Complex cepstrum analyzer for speech signals

Details Complex cepstrum analyzer for speech signals Complex cepstrum analyzer for speech signals

1995-02-23

1997-10-14

MacDonald, Allen R.

395 24, G10L 706

Patent

active

056779844

ABSTRACT:
Respective samples of input speech data are transformed by a discrete Fourier transformer to obtain a spectrum of the speech data. Simultaneously, values of times of the respective samples are multiplied with the input speech data by a multiplier and a differential spectrum is obtained by transforming a result of the multiplication by a discrete Fourier transformer. A real part of a value obtained by dividing the differential spectrum by the spectrum by a quotient real part calculator and the real part is inverse-transformed by a discrete inverse Fourier transformer. The result of the inverse-transformation is divided by the values of the times of the respective samples to obtain a time function corresponding to phase. On the other hand, a time function corresponding to a logarithmic amplitude spectrum is obtained from an output of the inverse-Fourier transformer by means of a logarithmic amplitude spectrum calculator. A complex cepstrum is obtained by adding the both time functions at respective times by an adder.

REFERENCES:
patent: 3662108 (1972-05-01), Flanagan
patent: 4374304 (1983-02-01), Flanagan
Bednar et al., "Calculating the Complex Cepstrum Without Phase Unwrapping or Integration," ASSP-33 No. 4, pp. 1014-1017, Aug. 1985.

Affiliated with

Also associated with

Rating

Complex cepstrum analyzer for speech signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1560415