Method and apparatus for echo cancellation

Details Method and apparatus for echo cancellation Method and apparatus for echo cancellation

2005-08-30

2005-08-30

Tran, Sinh (Department: 2644)

Telephonic communications

Echo cancellation or suppression

C379S406020, C379S406050, C379S406060, C379S406080, C379S406090, C379S406110

Reexamination Certificate

active

06937722

ABSTRACT:
An echo canceler for generating an echo replica and subtracting the echo replica from a local input signal to create a residual signal for outgoing transmission. An echo canceler has adaptive filters that have different computational accuracy generating the echo replica. An evaluator coupled to the adaptive filters groups coefficients into each of segments, and evaluating a computational accuracy information according to the coefficients for the segments. A computational accuracy controller in the evaluator assigns the local input signal to the adaptive filters, and adjusts the coefficients according to the computational accuracy information.

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