Telephone network apparatus and method using echo delay and atte

Details Telephone network apparatus and method using echo delay and atte Telephone network apparatus and method using echo delay and atte

1995-03-17

1998-06-02

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

379 67, 379 88, 379410, 379411, G10L 506, G10L 900, H04M 164, H04M 100

Patent

active

057616388

ABSTRACT:
The present invention provides a telephone network apparatus for performing speech recognition services in a telephone system in substantially real time. The apparatus uses a telephone channel signal to determine the echo delay of a telephone channel and then uses this delay to configure an echo cancellation filter for use in performing speech recognition. Use of echo delay in configuring the filter allows the echo cancellation function to be done using much less computational time than would be needed without its use, thereby granting a speech recognition unit greater access to a resident microprocessor to perform its function in substantially real time.

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