| Patents for H04S 1 - Two-channel systems (4,182) |
|---|
| 09/07/1999 | US5949894 Adaptive audio systems and sound reproduction systems |
| 09/07/1999 | US5948052 Apparatus using a logarithm based processor and an audio amplifier |
| 09/01/1999 | EP0938832A1 Method and device for projecting sound sources onto loudspeakers |
| 09/01/1999 | EP0938831A1 Hearing-adapted quality assessment of audio signals |
| 09/01/1999 | EP0938709A1 System and method for scheduling and processing image and sound data |
| 08/31/1999 | US5946402 Signal processing device for processing sound quality, and recording apparatus, reproducing apparatus and mixing apparatus provided with the signal processing device applied thereto |
| 08/31/1999 | US5946400 Three-dimensional sound processing system |
| 08/24/1999 | US5943427 In a digital sound generation system |
| 08/19/1999 | WO1999041947A1 Surround sound reproduction system, sound/visual reproduction system, surround signal processing unit and method for processing an input surround signal |
| 08/12/1999 | WO1999040756A1 Headphone apparatus |
| 08/10/1999 | US5937071 Sound field expanding apparatus with improved tone control system |
| 08/04/1999 | EP0933006A1 Transaural stereo device |
| 08/04/1999 | EP0746960B1 Binaural synthesis, head-related transfer functions, and uses thereof |
| 08/04/1999 | EP0677235B1 Sound image manipulation apparatus for sound image enhancement |
| 08/03/1999 | CA2196779C Method and apparatus for spatially enhancing stereo and monophonic signals |
| 07/28/1999 | EP0932325A2 Apparatus and method for localizing sound image |
| 07/28/1999 | EP0932324A2 Sound reproducing device, earphone device and signal processing device therefor |
| 07/27/1999 | US5930733 Stereophonic image enhancement devices and methods using lookup tables |
| 07/20/1999 | US5926553 Method for measuring the conservation of stereophonic audio signals and method for identifying jointly coded stereophonic audio signals |
| 07/20/1999 | US5926332 Digital sound reproducing and editing device for recording sound with fixed editing points |
| 07/15/1999 | WO1999035885A1 Sound image localizing device |
| 07/15/1999 | WO1999035881A1 Loudspeaker device and method for driving the same, and audio signal transmitter/receiver |
| 07/13/1999 | US5923766 Low frequency audio conversion circuit |
| 07/13/1999 | US5923576 Parallel recursive digital filters |
| 07/08/1999 | WO1999034527A1 Method and apparatus for estimation of coupling parameters in a transform coder for high quality audio |
| 07/06/1999 | US5920632 Apparatus for continuously switching a demodulator from stereo operation to mono operation, and vice versa |
| 07/01/1999 | WO1999033325A2 Surround signal processing apparatus and method |
| 07/01/1999 | WO1999033194A1 Method and apparatus for phase estimation in a transform coder for high quality audio |
| 07/01/1999 | WO1999033173A1 Method and system for driving speakers with a 90 degree phase shift |
| 06/30/1999 | CN1043944C Switched signal processing circuit |
| 06/29/1999 | US5917923 Loudspeaker system |
| 06/29/1999 | US5917916 Audio reproduction systems |
| 06/24/1999 | WO1999031938A1 A method of processing an audio signal |
| 06/23/1999 | EP0924962A1 Encoding method and device, decoding method and device, and recording medium |
| 06/23/1999 | EP0923847A1 A circuit arrangement for creating phantom sources in a stereo signal using shifting circuitry |
| 06/23/1999 | EP0923846A1 Creating an expanded stereo image using phase shifting circuitry |
| 06/22/1999 | US5915028 Amplitude demodulator |
| 06/17/1999 | WO1999030532A1 Apparatus for the creation of a desirable acoustical virtual reality |
| 06/17/1999 | WO1999009787A8 A distributed stereo system |
| 06/16/1999 | EP0923252A2 Synchronization device for decoders |
| 06/16/1999 | CN1219807A Synchronization device |
| 06/15/1999 | US5912975 Method and circuit for creating phantom sources using phase shifting circuitry |
| 06/15/1999 | CA2161263C Process for determining the type of coding to be selected for coding at least two signals |
| 06/08/1999 | US5910990 Apparatus and method for automatic equalization of personal multi-channel audio system |
| 06/02/1999 | EP0919109A1 Recording and play-back two-channel system for providing a holophonic reproduction of sounds |
| 06/02/1999 | EP0919096A1 Method for cancelling multichannel acoustic echo and multichannel acoustic echo canceller |
| 05/27/1999 | WO1999026454A1 Low-frequency audio simulation system |
| 05/26/1999 | CN1217627A Acoustic-image positioning treatment apparatus and method thereof |
| 05/20/1999 | WO1999025151A1 Audio system comprising audio signal processing circuit |
| 05/19/1999 | EP0917400A2 An apparatus for localizing a sound image and a method for localizing the same |
| 05/19/1999 | EP0917399A2 Method for creating audio data with special effects |
| 05/19/1999 | EP0649589B1 Adaptive audio systems and sound reproduction systems |
| 05/11/1999 | US5903853 Radio transceiver including noise suppressor |
| 05/05/1999 | CN1216178A Data compression/expansion on plurality of digital information signals |
| 04/29/1999 | WO1999021164A1 A method and a system for processing a virtual acoustic environment |
| 04/28/1999 | EP0912077A2 Binaural synthesis, head-related transfer functions, and uses therof |
| 04/28/1999 | EP0912076A2 Binaural synthesis, head-related transfer functions, and uses thereof |
| 04/28/1999 | EP0910928A1 Coding and decoding of audio signals by using intensity stereo and prediction processes |
| 04/28/1999 | EP0910927A1 Process for coding and decoding stereophonic spectral values |
| 04/28/1999 | CN2316790Y Two-sound channel three-dimensional stereophony processor |
| 04/22/1999 | DE19742655A1 Verfahren und Vorrichtung zum Codieren eines zeitdiskreten Stereosignals A method and apparatus for coding a time-discrete stereo signal |
| 04/20/1999 | US5896457 Light enhanced sound device and method |
| 04/20/1999 | US5896456 Automatic stereophonic manipulation system and apparatus for image enhancement |
| 04/20/1999 | US5896358 Audio system which not only enables the application of the surround system standard to special playback uses but also easily maintains compatibility with a surround system |
| 04/20/1999 | US5896215 Multi-channel system with multiple information sources |
| 04/14/1999 | EP0908019A1 Acoustic heterodyne device and method |
| 04/08/1999 | WO1999017587A1 Process and device for coding a time-discrete stereo signal |
| 04/08/1999 | WO1999004602A3 Method and apparatus for two channels of sound having directional cues |
| 04/06/1999 | US5892831 Method and circuit for creating an expanded stereo image using phase shifting circuitry |
| 04/06/1999 | US5892830 Stereo enhancement system |
| 03/31/1999 | EP0904637A1 Data compression/expansion on a plurality of digital information signals |
| 03/31/1999 | EP0730812B1 Apparatus for processing binaural signals |
| 03/31/1999 | CN1212599A Apparatus for recording sound having function of recording stereophonic sound and method therefor |
| 03/30/1999 | US5889870 Acoustic heterodyne device and method |
| 03/30/1999 | US5889867 Stereophonic Reformatter |
| 03/25/1999 | WO1999014983A1 Utilisation of filtering effects in stereo headphone devices to enhance spatialization of source around a listener |
| 03/25/1999 | WO1999014735A2 Acoustic signal reproducing apparatus |
| 03/24/1999 | EP0903055A1 Method and apparatus for localization of an acoustic source |
| 03/23/1999 | CA2053552C Method and apparatus for determining phase correlation of a stereophonic signal |
| 03/16/1999 | US5883962 Method and apparatus for spatially enhancing stereo and monophonic signals |
| 03/11/1999 | WO1998058522A3 Sound reproduction system |
| 03/03/1999 | CN1209718A Acoustic-field correction circuit |
| 03/02/1999 | US5878145 Electronic circuit and process for creation of three-dimensional audio effects and corresponding sound recording |
| 02/25/1999 | WO1999009787A1 A distributed stereo system |
| 02/25/1999 | WO1999009648A2 Infinite impulse response filter for 3d sound with tap delay lineinitialization |
| 02/18/1999 | WO1999008380A1 Improved listening enhancement system and method |
| 02/17/1999 | EP0791279B1 Loudspeaker system with controlled directional sensitivity |
| 02/16/1999 | US5873065 Two-stage compression and expansion of coupling processed multi-channel sound signals for transmission and recording |
| 02/16/1999 | US5872851 Dynamic stereophonic enchancement signal processing system |
| 02/10/1999 | EP0896498A2 Audio signal processing apparatus and audio signal processing method for multi channel audio reproduction system |
| 02/10/1999 | CN1042087C Loudspeaker system |
| 02/03/1999 | CN1207234A Arrangement, system, circuit and method for enhancing a stereo image |
| 01/28/1999 | WO1999004602A2 Method and apparatus for two channels of sound having directional cues |
| 01/27/1999 | CN1206323A Acoustic image positioning device |
| 01/21/1999 | DE19731122A1 Loudspeaker for professional PA system |
| 01/19/1999 | US5862230 Method to reduce perceived sound leakage between auditoriums in multiplex theaters |
| 01/19/1999 | US5862229 Sound generator synchronized with image display |
| 01/19/1999 | US5862227 Sound recording and reproduction systems |
| 01/13/1999 | EP0890295A1 Apparatus for processing stereophonic signals |
| 01/12/1999 | US5860060 Method for left/right channel self-alignment |