Multi-segment vector quantizer for a speech coder suitable for u

Details Multi-segment vector quantizer for a speech coder suitable for u Multi-segment vector quantizer for a speech coder suitable for u

1996-03-08

1997-10-07

Knepper, David D.

395 226, G10L 908

Patent

active

056757026

ABSTRACT:
A Vector-Sum Excited Linear Predictive Coding (VSELP) speech coder provides improved quality and reduced complexity over a typical speech coder. VSELP uses a codebook which has a predefined structure such that the computations required for the codebook search process can be significantly reduced. This VSELP speech coder uses single or multi-segment vector quantizer of the reflection coefficients based on a Fixed-Point-Lattice-Technique (FLAT). Additionally, this speech coder uses a pre-quantizer to reduce the vector codebook search complexity and a high-resolution scalar quantizer to reduce the amount of memory needed to store the reflection coefficient vector codebooks. Resulting in a high quality speech coder with reduced computations and storage requirements.

REFERENCES:
patent: 4544919 (1985-10-01), Gerson
patent: 4896361 (1990-01-01), Gerson
R. Viswanathan and J. Makhour, "Quantization Properties of Transmission Parameters In Linear Predictive Systems", IEEE Trans. Acoust., Speech, Signal Processing, vol. ASSP-23, pp. 309-321, Jun. 1975.
Y. Linde, A. Buzo and R. M. Gray, "An Algorithm For Vector Quantizer Design", IEEE Trans. on Comm., vol. Com-28, No. 1, pp. 84-95, Jan. 1980.
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," Proc. of Int. Conf. on Acoustics, Speech and Signal Proc., pp. 160-163, 1989.
K.K. Paliwal and B. S. Atal, "Efficient Vector Quantization of LPC Parameters at 24 Bits/Frame," Proc. of Int. Conf. on Acoustics, Speech and Signal Proc., pp. 661-664,1991.
B. Bhattacharya, et al., "Tree searched Multi-Stage Vector Quantization of LPC Parameters for 4 kb/s Speech Coding," Proc. of Int. Conf. on Acoustics Speech and Signal Proc., pp. I-105 to I-108, Mar. 1992.

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