Miniature linear prediction vocoder

Details Miniature linear prediction vocoder Miniature linear prediction vocoder

F - Mech Eng,Light,Heat,Weapons

02

K

354/50, 354/53

F02K 3/00 (2006.01)

Patent

CA 1235815

ABSTRACT A linear prediction vocoder having improved noise immunity and error masking. Error masking is obtained in the synthesizer by extrapolating a pitch interval value, between the frame preceding and following a faulty voiced frame, and using the extrapolated pitch value, the reflection coefficients and residual energy of the preceding frame in replacement of the faulty frame. The preceding frame is repeated in place of the faulty frame in case it is unvoiced. The analyzer apparatus determines whether indicated pitch values exceed a predetermined threshold, to indicate that the frame is voiced, The threshold is raised if the frequency of the zero crossings is high, whereby the threshold is biased toward being unvoiced. The threshold is lowered is either or both the frequency of the zero crossings is low and the overall energy is high and the low frequency energy is significant.

488381

Affiliated with

Also associated with

Rating

Miniature linear prediction vocoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Miniature linear prediction vocoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Miniature linear prediction vocoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1197597