System and method for updating filter coefficients and echo...

Details System and method for updating filter coefficients and echo... System and method for updating filter coefficients and echo...

2006-04-25

2006-04-25

Tran, Sinh (Department: 2646)

Telephonic communications

Echo cancellation or suppression

C379S406020, C379S406050, C379S406060, C379S406080, C379S406090

Reexamination Certificate

active

07035397

ABSTRACT:
A system for updating filter coefficients for use with an echo canceller, a related method for updating filter coefficients and an echo canceller including the system or the method. In one embodiment, the echo canceller has a nonadaptive filter and an adaptive filter, the nonadaptive filter having nonadaptive filter coefficients and configured to develop a nonadaptive error signal as a function of the nonadaptive filter coefficients, and the adaptive filter having adaptive filter coefficients and configured to develop an adaptive error signal as a function of the adaptive filter coefficients. The system includes a monitoring subsystem configured to monitor a quality of the nonadaptive and adaptive error signals and a selection subsystem configured to select one of the nonadaptive and adaptive filter coefficients for use by the nonadaptive filter based on the quality of the nonadaptive and adaptive error signals.

REFERENCES:
patent: 4591669 (1986-05-01), Duttweiler et al.
patent: 4922530 (1990-05-01), Kenney et al.
patent: 5610909 (1997-03-01), Shaw
patent: 5664011 (1997-09-01), Chochiere et al.
patent: 6337907 (2002-01-01), Laberteaux et al.
patent: 6614907 (2003-09-01), Laberteaux et al.
patent: 0422796 (1991-04-01), None
patent: 9-130306 (1997-05-01), None
“Comparison of Different Adaptive Algorithms for Stereophonic Acoustic Echo Cancellation” by Peter Eneroth, Jacob Benesty, Thomas Gansler, and Steven Gay; Proc. EUSIPCO, 2000, 4 pg.
“An Inplementation of a Stereophonic Acoustic Echo canceler on a General Purpose DSP” by Peter Eneroth, Steven Gay, Tomas Gansler and Jacob Benesty; Proc. ICSPAT; 1999; 5 pg.
“Echo Canceler with Two Echo Path Models” by Kazuo Ochiai, Takashi Araseki and Takashi Ogihara; IEEE Transactions on Communications; Jun. 1977; pp. 589-595.

Affiliated with

Also associated with

Rating

System and method for updating filter coefficients and echo... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for updating filter coefficients and echo..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for updating filter coefficients and echo... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3571388