Echo canceller and communication apparatus employing the same

Details Echo canceller and communication apparatus employing the same Echo canceller and communication apparatus employing the same

1990-03-13

1992-07-14

Dwyer, James L.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379390, 379406, 379 90, H04M 1108

Patent

active

051310325

ABSTRACT:
An echo canceller and a communication apparatus employing the same, are capable of stably reproducing sounds other than a received sound during a speech through a telephone and the received sound is heard by the other party to the speech. The echo canceller includes first and second input terminals and first and second output terminals. An echo path between the first output terminal and the second input signal terminal is adaptively estimated. A signal component inputted through the echo path is cancelled from a signal inputted to the second input terminal. The canceller further includes a signal mixing means for mixing a plurality of signals inputted thereto.

REFERENCES:
patent: 4338492 (1982-07-01), Snopko
patent: 4356509 (1982-10-01), Skerlos et al.
patent: 4414432 (1983-11-01), Skerlos et al.
patent: 4456925 (1984-06-01), Skerlos et al.
patent: 4629829 (1986-12-01), Puhl et al.
The Bell System Technical Journal, Mar. 1967, vol. XLVI, No. 3, pp. 497-511.

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