Methods and apparatus for detecting voice information in telepho

Details Methods and apparatus for detecting voice information in telepho Methods and apparatus for detecting voice information in telepho

1990-12-11

1993-08-24

Dwyer, James L.

Telephonic communications

Audio message storage, retrieval, or synthesis

Multilingual system or operation

379 67, 379 80, 379351, 379 1, H04M 154, H04M 342

Patent

active

052395740

ABSTRACT:
Voice signal information in a telephone-type signal is detected by subjecting the signal to several tests such as a minimum energy test, an amplitude ratio test, and a sequencing test which ensures that the other tests have been satisfied for a sufficient length of time and/or sufficiently frequently over a predetermined time interval. A voice processing system such as a voice mail system may use the detection of voice as above to initiate the transmission of an announcement or message during an automatically placed telephone call.

REFERENCES:
patent: 4426730 (1984-01-01), Lajotte et al.
patent: 4485486 (1984-11-01), Webb et al.
patent: 4677663 (1987-06-01), Szlam

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