Recursive-like adaptive echo canceller

Details Recursive-like adaptive echo canceller Recursive-like adaptive echo canceller

H - Electricity

04

B

379/64, 340/72

H04B 3/20 (2006.01) H04M 1/74 (2006.01) H04M 3/18 (2006.01)

Patent

CA 1091833

RECURSIVE-LIKE ADAPTIVE ECHO CANCELLER Abstract of the Disclosure The present invention relates to an echo canceller of the type having a transversal filter for synthesizing, from an input signal on a receiving signal path, a replica to approximate an echo signal on a sending signal path for substraction from the echo signal. The canceller includes a subtracting unit for subtracting the replica from the echo signal so as to produce a residual echo. The transversal filter is responsive to the residual echo for changing the replica to reduce the residual echo. The canceller further comprises a first adaptive signal processor which is responsive to the residual echo signal for modifying the echo signal on the sending path before the subtraction, and a second adaptive signal processor coupled to receive the replica and responsive to the first adaptive processor to selectively alter the replica to make an altered replica suitable for subtraction directly from the echo signal. A subtractor unit is provided for combining the altered replica and the echo signal on the sending path to provide a clear sending signal essentially free of the echo signal.

346397

Affiliated with

Also associated with

Rating

Recursive-like adaptive echo canceller does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Recursive-like adaptive echo canceller, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recursive-like adaptive echo canceller will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-593171