41
Benjelloun Touimi Abdellatif, Boisseau Cedric, Lamblin Claude, Bouteille Frank, Deleam David, Patard Roland: Methode et dispositif de traitement dune pluralite de flux binaires audio. France Telecom, August 9, 2002: FR2820573-A1 (40 worldwide citation)

The invention relates to an audio signal processing device that can receive numerous input audio streams and supply at least one output audio stream from said input audio streams. At least one of said input audio streams, called the first stream, may have missing data. Said device comprises means fo ...


42
Zoran Cvetkovic: Nonuniform oversampled filter banks for audio signal processing. AT&T, Henry Brendzel, February 7, 2006: US06996198 (38 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 ...


43
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 ...


44
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 ...


45
Robert L Brennan, Edward Chau, Hamid Sheikhzadeh Nadjar, Todd Schneider: Directional audio signal processing using an oversampled filterbank. DSPFactory, Daniel J Santos, April 15, 2008: US07359520 (36 worldwide citation)

A directional signal processing system for beamforming information signals. The system includes an oversampled filterbank, which has an analysis filterbank for transforming the information signals in time domain into channel signals in transform domain, a synthesis filterbank and a signal processor. ...


46
Michael H Kuhn, Herbert Piotrowski, Rudolf Geppert: Method of and arrangement for controlling the gain of an amplifier. U S Philips Corporation, Thomas A Briody, William J Streeter, Edward W Goodman, September 24, 1985: US04543537 (36 worldwide citation)

For processing a signal applied to an input of audio signal processing devices, for example a speech signal received via a microphone (2) in a speaker-identification or speech recognition system, the signal must have a specific level. For this purpose the signal is applied via an amplifier (4) with ...


47
Oh Eun Mi, Kim Sang Wook, Lee Sang Jo, Kim Mi Young: Apparatus and method for processing audio signal and computer readable recording medium storing computer program for the method. Samsung Electronics, September 8, 2004: EP1455504-A2 (35 worldwide citation)

An audio signal processing apparatus and method and a computer readable recording medium storing a computer program for the method are provided. The audio signal processing apparatus includes: an input unit that receives the audio signal; and a signal processing unit that processes the audio signal ...


48
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 ...


49
David E Blackmer: Detection and monitoring device. DBX, Schiller and Pandiscio, January 8, 1980: US04182930 (33 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 ...


50
Hisashi Kihara, Shinjiro Kato, Fumio Tamura, Shuichi Mori: Digital audio signal processing apparatus. Pioneer Electronic Corporation, Perman & Green, May 11, 1993: US05210806 (33 worldwide citation)

Disclosed herein is a digital audio signal processing apparatus of a type wherein a graphic equalizer including a plurality of filters connected in series to one another is subjected to arithmetic operation processing to be defined to thereby output the result of its processing as data therefrom. Wh ...