Multi-channel echo cancelling method and a device thereof

Details Multi-channel echo cancelling method and a device thereof Multi-channel echo cancelling method and a device thereof

1994-05-31

1996-04-30

Kuntz, Curtis

Electrical audio signal processing systems and devices

Dereverberators

381 94, 379410, 379411, 379202, 379206, H04B 320

Patent

active

055132650

ABSTRACT:
The present invention relates to a multi-channel echo cancelling art enabling proper operation even if using a microphone not generating propagation delay difference between channels. The present invention comprises: a step of calculating a power of reception signal in each reception channel and selecting a reception channel of a reception signal having the biggest power; a step of generating an echo replica corresponding to an echo in each mixed signal generated by propagation of reception signals of the reception channels based on a reception signal of the reception channel selected in the previous step; and a step of cancelling the echoes from mixed signals in which the echoes are mixed by subtracting the echo replicas from the mixed signals.

REFERENCES:
patent: 5305309 (1994-04-01), Chujo
patent: 5323459 (1994-06-01), Hirano
patent: 5371789 (1994-12-01), Hirano

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