with battery for outdoor activities
06/12/2003WO2003049498A2 Time scaling of stereo audio
06/12/2003WO2003049497A2 Circuit and method for enhancing a stereo signal
06/12/2003US20030108207 Phase conversion surround circuitry
06/10/2003US6578203 Audio/video signal distribution system for head mounted displays
06/10/2003US6577738 Parametric virtual speaker and surround-sound system
06/05/2003US20030105539 Time scaling of stereo audio
06/05/2003US20030103632 Adaptive sound masking system and method
06/04/2003EP1316240A1 A synchronised binaural hearing system
06/04/2003CN2554886Y Rotable spherical table audio device
06/04/2003CN2554885Y Split connecting piece of earphone
06/03/2003US6574602 Dual channel phase flag determination for coupling bands in a transform coder for high quality audio
06/03/2003US6574339 Three-dimensional sound reproducing apparatus for multiple listeners and method thereof
05/2003
05/28/2003CN1421113A Automatic mono/stereo detection
05/28/2003CN1420744A Method and apparatus of enhancing learning capacity
05/22/2003WO2002056635A3 High fidelity audio signal reproduction system and method of operation
05/21/2003EP0801855B1 Audio signal identification using digital labelling signals
05/21/2003CN2552281Y Acoustic system using wireless loadspeaker
05/21/2003CN1419796A Virtual sound image localizing device, virtual sound image localizing, and storage medium
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