Audio processing arrangement with multiple sources

Details Audio processing arrangement with multiple sources Audio processing arrangement with multiple sources

1999-05-11

2008-11-18

Mei, Xu (Department: 2615)

Electrical audio signal processing systems and devices

Directive circuits for microphones

C381S091000, C381S122000

Reexamination Certificate

active

07454023

ABSTRACT:
In an audio processing arrangement (2) input signals from a plurality of input sources (4,6) are weighted by weighting factors x and y using weighting elements (10, 12). The weighted input signals are combined to a combined signal by an adder (18). The output signal of the adder (18) constitutes the output of the audio processing arrangement.In order to pronounce the signal with the strongest signal, the weighting coefficients (x,y) are controlled to maximize the output signal of the adder (18) under the constraint that the sum of the squares of the weighting coefficients is equal to a constant.

REFERENCES:
patent: 5793875 (1998-08-01), Lehr et al.
patent: 6317501 (2001-11-01), Matsuo
patent: 6618485 (2003-09-01), Matsuo
patent: 6774934 (2004-08-01), Belt et al.
By S. Affes and Y. Grenier “A Signal Subspace Tracking Algorithm for Microphone Array Processing of Speech” in IEEE Transactions on Speech and Audio Processing, vol. 5, No. R Sep. 1997, pp. 425-437.

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