Electricity echo cancellation device and method

Details Electricity echo cancellation device and method Electricity echo cancellation device and method

2008-06-17

2011-10-18

Jamal, Alexander (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Combined diverse function

Reexamination Certificate

active

08041027

ABSTRACT:
An electricity echo cancellation device applied at a terminal includes: an input buffer memory module, a network echo delay computation module and an adaptive filtering module. The adaptive filtering module includes an adaptive filter, a subtracter and a dual-ended voice detection module. An electricity echo cancellation method includes: calculating a network echo delay according to relevant information of an RTCP packet transmitted from the network; and dynamically adjusting a terminal input signal to be adaptively filtered according to the network echo delay. The present invention ensures the electricity echo cancellation effect at the final user end on the whole, and improves the effectiveness of electricity echo cancellation. Meanwhile method of the present invention can be realized with software, thus avoiding influences of hardware memory restricts on the echo cancellation effect. In addition, the present invention only needs a single-point deployment, and thus the cost is saved.

REFERENCES:
patent: 6324170 (2001-11-01), McClennon et al.
patent: 6590975 (2003-07-01), Ariyama
patent: 6724736 (2004-04-01), Azriel
patent: 6792106 (2004-09-01), Liu
patent: 7304962 (2007-12-01), Kirla et al.
patent: 2002/0064139 (2002-05-01), Bist et al.
patent: 2002/0114445 (2002-08-01), Benesty et al.
patent: 1691716 (2005-11-01), None
patent: 0 986 190 (2000-03-01), None
patent: 01/45291 (2001-06-01), None
Melvin et al., “An Integrated NTP-RTCP Solution to Audio Skew Detection and Compensation for VOIP Applications,”Multimedia and Expo(IEEE), 2, 537-540 (Jul. 2003).
European Patent Office, Communication under Rule 71(3) EPC, Notice to Grant in European Patent Application 06753115.2 (Jun. 30, 2010).

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