Patents
Sitemap › H04 - Electric communication technique › H04S - Stereophonic systems › H04S 1 - Two-channel systems
Patents for H04S 1 - Two-channel systems (4,182)
01/1999
01/07/1999EP0889671A2 Apparatus for localization of sound image
12/1998
12/30/1998EP0698334B1 Stereophonic reproduction method and apparatus
12/29/1998US5854843 Audio system apparatus
12/23/1998WO1998058522A2 Sound reproduction system
12/17/1998WO1998042161A3 Telephonic transmission of three-dimensional sound
12/16/1998EP0688018B1 Digital speech sound reproduction apparatus and digital speech sound edition apparatus
12/15/1998US5850454 Method and apparatus for spatially enhancing stereo and monophonic signals
12/15/1998US5850453 Acoustic correction apparatus
12/09/1998EP0882381A1 An arrangement, a system, a circuit and a method for enhancing a stereo image
12/03/1998WO1998054927A1 Method and system for enhancing the audio image created by an audio signal
12/03/1998WO1998054926A1 Loudspeaker array for enlarged sweet spot
12/03/1998WO1998042162A3 Multidirectional audio decoding
12/02/1998EP0881857A2 Sound field correction circuit
12/02/1998EP0880871A1 Sound recording and reproduction systems
12/02/1998EP0783794B1 Method for Amplitude Demodulation
12/01/1998US5844816 Angle detection apparatus and audio reproduction apparatus using it
12/01/1998CA2058984C Polyphonic coding
11/1998
11/25/1998EP0879502A1 A method for implementing a sound reproduction system for a large space, and a sound reproduction system
11/25/1998CN1200009A System for processing audio surround signal
11/24/1998US5841879 Virtually positioned head mounted surround sound system
11/18/1998EP0878798A2 Audio signal encoding/decoding method and apparatus
11/18/1998CN1199318A System for processing audio surround signal
11/18/1998CN1199202A Encoding method and apparatus and recording medium
11/17/1998US5838800 Apparatus for enhancing stereo effect with central sound image maintenance circuit
11/12/1998WO1998051126A1 Method and apparatus for frequency-domain downmixing with block-switch forcing for audio decoding functions
11/12/1998WO1998033357A3 Method and apparatus for electronically embedding directional cues in two channels of sound for interactive applications
11/12/1998DE19800921A1 Data interpolation filter in form of wave filter
11/11/1998CN1198650A Stereophonic separation degree booster
11/10/1998US5835895 Audio signal processing system
10/1998
10/29/1998WO1998048406A1 Method for the optimal transmission of communication having any physical characteristics, method for optimal sound reproduction and system for realising the same, and method for the active, three-dimensional and optimal level reduction of signals having any physical characteristics
10/29/1998DE19716902A1 Sound generation method for music space or concert hall
10/27/1998US5828763 For reproducing an audio signal
10/27/1998US5827990 Karaoke apparatus applying effect sound to background video
10/22/1998WO1998047276A1 Method for cancelling multichannel acoustic echo and multichannel acoustic echo canceller
10/21/1998EP0873041A1 Digital sound processor
10/21/1998EP0872154A1 An acoustical audio system for producing three dimensional sound image
10/21/1998CN1196863A Acoustic correction apparatus
10/15/1998WO1998046045A1 Encoding method and device, decoding method and device, and recording medium
10/14/1998EP0870369A1 Enhanced concert audio process utilizing a synchronized headgear system
10/13/1998US5822440 Enhanced concert audio process utilizing a synchronized headgear system
10/13/1998US5822437 Signal modification circuit
09/1998
09/24/1998WO1998042162A2 Multidirectional audio decoding
09/24/1998WO1998042161A2 Telephonic transmission of three-dimensional sound
09/23/1998EP0737410B1 Apparatus for audio signal stereophonic adjustment
09/22/1998US5812685 Non-directional speaker system with point sound source
09/22/1998US5812677 Acoustic signal processing method and apparatus
09/22/1998US5812676 Near-field reproduction of binaurally encoded signals
09/22/1998US5812675 Sound reproducing array processor system
09/22/1998US5812672 Method for reducing data in the transmission and/or storage of digital signals of several dependent channels
09/22/1998US5811707 Effect adding system
09/22/1998CA2100154C Switched signal processing circuit
09/16/1998EP0865227A1 Sound field controller
09/16/1998EP0865226A2 A system for improving a spatial effect of stereo sound or encoded sound
09/16/1998EP0865225A2 Terminal station for a transmission system
09/16/1998EP0865025A1 Apparatus having loudspeakers concurrently producing both music and reflected sound
09/15/1998US5809153 Loudspeaker system
09/15/1998US5809149 Apparatus for creating 3D audio imaging over headphones using binaural synthesis
09/15/1998US5808923 Denormalization device and method for multichannel audio decoder
09/03/1998WO1998038835A1 Method and corresponding system for influencing the stereo channel separation of an audiosignal
09/01/1998US5802194 Stereo loudspeaker system with tweeters mounted on rotatable enlongated arms
09/01/1998US5802182 Audio process distortion
09/01/1998US5802180 Method and apparatus for efficient presentation of high-quality three-dimensional audio including ambient effects
08/1998
08/27/1998DE19707673A1 Verfahren zur Beeinflussung der Stereo-Kanaltrennung eines Audiosignals und Anordnung dazu Method for influencing the stereo channel separation of an audio signal and arrangement to
08/25/1998US5799094 Surround signal processing apparatus and video and audio signal reproducing apparatus
08/25/1998US5798922 Method for reproducing from an input signal sound
08/20/1998WO1998036615A1 A circuit arrangement for creating phantom sources in a stereo signal using shifting circuitry
08/20/1998WO1998036614A1 Creating an expanded stereo image using phase shifting circuitry
08/19/1998CN1190861A Two-accustic channel three-dimension stereo processor
08/18/1998US5796845 Sound field and sound image control apparatus and method
07/1998
07/30/1998WO1998033357A2 Method and apparatus for electronically embedding directional cues in two channels of sound for interactive applications
07/29/1998EP0855311A2 Sound system for a motor vehicle
07/23/1998WO1998032230A1 Data compression/expansion on a plurality of digital information signals
07/21/1998US5784467 Method and apparatus for reproducing three-dimensional virtual space sound
07/07/1998US5778082 Method and apparatus for localization of an acoustic source
07/02/1998DE19647399C1 Gehörangepaßte Qualitätsbeurteilung von Audiotestsignalen Hearing Adapted quality assessment of audio test signals
06/1998
06/30/1998US5774567 Audio codec with digital level adjustment and flexible channel assignment
06/30/1998US5774558 For visually displaying the volume of acoustic signals
06/30/1998US5774556 Stereo enhancement system including sound localization filters
06/23/1998US5771294 Acoustic image localization apparatus for distributing tone color groups throughout sound field
06/23/1998US5771041 System for producing directional sound in computer based virtual environment
06/23/1998CA2049295C Acoustic signal reproducing apparatus
06/16/1998US5768393 Three-dimensional sound system
06/16/1998US5767739 Digital demodulator for quadrature amplitude and phase modulated signals
06/10/1998EP0847225A2 Electroacoustical transducing
06/10/1998EP0846405A1 Process for reducing redundancy during the coding of multichannel signals and device for decoding redundancy-reduced multichannel signals
06/09/1998US5764777 Four dimensional acoustical audio system
06/09/1998US5764775 Audio processing unit for mixing L channel and R channel of CD/CD-1 audio signal
06/04/1998WO1998024032A1 System and method for scheduling and processing image and sound data
06/02/1998US5761434 Digital audio system including a software controlled phase lock loop for synchronizing audio sources to a common clock source
06/02/1998US5761314 Audio reproducing apparatus and headphone
06/02/1998US5761313 Circuit for improving the stereo image separation of a stereo signal
06/02/1998US5761295 Telephone instrument and method for altering audible characteristics
05/1998
05/28/1998WO1998023130A1 Hearing-adapted quality assessment of audio signals
05/28/1998DE19720217A1 Automatic equalising arrangement for multi-channel audio system
05/26/1998US5757939 Method for demonstrating sound quality differences between audio samples
05/26/1998US5757931 Signal processing apparatus and acoustic reproducing apparatus
05/22/1998WO1998021915A1 An arrangement, a system, a circuit and a method for enhancing a stereo image
05/20/1998EP0843409A1 Power amplifier apparatus
05/19/1998US5754660 Sound generator synchronized with image display
05/14/1998WO1998020707A1 Stereo sound expander
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