Canceller trained echo suppressor

Details Canceller trained echo suppressor Canceller trained echo suppressor

1982-12-27

1986-12-09

Brown, Thomas W.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379345, H04B 320

Patent

active

046281568

ABSTRACT:
An improved echo suppressor is described in which a more sophisticated echo canceller can be employed to derive optimum training coefficients for application to the echo suppressor. The canceller can be used on a shared basis among a large group of echo suppressors to provide periodic updating and adaptive training coefficients to each suppressor individually. The echo canceller operates in a supervisory role and is shared over a group of adaptive echo suppressors. The canceller trains each adaptive echo suppressor during a set up period for newly initiated voice traffic. The canceller is also responsible for initializing the parameters of a multi-parameter echo suppressor where the parameters are generated as a result of the coding technique employed. Upon completion of the initial parameter determination, the canceller is released and the echo control responsibility is transferred to the suppressor. The canceller is then free to initialize another suppressor when new traffic enters the system. The multi-parameter adaptive echo suppressors utilize features associated with the speech coder. Any of a variety of a speech coders may be used and the individual features which result from their coding process can be analyzed by the echo canceller to generate control and training parameters for the echo suppressor.

REFERENCES:
patent: 3754105 (1973-08-01), Poschenrieder et al.
patent: 3787645 (1974-01-01), Ochiai et al.
patent: 3828147 (1974-08-01), Ochiai et al.
patent: 4005277 (1977-01-01), Araseki et al.
patent: 4029912 (1977-06-01), Geigel et al.
patent: 4051332 (1977-09-01), Izumi et al.
patent: 4117277 (1978-09-01), van den Elzen et al.
patent: 4131767 (1978-12-01), Weinstein
patent: 4225754 (1980-09-01), Bernard et al.
1976 International Conf. on Comm., Vo. 3, Jun. 14-16, 1976, Philadelphia, Pa., pp. 36-9-36-12.

Affiliated with

Also associated with

Rating

Canceller trained echo suppressor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Canceller trained echo suppressor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Canceller trained echo suppressor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1386266