Speech analysis method and speech encoding method and apparatus

Details Speech analysis method and speech encoding method and apparatus Speech analysis method and speech encoding method and apparatus

1997-10-07

2000-08-22

Zele, Krista

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

G10L 1104

Patent

active

061086215

ABSTRACT:
A speech analysis method and a speech encoding method and apparatus in which, even if the harmonics of the speech spectrum are offset from integer multiples of the fundamental wave, the amplitudes of the harmonics can be evaluated correctly for producing a playback output of high clarity. To this end, the frequency spectrum of the input speech is split on the frequency axis into plural bands in each of which pitch search and evaluation of amplitudes of the harmonics are carried out simultaneously using an optimum pitch derived from the spectral shape. Using the structure of an harmonics as the spectral shape, and based on the rough pitch previously detected by an open-loop rough pitch search, a high-precision pitch search comprised of a first pitch search for the frequency spectrum in its entirety and a second pitch search of higher precision than the first pitch search is carried out. The second pitch search is performed independently for each of the high range side and the low range side of the frequency spectrum.

REFERENCES:
patent: 3681530 (1972-08-01), Manley et al.
patent: 4214125 (1980-07-01), Mozer et al.
patent: 4538234 (1985-08-01), Honda et al.
patent: 4821324 (1989-04-01), Ozawa et al.
patent: 4850022 (1989-07-01), Honda et al.
patent: 5115240 (1992-05-01), Fujiwara et al.
patent: 5127053 (1992-06-01), Koch
patent: 5473727 (1995-12-01), Nishiguchi et al.
patent: 5577159 (1996-11-01), Shoham
patent: 5596675 (1997-01-01), Ishii et al.
patent: 5630012 (1997-05-01), Nishiguchi et al.
patent: 5664052 (1997-09-01), Nishiguchi et al.
patent: 5715365 (1998-02-01), Griffin et al.
patent: 5717819 (1998-02-01), Emeott et al.
patent: 5732392 (1998-03-01), Mizuno et al.
patent: 5737718 (1998-04-01), Tsutsui
patent: 5749065 (1998-05-01), Nishiguchi et al.
patent: 5752222 (1998-05-01), Nishiguchi et al.
patent: 5873059 (1999-02-01), Iijima et al.
G. Yang et al.,Multiband Code-Excited Linear Prediction for Speech Coding, Signal Processing: European Journal Devoted to the Methods and Applications of Signal Processing, vol. 31, No. 2, pp. 215-227 (Mar. 1993).
H. Hassanein et al., Frequency Selective Harmonic Coding at 2400 bps, Proceedings of the Midwest Symposium on Circuits and Systems, vol. 2, pp. 1436-1439 (Aug. 1994).

Affiliated with

Also associated with

Rating

Speech analysis method and speech encoding method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speech analysis method and speech encoding method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speech analysis method and speech encoding method and apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-592807