21
Raimund Martin, Werner Hohn, Reinhard Kern: Programmable hearing aid. Siemens Augiologische Technik, Hill Steadman & Simpson, January 20, 1998: US05710820 (54 worldwide citation)

A hearing aid that has an analog part with a Class D final amplifier stage for audio signal processing, a digital part with an interface, a memory stage as well as supply stage for generating the voltage and control signals. The hearing aid has a utilized integrated circuit which also includes a pre ...


22
Michael A Gerzon: Audio signal processor providing simulated source distance control. Trifield Productions, Baker & Daniels, September 10, 1996: US05555306 (53 worldwide citation)

An audio signal processing system produces an output 24 having an illusory distance effect for a sound source signal S by feeding it via a direct signal path 25 and an indirect signal path 22, 23 passing through early reflection simulation apparatus 1 which feed an output mixing mechanism 9. A contr ...


23
Gregory Kramer: Digital signal processor for providing timbral change in arbitrary audio and dynamically controlled stored digital audio signals. Yield Securities, Brooks Haidt Haffner & Delahunty, February 5, 1991: US04991218 (52 worldwide citation)

A digital audio signal processing technique in which the harmonic content of the output signal varies with the amplitude of an input signal. The preferred embodiment includes an analog to digital converter with sample and hold, a digital signal memory with playback control apparatus, timing circuits ...


24
Tae hwa Jeong: Score evaluation display device for an electronic song accompaniment apparatus. Samsung Electronics, Sughrue Mion Zinn Macpeak & Seas, July 18, 1995: US05434949 (51 worldwide citation)

A score evaluation display device for an electronic song accompaniment apparatus has an audio signal processing unit to evaluate a user's singing. A sampling processor samples the difference between an input song signal from a microphone and reference song signal, a volume deference detector detects ...


25
Duane H Cooper, Jerald L Bauck: Head diffraction compensated stereo system with optimal equalization. Welsh & Katz, March 20, 1990: US04910779 (50 worldwide citation)

A stereo audio processing system for a stereo audio signal processing reproduction that provides improved source imaging and simulation of desired listening environment accoustics while retaining relative independence of listener movement. The system first utilizes a synthetic or artificial head mic ...


26
Makio Yamaki, Hiroyuki Ishihara, Norimichi Katsumura, Toshiyuki Naoe, Yukio Matsumoto, Kazuhiro Hayashi, Kazuo Watanabe: Audio signal processing system having independent and distinct data buses for concurrently transferring audio signal data to provide acoustic control. Pioneer Electronic Corporation, Foley & Lardner, June 8, 1993: US05218710 (50 worldwide citation)

An audio signal data processing system comprises input device for sequentially supplying an audio signal data, data memory control device for writing the audio signal data into a data memory and reading-out the data from the data memory, delay memory control device for sequentially reading-out the a ...


27
Kiyofumi Inanaga, Hiroyuki Sogawa, Yasuhiro Iida, Yabe Susumu: Audio signal reproducing apparatus. Sony Corporation, Hill Steadman & Simpson, February 27, 1996: US05495534 (49 worldwide citation)

In the audio signal reproducing apparatus, information on the transfer characteristics representative of the transfer characteristics from virtual sound sources to both ears of a listener in at least a first quadrant of the rotational angular position of the head M of the listener is stored in stori ...


28
Seiji Higurashi: Magnetic recording and/or reproducing apparatus having means for preventing audio-to-video crosstalk and noise generation. Victor Company of Japan, Michael N Meller, November 5, 1991: US05063452 (47 worldwide citation)

A magnetic recording apparatus comprising an audio signal processing circuit for converting an input analog audio signal into a digital audio signal; a modulating circuit for subjecting the digital audio signal to a modulation selected from a multi-phase differential phase shift keying modulation (D ...


29
J Richard Aylward, Erik E Anderson: Audio signal processing. May 8, 2012: US08175292 (46 worldwide citation)

A method for processing and transducing audio signals. An audio system has a first audio signal and a second audio signal that have amplitudes. A method for processing the audio signals includes dividing the first audio signal into a first spectral band signal and a second spectral band signal; scal ...


30
Peter M Kuhn: Video/audio signal processing method and video-audio signal processing apparatus. Sony Corporation, Frommer Lawrence & Haug, William S Frommer, Paul A Levy, April 8, 2008: US07356082 (46 worldwide citation)

A metadata extraction unit has a feature point selection and motion estimation unit 62 for extracting at least one feature point representing characteristics of the video/audio signals in a compressed domain of the video/audio signals. Thus, reduction of time or cost for processing can be realized a ...



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