Voice activity detection process and means for implementing said

Details Voice activity detection process and means for implementing said Voice activity detection process and means for implementing said

1984-05-31

1987-06-09

Kemeny, F. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

046726691

ABSTRACT:
Speech signal presence is detected in a VAD (Voice Activity Detector) in two steps: (1) Signal energy above a threshold decides presence, below threshold decides ambiguity; (2) ambiguity is resolved by testing the rate of change of spectral parameters.

REFERENCES:
patent: 4351983 (1982-09-01), Crouse et al.
Comsat Technical Review, vol. 6, No. 1, Printemps 1976, pp. 127-158, Communications Satellite Corporation, Washington, D.C., S. J. Campanella: "Digital Speech Interpolation", p. 151, 1. 4, p. 153, 1. 23.
Comsat Technical Review, vol. 6, No. 1, Printemps 1976, pp. 159-178, Communications Satellite Corporation, Washington, D.C., J. A. Jankowski, Jr., "A New Digital Voice-Activated Switch".
IEEE Transactions on Communications, vol. COM-28, No. 3, Mar. 1980, pp. 334-344, IEEE, New York, R. V. Cox et al., "Multiple User Variable Rate Coding for TASI and Packet Transmission Systems", p. 334, 1. 9-11.
Alta Frequenza, vol. 43, No. 9 Sep. 1974, pp. 682-418E-689-425E, Milan, It, I. Poretti et al., "Use of Digital Speech Interpolation Equipment to Increase the Transmission Capacity of Telecommunication Systems", p. 683-419E, para. 3, p. 685-421E, 1. 21.

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