Methods and systems for reducing acoustic echoes in...

Details Methods and systems for reducing acoustic echoes in... Methods and systems for reducing acoustic echoes in...

2006-04-20

2011-10-25

Faulk, Devona (Department: 2614)

Electrical audio signal processing systems and devices

Feedback suppression

C381S095000, C381S096000, C381S083000, C381S121000

Reexamination Certificate

active

08045730

ABSTRACT:
Various embodiments of the present invention are directed to methods and systems that reduce acoustic echoes in audio signals in accordance with changing conditions at first and second locations that are linked together in a communication system. In one embodiment of the present invention, a first digital signal encoding sounds produced at the first location is output from the first location, and a second digital signal encoding an acoustic echo and sounds produced at the second location is output from the second location. The method computes a control state that depends on the signals transmitted between the first and the second locations and computes an approximate acoustic echo based on the control state.

REFERENCES:
patent: 2002/0159603 (2002-10-01), Hirai et al.

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