Training method for an echo canceller for use in a voice confere

Details Training method for an echo canceller for use in a voice confere Training method for an echo canceller for use in a voice confere

1990-06-12

1991-09-17

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379406, 379410, 379411, H04M 908

Patent

active

050501607

ABSTRACT:
A method for training an echo canceller of a voice conference system, to cancel an echo by subtracting an estimated echo signal from an actual echo signal, includes the steps of: generating, at a time of a first training session, an initial echo signal and an initial training signal through feeding of a training signal to a loudspeaker and to the echo canceller; obtaining a response characteristic of the echo canceller to the echo signals; storing the initial echo signal and the initial training signal; and training the echo canceller, during subsequent training sessions, by using the stored initial echo signal and the stored training signal.

REFERENCES:
patent: 4621173 (1986-11-01), Guidoux
patent: 4827473 (1989-05-01), Ferrieu
patent: 4852161 (1989-07-01), Hagiwara
patent: 4891801 (1990-01-01), Marcos et al.
patent: 4896318 (1990-01-01), Kokubo et al.

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