| Patents for H04S 1 - Two-channel systems (4,182) |
|---|
| 12/09/1993 | WO1993025054A1 Digital stereo sound enhancement unit and method |
| 12/09/1993 | WO1993025015A1 Process for reducing data in the transmission and/or storage of digital signals from several interdependent channels |
| 12/09/1993 | WO1993024994A1 Back-masking effect generator |
| 12/01/1993 | EP0571635A1 Device for correcting frequency characteristic of sound field |
| 11/24/1993 | EP0570508A1 Am-fm combined stereo receiver |
| 11/16/1993 | US5263086 Audio accessory circuit |
| 11/16/1993 | US5261757 Shaft mount for data coupler system |
| 11/10/1993 | EP0568789A2 Digital signal processing apparatus employed in electronic musical instruments |
| 10/26/1993 | US5257253 Laser vision disc with digital sound (LDD) disc player for reproducing analog audio signals mixed with digital audio signals |
| 10/19/1993 | US5255326 Interactive audio control system |
| 10/06/1993 | EP0563832A1 Stereo audio encoding apparatus and method |
| 09/30/1993 | DE4307008A1 Acoustic field corrector using cascaded delay circuits - operates by addn. of outputs of cascaded combinations of echo-generating delay stages and coefft. multipliers |
| 09/14/1993 | US5245663 Method of simulating the sound of an input audio signal |
| 09/08/1993 | EP0559530A1 Method and system for artificial spatial processing of digital audio signals |
| 08/31/1993 | US5241604 Sound effect apparatus |
| 08/31/1993 | CA1321756C Sound field reproducing apparatus |
| 08/19/1993 | DE4204207A1 Deriving mono signal from stereo two channel input - placing microphone in suitable pick-up space between spherical loudspeakers |
| 08/10/1993 | US5235646 Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby |
| 08/04/1993 | EP0553832A1 Sound field controller |
| 08/03/1993 | US5233661 Sound field variable apparatus |
| 07/22/1993 | WO1993014606A1 Loudspeaker system |
| 07/22/1993 | CA2117383A1 Loudspeaker system |
| 07/13/1993 | US5228085 Perceived sound |
| 07/07/1993 | EP0549836A1 Multi-dimensional sound reproduction system |
| 07/06/1993 | CA1319891C Electro-acoustical system |
| 06/16/1993 | EP0546619A2 Low frequency audio doubling and mixing circuit |
| 06/09/1993 | DE4241130A1 Producing two channel sound field - using successive addition and subtraction of initial front and rear left and right signals to obtain left and right channel signals for headphones |
| 05/25/1993 | US5214705 Circuit and method for communicating digital audio information |
| 05/21/1993 | WO1992010918A1 Signal processor for recreating original audio signals |
| 05/13/1993 | WO1993009645A1 Process for simultaneously transmitting signals from n-signal sources |
| 05/13/1993 | WO1993009644A1 Process for reducing data in the transmission and/or storage of digital signals from several dependent channels |
| 05/13/1993 | DE4237710A1 Improving head related sound characteristics for TV audio signal playback - using controlled audio signal processing for conversion into stereo audio signals |
| 05/12/1993 | EP0541030A2 Audio reproducing apparatus |
| 05/11/1993 | US5210796 Stereo/monaural detection apparatus |
| 05/06/1993 | DE4135977A1 Verfahren zur gleichzeitigen uebertragung von signalen aus n-signalquellen Process for the simultaneous transmission of signals from n-signal sources |
| 05/04/1993 | US5208860 Sound imaging method and apparatus |
| 04/27/1993 | US5206910 Stereo microphone unit |
| 04/15/1993 | DE4133393A1 Stereo bass width regulation circuit - uses transformer and variable resistance preventing coupling between stereo end amplifiers |
| 04/07/1993 | EP0535435A2 A circuit and method for receiving and transmitting control and status information |
| 04/07/1993 | EP0535434A2 A circuit and method for communicating digital audio information |
| 04/06/1993 | US5201005 Sound field compensating apparatus |
| 03/10/1993 | EP0530916A2 Encoding method and encoding system comprising a subband coder for subband coding of a wideband digital signal constituted by first and second signal components |
| 03/10/1993 | EP0530711A1 Recording medium playing apparatus and compound AV system including such a playing apparatus |
| 03/03/1993 | EP0262160B1 Stereo enhancement system |
| 02/16/1993 | US5187692 Acoustic transfer function simulating method and simulator using the same |
| 02/03/1993 | EP0526136A2 System for calibrating sound field |
| 01/19/1993 | US5181248 Acoustic signal reproducing apparatus |
| 01/19/1993 | US5181247 Sound image enhancing |
| 12/29/1992 | US5175768 Method and apparatus for enhancing the stereo effect in headsets having cross coupling voice coils |
| 12/09/1992 | CN1066951A Series connection in the same direction stereo reproducing system |
| 11/24/1992 | CA1310747C Sound field expansion system for a video tape recorder |
| 11/17/1992 | US5164840 Apparatus for supplying control codes to sound field reproduction apparatus |
| 10/20/1992 | CA1309031C Stereo enhancement and directivity servo |
| 10/13/1992 | US5155770 Surround processor for audio signal |
| 10/08/1992 | DE4110902A1 Stereo headphones with adjustable frequency response - use directional pattern of outer ear and post equalises response of headphone sound transducers by rotation of transducer positions |
| 10/06/1992 | US5153362 Electronic musical instrument having pan control function |
| 09/30/1992 | EP0505949A1 Acoustic transfer function simulating method and simulator using the same |
| 09/09/1992 | CN1018232B Multidimensional stereophonic sound reproduction system |
| 09/01/1992 | US5144670 Sound output system |
| 08/27/1992 | DE4204289A1 Digital processing system to improve sound reproduction - provides delay of signals to compensate for reflection effects with signal coefficients set by computer |
| 08/26/1992 | EP0500294A2 Stereophonic sound reproducing apparatus |
| 08/26/1992 | EP0499729A1 Sound imaging apparatus for a video game system |
| 08/25/1992 | US5142586 Electro-acoustical system |
| 08/18/1992 | US5140637 Device and method for removing vocal signals |
| 08/07/1992 | WO1992014312A1 Am-fm combined stereo receiver |
| 08/04/1992 | US5136651 Head diffraction compensated stereo system |
| 07/07/1992 | US5129004 Automotive multi-speaker audio system with different timing reproduction of audio sound |
| 07/02/1992 | DE4136022A1 Stereo acoustic field expansion and asymmetry correction appts. - applies phase and level corrections to digitised channel signals for crosstalk adjustment with buffering and delay |
| 06/23/1992 | CA1304005C Stereo expansion circuit selection switch |
| 06/16/1992 | US5123050 Sound field control system |
| 06/02/1992 | US5119420 Device for correcting a sound field in a narrow space |
| 05/27/1992 | EP0487181A2 Sound field compensating apparatus |
| 05/26/1992 | CA1301660C Three-dimensional auditory display apparatus and method utilizing enhanced bionic emulation of human binaural sound localization |
| 05/13/1992 | EP0485222A2 Stereo monaural detection apparatus with differential and add components detection |
| 05/13/1992 | EP0484354A1 Stereo headphone for the "in front" location of auditory events generated by stereo headphones. |
| 04/28/1992 | US5109542 AM-FM combined stereo receiver |
| 04/28/1992 | US5109415 Audio signal processing system performing balance control in both amplitude and phase of audio signal |
| 04/22/1992 | EP0481821A2 Method and apparatus for determining phase correlation of a stereophonic signal |
| 04/21/1992 | US5107134 Matrix circuit of fm stereo multiplex demodulation circuit |
| 04/21/1992 | CA1299111C Stereo synthesizer |
| 04/14/1992 | US5105462 Sound imaging method and apparatus |
| 04/08/1992 | EP0479604A2 Method and apparatus for presentation of on-line directional sound |
| 04/08/1992 | EP0479410A1 Sound field compensating apparatus for a small room |
| 04/08/1992 | EP0479395A2 Stereo enhancement system |
| 04/08/1992 | EP0478615A1 Polyphonic coding. |
| 04/01/1992 | EP0478096A2 Stereo enhancement system |
| 03/31/1992 | CA1298208C Extended imaging split mode loudspeaker system |
| 03/25/1992 | EP0476934A2 Surround processor for audio signal |
| 03/25/1992 | EP0476790A2 Stereo enhancement system |
| 03/17/1992 | CA1297417C Head diffraction compensated stereo system |
| 03/11/1992 | EP0474548A1 Method and apparatus for improving the reproduction quality of stereophonic ambience sound |
| 03/05/1992 | CA2050622A1 Method and device for improving the reproduction quality of stereo ambience sound |
| 02/19/1992 | EP0471241A1 Processing device with automatic sound equaliser |
| 02/05/1992 | CN1058502A Surround sound effect control device |
| 01/22/1992 | EP0467256A2 Surround sound effect control device |
| 01/21/1992 | US5083311 Sound field producing apparatus |
| 01/15/1992 | EP0465662A1 Apparatus for reproducing acoustic signals |
| 01/15/1992 | EP0465460A1 Signal enhancement processor for stereo system. |
| 01/08/1992 | EP0464217A1 Apparatus for reproducing acoustic signals |
| 12/26/1991 | WO1991020164A1 Method for eliminating the precedence effect in stereophonic sound systems and recording made with said method |