Method of storing reflection coeffients in a vector quantizer fo

Details Method of storing reflection coeffients in a vector quantizer fo Method of storing reflection coeffients in a vector quantizer fo

1996-02-29

1998-10-20

Knepper, David D.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704217, 704219, G10L 914, G10L 908

Patent

active

058262245

ABSTRACT:
An input speech signal is encoded as one or more reflection coefficients. To reduce storage requirements, the reflection coefficients are scalar quantized by storing an N-bit code rather than the entire reflection coefficient. An exemplary value for N is 8. A table is provided having 2.sup.N reflection coefficient values. The N-bit code is used to look up reflection coefficient values from the table. To reduce spectral distortion due to scalar quantization, the reflection coefficient values in the table are non-linearly scaled.

REFERENCES:
patent: 4544919 (1985-10-01), Gerson
patent: 4896361 (1990-01-01), Gerson
patent: 4965789 (1990-10-01), Bottau et al.
patent: 4975956 (1990-12-01), Liu et al.
patent: 5012518 (1991-04-01), Liu et al.
patent: 5038377 (1991-08-01), Kihara et al.
patent: 5295224 (1994-03-01), Makamura et al.
patent: 5307460 (1994-04-01), Garten
patent: 5351338 (1994-09-01), Wigren
Furui, Sadaoki, Digital Speech Processing, Synthesis, and Recognition, 1989, New York, NY, pp. 118-119.
Rabiner and Schafer, Digital Processing of Speech Signals, 1978, by Bell Laboratories, Inc., USA, p. 452.
R. Viswanathan et al., "Quantization Properties of Transmission Parameters in Linear Predictive Systems," IEEE Trans. Acoustics, Speech and Signal Processing, vol. ASSP-23, Jun. 1975, pp. 309-321.
Y. Linde et al., "An Algorithm for Vector Quantizer Design", IEEE Transactions on Communications, vol. Com-28, No. 1, Jan. 1980, pp. 84-95.
Motorola, Inc., "Vector Sum Excited Linear Prediction (VSELP) 7950 Bit per Second Voice Coding Algorithm--Technical Description", Nov. 14, 1989, pp. 9-11.
Y. Shoham, "Cascaded Likelihood Vector Coding of the LPC Information", Proceedings of the International Conference on Acoustics, Speech, and Signal Processing, 1989, pp. 160-163.
K. Paliwal et al., "Efficient Vector Quantization of LPC Parameters at 24 Bits/Frame", Proceedings of the International Conference on Acoustics, Speech and Signal Processing, 1991, pp. 661-664.
B. Battacharya et al., "Tree Searched Multi-Stage Vector Quanitzation of LPC Parameters for 4kb/s Speech Coding", Proceedings of the International Conference on Acoustics, Speech and Signal Processing, Mar. 1992, pp. I-105 to I-108.
T. Parsons, Voice and Speech Processing, 1987, pp. 159-161.

Affiliated with

Also associated with

Rating

Method of storing reflection coeffients in a vector quantizer fo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of storing reflection coeffients in a vector quantizer fo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of storing reflection coeffients in a vector quantizer fo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-259792