Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 7 - Indicating arrangements; Control arrangements, e.g. balance control
Patents for H04S 7 - Indicating arrangements; Control arrangements, e.g. balance control (4,080)
03/1992
03/11/1992EP0474548A1 Method and apparatus for improving the reproduction quality of stereophonic ambience sound
03/05/1992CA2050622A1 Method and device for improving the reproduction quality of stereo ambience sound
02/1992
02/19/1992EP0471241A1 Processing device with automatic sound equaliser
02/04/1992CA1295262C Sum/differential signal processing circuit
01/1992
01/15/1992EP0466435A2 Surround audio apparatus
01/15/1992EP0465662A1 Apparatus for reproducing acoustic signals
01/08/1992EP0464607A2 Balance control circuit
12/1991
12/27/1991EP0462285A1 Acoustic reproducing device
12/26/1991WO1991020166A1 Apparatus and method for controlling the magnitude spectrum of acoustically combined signals
12/17/1991US5073944 Audio system for automotive vehicles
12/09/1991WO1991019407A1 Surround processor
12/09/1991CA2084512A1 Surround processor
11/1991
11/12/1991US5065432 Sound effect system
10/1991
10/09/1991EP0216862B1 Video display of two-channel audio signals
10/08/1991US5056148 Output circuit of audio device
09/1991
09/26/1991DE4008808A1 Setting system for spaced loudspeakers - allows individual adjustment of loudspeaker sound levels to obtain required sound centre
09/18/1991EP0446407A2 Circuit for preventing crosstalk
09/17/1991US5050214 Remote control circuit
09/17/1991CA1289080C Separation of l+r from l-r in btsc system
09/05/1991WO1991013497A1 Sound mixing device
09/03/1991US5046106 Varying loudspeaker spatial characteristics in a vehicle
08/1991
08/27/1991US5043970 Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround
08/22/1991WO1991012699A1 Circuit arrangement for modifying the output signals of a multi-channel electro-acoustic device
08/21/1991EP0442388A1 Circuit arrangement for modifying the output signal of a multi-channel acoustical apparatus
08/20/1991US5042070 Automatically configured audio system
08/13/1991US5040220 Control circuit for controlling reproduced tone characteristics
07/1991
07/24/1991EP0438317A2 Varying loudspeaker spatial characteristics in a vehicle
07/24/1991EP0438281A2 Acoustic signal reproducing apparatus
07/23/1991US5033577 Room sound reproducing
07/20/1991WO1991011079A1 Apparatus for reproducing acoustic signals
07/19/1991CA2033887A1 Varying loudspeaker spatial characteristics in a vehicle
07/16/1991US5033092 Stereophonic reproduction system
07/11/1991WO1991010335A1 Acoustic reproducing device
07/10/1991EP0436100A2 Method for controlling audio-visual equipment and apparatus therefor
07/02/1991US5027687 Basic audio signal
06/1991
06/18/1991US5025472 Reverberation imparting device
06/11/1991US5023914 Acoustical frequency response improving with non-minimum phase circuitry
06/08/1991CA2031665A1 Sound imaging apparatus for a video game system
06/05/1991EP0430341A2 Method for time-interleaved processing of data words and apparatus for using it
05/1991
05/16/1991DE4025973A1 Sound field corrector with sound effect generator(s) - has switches for generator left and right channel changeover
05/02/1991DE4033993A1 Digital audio recording medium - has auxiliary code used for automatic sound field control during playback of recorded audio signals
04/1991
04/18/1991DE4014394A1 Preventing faulty operation of audio changeover switch - uses decision step for testing stereo or mono mode of received signal
03/1991
03/19/1991US5001774 Stereo headphone remote control circuit
03/06/1991EP0415779A2 Multi-channel audio system
03/01/1991CA2023838A1 Enhancing bass
02/1991
02/27/1991EP0215951B1 Graphic balancer
01/1991
01/30/1991EP0410157A2 Signal processing system for use with an audio reproduction system
01/08/1991US4984273 Enhancing bass
01/08/1991US4983858 Level determining circuit generating output signal at first or second output terminal according to level of input signal
12/1990
12/27/1990EP0404117A2 Surround-sound system
12/25/1990US4980915 Center mode control circuit
12/05/1990EP0400106A1 Stereo enhancement and directivity servo.
10/1990
10/18/1990WO1990012476A1 Process and device for distribution of sound among several sound sources
10/18/1990DE3912582A1 Objective evaluation of headphone quality - employs graphs and experience guide data to determine ability to reproduce 3 dimensional sound without subjective factor
08/1990
08/28/1990US4953212 Auto voice changing apparatus
08/16/1990EP0381807A2 Method and apparatus for recording and reproducing information including plural channel audio signals
07/1990
07/03/1990US4939781 Device for eliminating absolute polarity inversion in a high-fidelity sound reproduction system
06/1990
06/13/1990EP0372830A2 Room sound reproducing
06/12/1990US4933768 Sound reproducer
06/06/1990CA2004581A1 Room sound reproducing
05/1990
05/17/1990WO1990005438A1 Stereo enhancement and directivity servo
05/09/1990EP0367569A2 Sound effect system
04/1990
04/19/1990WO1990004288A1 Relative time delay correction system utilizing window of zero correction
03/1990
03/14/1990EP0358295A2 Sum/differential signal processing circuit
03/14/1990EP0358189A2 Level determining circuit generating output signal at first or second output terminal according to level of input signal
03/07/1990EP0357034A2 Audio signal processing system performing balance control in both amplitude and phase of audio signal
02/1990
02/27/1990US4905291 Cyberoptic audio level control system
02/27/1990US4905284 Audio system for vehicular applications
02/14/1990EP0354517A2 Center mode control circuit
01/1990
01/31/1990EP0352627A2 Sound reproducer
12/1989
12/26/1989US4890065 Relative time delay correction system utilizing window of zero correction
12/19/1989US4888809 Method of and arrangement for adjusting the transfer characteristic to two listening position in a space
12/12/1989US4887045 Sum/differential signal processing circuit
10/1989
10/05/1989WO1989009465A1 Electro-acoustical system
10/04/1989EP0335468A1 Electro-acoustical system
09/1989
09/12/1989US4866774 Stero enhancement and directivity servo
08/1989
08/08/1989US4856065 Power fader for a loudspeaker system
07/1989
07/12/1989EP0323830A2 Surround-sound system
07/04/1989US4845775 Loudspeaker reproduction apparatus in vehicle
05/1989
05/16/1989US4831652 Stereo expansion circuit selection switch
03/1989
03/28/1989US4817149 Three-dimensional auditory display apparatus and method utilizing enhanced bionic emulation of human binaural sound localization
03/28/1989CA1251876A1 Method and apparatus for providing a visual indication of a relationship between two signals
03/22/1989EP0308009A1 Method of and arrangement for adjusting the transfer characteristic to two listening positions in a space
08/1988
08/30/1988US4768086 Color display apparatus for displaying a multi-color visual pattern derived from two audio signals
08/10/1988CN87207239U Floating-point peak-displaying level indicator
08/03/1988EP0276948A2 Sound field control device
07/1988
07/27/1988EP0276159A2 Three-dimensional auditory display apparatus and method utilising enhanced bionic emulation of human binaural sound localisation
07/12/1988US4757538 Stereo signal separation system
06/1988
06/09/1988DE3740358A1 Loudspeaker volume control circuit
05/1988
05/10/1988CA1236406A1 Fader arrangement in electrical reproducing apparatus and fader control for such an arrangement
04/1988
04/19/1988US4739513 Method and apparatus for measuring and correcting acoustic characteristic in sound field
04/05/1988US4736426 Graphic balancer
01/1988
01/13/1988EP0252452A2 Separation of L+R from L-R in BTSC system
12/1987
12/17/1987DE3620170A1 Circuit arrangement for a sound reproduction device
10/1987
10/28/1987CN86104723A Electroacoustic system with displaced acoustic source
09/1987
09/01/1987US4691358 Stereo image display device
08/1987
08/18/1987CA1225599A1 Signal decoding system
08/13/1987WO1987004799A1 Measuring apparatus
07/1987
07/21/1987US4682364 Fader circuit arrangement in electrical reproducing apparatus and fader control for such an arrangement
04/1987
04/15/1987EP0218370A1 Method and apparatus for providing a visual indication of a relationship between two signals
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