Method for detecting voice presence on a communication line

Details Method for detecting voice presence on a communication line Method for detecting voice presence on a communication line

H - Electricity

04

J

H04J 3/17 (2006.01) G10L 11/02 (2006.01) G10L 9/18 (1995.01)

Patent

CA 2076606

A method and apparatus allows to accurately detect voice presence on a digitized communication line even in the presence of tone signals. The method includes analyzing digitized communication input signal by current blocks of 20ms (step 20), to define the stationary or non stationary state of any current block (step 21). Then an analysis on the states of the M last 20ms blocks (step 22) allows to give the final decision on voice presence or not.

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