Method and apparatus for speech detection on pcm multiplexed...

Details Method and apparatus for speech detection on pcm multiplexed... Method and apparatus for speech detection on pcm multiplexed...

H - Electricity

04

J

363/1

H04J 6/02 (1980.01)

Patent

CA 1077627

ABSTRACT OF THE DISCLOSURE The disclosure herein describes a method and a system for speech detection on PCM multiplexed voice channels; for each channel, a decision is reached every M samples regarding the channel activity; in addition, the nature of speech is detected as: voiced (compact or non-compact) or unvoiced (fricative or non-fricative) when the channel is active; pure silence, white noise or echo when the channel is inactive. The decision is based on the joint value of the amplitude, zero crossing of the signal and zero crossing of the signal deriva- tive.

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