Acoustic echo cancellation in an integrated audio and telecommun

Details Acoustic echo cancellation in an integrated audio and telecommun Acoustic echo cancellation in an integrated audio and telecommun

1996-03-29

1998-01-06

Zele, Krista M.

Telephonic communications

Subscriber line or transmission line interface

Network interface device

379406, 379411, 379388, 381 71, 381 94, H04M 900, G10K 1116

Patent

active

057063443

ABSTRACT:
Robust acoustic echo cancellation in a single-channel integrated audio and intercom system is provided by adapting echo cancellation filters in accordance with an optimized autocorrelation matrix. This is carried out in a modified FIR LMS filter in which the adaptation regressor signal is formed by a combination of one or more of the received voice signal, the received audio signal, and/or a random noise signal. In a SISO system, it is usually desirable to shelter the regressor signal from tonal components such as voice signals. In a multiple-channel system, it is usually desirable to shelter regressor signals for a particular channel from acoustic components that are likely to be correlated to acoustic components in other parts of the system and are likely to affect that particular channel. In multi-channel applications, it is therefore usually desirable to shelter regressor signals from audio signals.

REFERENCES:
patent: 4677676 (1987-06-01), Eriksson
patent: 5033082 (1991-07-01), Eriksson et al.
patent: 5131047 (1992-07-01), Hashimoto et al.
patent: 5216721 (1993-06-01), Melton
patent: 5216722 (1993-06-01), Popovich
patent: 5222084 (1993-06-01), Takahashi
patent: 5226088 (1993-07-01), Winterer et al.
patent: 5245664 (1993-09-01), Kinoshite et al.
patent: 5305307 (1994-04-01), Chu
patent: 5313945 (1994-05-01), Friedlander
patent: 5323459 (1994-06-01), Hirano
patent: 5325437 (1994-06-01), Doi et al.
patent: 5327496 (1994-07-01), Russell et al.
patent: 5337365 (1994-08-01), Hamabe et al.
patent: 5371802 (1994-12-01), McDonald et al.
patent: 5381485 (1995-01-01), Elliott
patent: 5600718 (1997-02-01), Dent et al.
patent: 5602928 (1997-02-01), Eriksson et al.
AT&T Digital Processing of Speech Signals, Bell Laboratories, Inc., 1978.

Affiliated with

Also associated with

Rating

Acoustic echo cancellation in an integrated audio and telecommun does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Acoustic echo cancellation in an integrated audio and telecommun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Acoustic echo cancellation in an integrated audio and telecommun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2336176