Method for vectorial noise-reduction in speech, and implementati

Details Method for vectorial noise-reduction in speech, and implementati Method for vectorial noise-reduction in speech, and implementati

1993-12-28

1996-03-19

Rogers, Scott A.

Electrical audio signal processing systems and devices

Directive circuits for microphones

H04R 300

Patent

active

055009034

ABSTRACT:
A sound pick-up operation is carried out by means of at least four microphones positioned in a plane before the speaker, linear combinations are formed by additions and subtractions of the signals from these microphones and certain of these combinations are used as noise-only sources to process them by an adaptive vector filter to produce an estimation of the noise that is subtracted from the noisy signal.

REFERENCES:
patent: 4363112 (1982-12-01), Widrow
patent: 4589137 (1986-05-01), Miller
patent: 5058081 (1991-10-01), Gulli
Joseph Lardies, et al., Proceedings of Eusipco--88 Fourth European Signal Processing Conference, vol. 1, 5, Sep. 1988, pp. 299-302, "Localization of Radiating Sources by an Array of Sensors."
Harvey F. Silverman, et al., Computer Speech and Language, vol. 6, No. 2, Apr. 1992, pp. 129-152, "A Two-Stage Algorithm for Determining Talker Location from Linear Microphone Array Data."
Lloyd J Griffiths, et al., IEEE Transactions On Antennas and Propagation, vol. AP-30, No. 1, Jan. 1982, pp. 27-34, "An Alternative Approach to Linearly Constrained Adaptive Beamforming."
Dirk Van Compernolle, Speech Communication, vol. 9, No. 5/6, Dec. 1990, pp. 433-442, "Speech Recognition in Noisy Environments with the Aid of Microphone Arrays."
Ingvar Claesson, et al., IEEE Transaction on Vehicular Technology, vol. 40, Feb. 1991, pp. 194-202, "A Multi-DSP Implementation of a Broad-Band Adaptive Beamformer for use in a Hands-Free Mobile Radio Telephone."

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