Arrangement for discriminating speech signals from noise

Details Arrangement for discriminating speech signals from noise Arrangement for discriminating speech signals from noise

1978-02-06

1979-06-19

Claffy, Kathleen H.

179 1VC, G10L 100

Patent

active

041587499

ABSTRACT:
An audio squelch circuit uses spectral analysis of the audio signal to derive two test signals, one of the two indicating speech presence "energy" and the other "voiced" speech presence. The two test signals are logic-AND combined to decide speech presence and open the squelch gate. Detection of speech in the audio signal, composed of a voiced segment which is both preceded and followed by a non-voiced (consonant) segment, is improved by correspondingly lengthening the "voiced" test signal pulse with both earlier (anticipatory) initiation by a time interval "D," and with a later (prolonged) completion by a time interval "d".

REFERENCES:
patent: 3944753 (1976-03-01), Proctor et al.
patent: 4001505 (1977-01-01), Araseki et al.
patent: 4027102 (1977-04-01), Ando et al.

Affiliated with

Also associated with

Rating

Arrangement for discriminating speech signals from noise does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for discriminating speech signals from noise, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for discriminating speech signals from noise will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-56907