Echo detection and monitoring

Details Echo detection and monitoring Echo detection and monitoring

2005-08-30

2005-08-30

Harold, Jefferey F. (Department: 2644)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406080, C379S406010

Reexamination Certificate

active

06937723

ABSTRACT:
Echo detection and monitoring systems and methods are provided. According to the invention, the outgoing and incoming voice bearer channels of a voice communication are monitored. The outgoing and incoming signals are time aligned, and measures are then taken to determine whether echo is present in the signal. In accordance with an embodiment of the present invention, the outgoing signal is fed through an adaptive filter.

REFERENCES:
patent: 5909384 (1999-06-01), Tal et al.
patent: 5999901 (1999-12-01), Knittle et al.
patent: 6256384 (2001-07-01), Trump
patent: 6654463 (2003-11-01), Leonidov et al.
patent: 6687372 (2004-02-01), Trump et al.
patent: 6771701 (2004-08-01), Klindworth et al.
U.S. Appl. No. 10/152,716, filed May 22, 2002, Boland.
U.S. Appl. No. 10/153,106, filed May 22, 2002, Boland.
T. Yensen et al., “Echo Target Determination Using Acoustic Round Trip Delay for Voice Over IP Conferences”, IEEE 0-7803-5471-0/99, pp. IV-348-IV351, 1999.
ITU-T P-Series Recommendation P.562 “Series P: Telephone Transmission Quality, Telephone Installations, Local Line Networks,” May 2000.
ITU-T Recommendation P.561 “Telephone Transmission Quality Objective Measuring Apparatus,” Feb. 1996.
ITU-T Recommendation COM 12-10-E, Study Group 12—Contribution 10, Nov. 2000.
ITU-T P-Series Recommendation P.862 “Series P: Telephone Transmission Quality, Telephone Installations, Local Line Networks,” Feb. 2001.
Rix, et al., “PESQ—The New ITU Standard for End-to-End Speech Quality Assessment”,AES 109thConvention, Sep. 22-25, 2000.
Rix, et al., “The Perceptual Analysis Measurement System for Robust End-to-End Speech Quality Assessment,”IEEE, 2000.

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