31
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 (39 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 ...


32
Timothy J Van Hook, Howard H Cheng, Anthony P DeLaurier, Carroll P Gossett, Robert J Moore, Stephen J Shepard, Harold S Anderson, John Princen, Jeffrey C Doughty, Nathan F Pooley, Byron Sheppard, Genyo Takeda, Shuhei Kato: High performance low cost video game system with coprocessor providing high speed efficient 3D graphics and digital audio signal processing. Nintendo, Silicon Graphics, Nixon & Vanderhye P C, April 29, 2003: US06556197 (38 worldwide citation)

A low cost high performance three dimensional (3D) graphics system is disclosed that can model a world in three dimensions and project the model onto a two dimensional viewing plane selected based on a changeable viewpoint. The viewpoint can be changed on an interactive, real time basis by operating ...


33
Robert H Langford: Audio signal processing system. Beveridge De Grandi Kline & Lunsford, January 15, 1980: US04184047 (37 worldwide citation)

An audio signal processing system for enhancing audio signals such as music by providing reverberation, generation of stereophonic or quadraphonic effects, chorusing, flanging, pitch change, vibrato and various combinations of these effects. An audio signal is passed through a compressor, to increas ...


34
Steven S O Connell: Software sound synthesis system. Invision Interactive, Philip M Shaw Jr, Limbach & Limbach L, January 21, 1997: US05596159 (36 worldwide citation)

An audio signal processing system including an input circuit for inputting musical instrument digital interface (MIDI) commands in real time over a plurality of channels, a computer including a central processing unit (CPU) supplied with the MIDI commands for simultaneously synthesizing one or more ...


35
Tanaka Yoshiaki, Fuchigami Norihiko, Ueno Shoji: Recording medium and audio-signal processing apparatus. Fujitsu, January 20, 1999: EP0892404-A2 (36 worldwide citation)

A digital signal recording disc has a first area and a second area. The second area differs from the first area. The first area stores a first-channel digital audio signal and a second-channel digital audio signal. The first-channel digital audio signal results from quantizing a first-channel analog ...


36
Zoran Cvetkovic: Nonuniform oversampled filter banks for audio signal processing. AT&T, Henry Brendzel, February 7, 2006: US06996198 (34 worldwide citation)

A non-uniform filter bank is created by joining sections of oversampled uniform filter bands that are based on complex exponential modulation (as opposed to cosine modulation). Each filter bank handles a given, non-overlapping frequency band. The bands are not of uniform bandwidth, and the filters o ...


37
Mitsuyoshi Fukuda: Method and apparatus for processing audio signals. Sanyo Electric, Armstrong Westerman Hattori McLeland & Naughton, June 1, 1993: US05216718 (33 worldwide citation)

A method and an apparatus for processing audio signals with a directional emphasis by providing other channels besides the left and the right channels. An audio signal processing apparatus is divided into two blocks: a first block for processing digital signals of the left channel and the right chan ...


38
Abhijit Kulkarni: Audio signal processing. Bose Corporation, Fish & Richardson P C, February 10, 2009: US07490044 (31 worldwide citation)

An audio system for processing two channels of audio input to provide more than two output channels. The input may be conventional stereo material or compressed audio signal data. The audio processing includes separating the input signals into frequency bands and processing the frequency bands accor ...


39
David E Blackmer: Detection and monitoring device. DBX, Schiller and Pandiscio, January 8, 1980: US04182930 (31 worldwide citation)

An improved audio signal processing system synthesizes from an audio signal, an enhanced audio signal by sensing signal energy of the audio signal within a preselected frequency portion of the audio signal, dividing the sensed signal energy into a plurality of discrete bands according to the frequen ...


40
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 (30 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 ...



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