Echo cancellation and noise reduction adaptation during...

Details Echo cancellation and noise reduction adaptation during... Echo cancellation and noise reduction adaptation during...

2006-07-21

2011-11-08

Tsang, Fan (Department: 2614)

Telephonic communications

Echo cancellation or suppression

Using digital signal processing

C379S406050, C379S406110, C379S406120

Reexamination Certificate

active

08054966

ABSTRACT:
A communication device is provided that includes a speaker for outputting a ringing signal, a microphone for receiving the ringing signal, and logic configured to analyze the spectral content of the received ringing signal and adjust noise reduction parameters and echo cancellation parameters based on the analyzed spectral content of the received ringing signal.

REFERENCES:
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patent: 5400399 (1995-03-01), Umemoto et al.
patent: 2004/0264686 (2004-12-01), Enzner
patent: 64-50655 (1989-02-01), None
patent: WO 97/45995 (1997-12-01), None
International Search Report mailed on Apr. 24, 2007 for corresponding PCT Application No. PCT/IB2007/050178.
International Preliminary Report on Patentability dated Jul. 22, 2008 issued in corresponding international application No. PCT/IB2007/050178, 6 pages.

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