| Patents for H04S 5 - Pseudo-stereo systems, e.g. in which additional channel signals are derived from monophonic signals by means of phase shifting, time delay or reverberation (2,758) |
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| 11/09/1993 | US5261005 Sound field control device |
| 11/09/1993 | US5260920 Acoustic space reproduction method, sound recording device and sound recording medium |
| 10/19/1993 | US5255370 Data transfer apparatus and data transfer system |
| 10/05/1993 | US5251260 Audio surround system with stereo enhancement and directivity servos |
| 08/31/1993 | CA1321756C Sound field reproducing apparatus |
| 08/10/1993 | US5235646 Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby |
| 08/04/1993 | EP0554031A1 Head related transfer function pseudo-stereophony |
| 08/04/1993 | EP0553832A1 Sound field controller |
| 07/28/1993 | CN1074795A Echo-adding circuit |
| 07/22/1993 | WO1993014606A1 Loudspeaker system |
| 07/22/1993 | CA2117383A1 Loudspeaker system |
| 07/07/1993 | EP0549836A1 Multi-dimensional sound reproduction system |
| 06/22/1993 | US5222059 Surround-sound system with motion picture soundtrack timbre correction, surround sound channel timbre correction, defined loudspeaker directionality, and reduced comb-filter effects |
| 06/15/1993 | US5220608 Method and means for stereophonic sound reproduction |
| 06/01/1993 | US5216718 Method and apparatus for processing audio signals |
| 06/01/1993 | US5216596 Telepathology diagnostic network |
| 05/13/1993 | WO1993009644A1 Process for reducing data in the transmission and/or storage of digital signals from several dependent channels |
| 05/04/1993 | US5208860 Sound imaging method and apparatus |
| 04/07/1993 | EP0535276A1 Monaural to stereophonic sound translation process and apparatus |
| 04/06/1993 | US5201005 Sound field compensating apparatus |
| 03/31/1993 | EP0533757A1 Surround processor |
| 03/24/1993 | CN1070301A 环绕声处理器 Surround Processor |
| 03/23/1993 | US5197100 Audio circuit for a television receiver with central speaker producing only human voice sound |
| 03/09/1993 | US5193118 Vehicular sound reproducing |
| 02/23/1993 | US5189703 Timbre correction units for use in sound systems |
| 02/10/1993 | EP0526880A2 Audio surround system with stereo enhancement and directivity servos |
| 02/03/1993 | EP0526136A2 System for calibrating sound field |
| 01/05/1993 | US5177798 Sound reproducer for high definition television |
| 12/22/1992 | US5173944 Head related transfer function pseudo-stereophony |
| 12/15/1992 | US5172415 Surround processor |
| 12/01/1992 | CA1310919C Surround-sound system |
| 11/04/1992 | CA2067414A1 Psycho acoustic pseudo stereo foldback system |
| 10/21/1992 | EP0509195A2 Acoustic irradiation installation of an automobile |
| 10/21/1992 | CN1018790B Sound imaging method and apparatus |
| 10/06/1992 | CA1308485C Automated stereo synthesizer for audiovisual programs |
| 09/23/1992 | EP0504562A1 Sound reproduction system for sound reproduction with spatial sound effect |
| 09/08/1992 | US5146507 Audio reproduction characteristics control device |
| 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 | EP0499729A1 Sound imaging apparatus for a video game system |
| 08/11/1992 | US5138660 Sound imaging apparatus connected to a video game |
| 07/21/1992 | CA1305550C Stereo electroacoustical transducing |
| 07/07/1992 | US5128999 Sound field correcting apparatus |
| 06/11/1992 | WO1992009921A1 Improved method and apparatus for creating sounds in a virtual world |
| 06/09/1992 | US5121433 Apparatus and method for controlling the magnitude spectrum of acoustically combined signals |
| 06/02/1992 | US5119428 Electro-acoustic system |
| 06/02/1992 | US5119422 Optimal sonic separator and multi-channel forward imaging system |
| 06/02/1992 | CA1302298C Center mode control circuit for sound system |
| 06/02/1992 | CA1302297C Surround decoder |
| 05/27/1992 | EP0487181A2 Sound field compensating apparatus |
| 05/19/1992 | CA1301074C Video sound |
| 05/12/1992 | US5113447 Method and system for optimizing audio imaging in an automotive listening environment |
| 05/06/1992 | EP0483950A2 Sound field correcting apparatus |
| 04/21/1992 | CA1299111C Stereo synthesizer |
| 04/16/1992 | WO1992006568A1 Optimal sonic separator and multi-channel forward imaging system |
| 04/14/1992 | US5105462 Sound imaging method and apparatus |
| 03/18/1992 | EP0252102B1 A method and a circuit for decoding four-channel signals which are coded in a matrix and available in the form of a two-channel signal |
| 03/17/1992 | US5095798 Electronic gaming device with pseudo-stereophonic sound generating capabilities |
| 03/12/1992 | DE4125893A1 Audio reproduction system for motor vehicle - has multiple loudspeakersoperated to compensate for insufficiencies of acoustics insidevehicle |
| 03/10/1992 | US5095507 Method and apparatus for generating incoherent multiples of a monaural input signal for sound image placement |
| 01/21/1992 | US5083311 Sound field producing apparatus |
| 12/27/1991 | EP0462381A2 Method and apparatus for processing audio signal |
| 12/27/1991 | EP0462285A1 Acoustic reproducing device |
| 12/26/1991 | WO1991020166A1 Apparatus and method for controlling the magnitude spectrum of acoustically combined signals |
| 12/26/1991 | WO1991020165A1 Improved audio processing system and recordings made thereby |
| 12/16/1991 | WO1991020167A1 Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby |
| 12/16/1991 | CA2085480A1 Method and apparatus for creating de-correlated audio output signals and audio recordings made thereby |
| 12/09/1991 | WO1991019407A1 Surround processor |
| 12/09/1991 | CA2084512A1 Surround processor |
| 11/26/1991 | US5068897 Mobile acoustic reproducing apparatus |
| 11/12/1991 | US5065432 Sound effect system |
| 10/08/1991 | US5056149 Monaural to stereophonic sound translation process and apparatus |
| 10/01/1991 | US5052685 Sound processor for video game |
| 09/04/1991 | CN1013822B Variable matrix decoder |
| 09/03/1991 | US5046106 Varying loudspeaker spatial characteristics in a vehicle |
| 09/03/1991 | US5046098 Variable matrix decoder with three output channels |
| 09/03/1991 | US5046097 Sound imaging process |
| 08/27/1991 | US5043970 Sound system with source material and surround timbre response correction, specified front and surround loudspeaker directionality, and multi-loudspeaker surround |
| 08/13/1991 | US5040220 Control circuit for controlling reproduced tone characteristics |
| 07/24/1991 | EP0438317A2 Varying loudspeaker spatial characteristics in a vehicle |
| 07/19/1991 | CA2033887A1 Varying loudspeaker spatial characteristics in a vehicle |
| 07/17/1991 | CN1053163A Sound imaging system for video game |
| 07/11/1991 | WO1991010335A1 Acoustic reproducing device |
| 07/06/1991 | CA2033679A1 Method and system for optimizing audio imaging in an automotive listening environment |
| 07/02/1991 | US5027687 Basic audio signal |
| 06/25/1991 | US5027403 Video sound |
| 06/25/1991 | US5026051 Sound imaging apparatus for a video game system |
| 06/08/1991 | CA2031665A1 Sound imaging apparatus for a video game system |
| 05/14/1991 | CA1284112C Variable matrix decoder |
| 04/04/1991 | WO1991001544A3 Vehicular sound reproducing |
| 03/20/1991 | CN1050119A Sound imaging method and apparatus |
| 03/06/1991 | EP0415779A2 Multi-channel audio system |
| 03/01/1991 | CA2023838A1 Enhancing bass |
| 02/13/1991 | EP0412725A2 Sound reproduction apparatus |
| 02/07/1991 | WO1991001544A2 Vehicular sound reproducing |
| 02/06/1991 | EP0411786A1 Vehicular sound reproducing |
| 01/18/1991 | CA2021243A1 Vehicular sound reproducing |
| 01/08/1991 | US4984273 Enhancing bass |
| 12/27/1990 | EP0404117A2 Surround-sound system |
| 12/25/1990 | US4980915 Center mode control circuit |
| 11/06/1990 | US4968154 4-Channel surround sound generator |