Voice analysis-synthesis method using noise having diffusion whi

Details Voice analysis-synthesis method using noise having diffusion whi Voice analysis-synthesis method using noise having diffusion whi

1997-06-09

1999-03-02

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704208, 704220, 704221, 704230, G10L 904

Patent

active

058783881

ABSTRACT:
A high efficiency encoding method for encoding data on frequency axis obtained by dividing an input audio signal on block-by-block basis and converting the signal onto the frequency axis, wherein V bands are searched for a band B.sub.VH with the highest center frequency if it is decided that there are one or more shift points of voiced (V)/unvoiced (UV) decision data of all bands on the frequency axis, and wherein the number of V bands N.sub.V up to the band B.sub.VH is found, so as to decide whether proportion of the V bands is equal to or higher than a predetermined threshold N.sub.th, thereby deciding one V/UV boundary point. Thus, it is possible to replace the V/UV decision data for each band by information on one demarcation in all bands, thereby to reduce data volume and to reduce bit rate. Also, by using two-stage hierarchical vector quantization in quantizing the data on the frequency axis, operation volume for codebook search and memory capacity of the codebook are reduced.

REFERENCES:
patent: 4710812 (1987-12-01), Murakami et al.
patent: 5010574 (1991-04-01), Wang
patent: 5115240 (1992-05-01), Fujiwara et al.
patent: 5151941 (1992-09-01), Nishiguchi et al.
patent: 5157760 (1992-10-01), Akagiri
patent: 5272529 (1993-12-01), Frederiksen
patent: 5274741 (1993-12-01), Taniguchi et al.
patent: 5294925 (1994-03-01), Akagiri
patent: 5299240 (1994-03-01), Iwahashi et al.
patent: 5361323 (1994-11-01), Murata et al.
patent: 5375189 (1994-12-01), Tsutsui
patent: 5384891 (1995-01-01), Asakawa et al.
patent: 5414795 (1995-05-01), Tsutsui et al.
patent: 5440345 (1995-08-01), Shimoda
patent: 5471558 (1995-11-01), Tsutsui
patent: 5473727 (1995-12-01), Nishiguchi et al.
patent: 5594833 (1997-01-01), Miyazawa
patent: 5630012 (1997-05-01), Nishiguchi et al.
patent: 5634082 (1997-05-01), Shimoyoshi et al.
patent: 5642111 (1997-06-01), Akagiri
patent: 5664052 (1997-09-01), Nishiguchi et al.
patent: 5737718 (1998-04-01), Tsutsui
*Gersho et al., "Variable Rate Vector Quantization," Vector Quantization and Signal Compression, Gersho et al. Kluwer Academic Publishers, pp. 127, 204-206, 461-470, 602, 605, 631-640, Nov. 1991.
*Gersho et al., "Vector Quantization Techniques in Speech Coding," and Pitch and Voicing Determination Advances in Speech Signal Processing, Editors, Furui and Sondhi, Dekker, pp. 3/84, 1/91.

Affiliated with

Also associated with

Rating

Voice analysis-synthesis method using noise having diffusion whi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voice analysis-synthesis method using noise having diffusion whi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voice analysis-synthesis method using noise having diffusion whi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-433247