Residual echo suppression

Details Residual echo suppression Residual echo suppression

1997-02-07

1999-08-10

Le, N.

Telephonic communications

Echo cancellation or suppression

379410, 379411, 370286, 381 943, H04M 100, H04M 908, H04B 1500

Patent

active

059370602

ABSTRACT:
A residual echo suppression system suppresses the remaining echo signal not cancelled by an echo canceller. The residual echo suppression system replaces the remaining echo signal by reshaping the spectrum of the signal so that the spectrum shape matches the background noise spectrum. The resultant system is useful in hands-free telephones and especially in hands-free cellular telephones for use in automobiles.

REFERENCES:
patent: 5157653 (1992-10-01), Genter
patent: 5390250 (1995-02-01), Janse et al.
patent: 5633936 (1997-05-01), Oh

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