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

1992-08-10

1993-10-19

Fleming, Michael R.

Telephonic communications

Special services

Anonymous party

379351, 379372, 364517, G10L 500

Patent

active

052553400

ABSTRACT:
Method and apparatus allows accurate detection of voice presence on a digitized communication line even in the presence of tone signals. The method includes analyzing digitized communication input signals by current blocks of 20ms, to define the stationary or non stationary state of any current block. Then an analysis on the states of the M last 20ms blocks allows the final decision on voice presence.

REFERENCES:
patent: 4028496 (1977-06-01), LaMarche et al.
patent: 4672669 (1987-06-01), DesBlache
patent: 4742537 (1988-05-01), Jesurum
patent: 4979214 (1990-12-01), Hamilton
patent: 4982341 (1991-01-01), Laurent
patent: 5023906 (1991-06-01), Novas

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