Vector quantizing apparatus

Details Vector quantizing apparatus Vector quantizing apparatus

1995-05-26

1997-10-14

Safourek, Benedict V.

Television

Special applications

Simulator

348422, G10L 702

Patent

active

056779860

ABSTRACT:
A vector quantizing apparatus includes a first search section for obtaining an approximate vector X1 which is approximated to a desired vector R, a residual vector calculator for calculating a residual vector Rv from the desired vector R and the approximate vector X1, a weighting section for obtaining weighted vectors X2 to XN of code vectors x2 to xN, and a second search section for calculating an estimation value which is the magnitude of a projection vector of the residual vector Rv with respect to the vector space formed by the approximate vector X1 and the weighted vectors X2 to XN, and searching a code vector which maximizes this estimation value.

REFERENCES:
patent: 4817157 (1989-03-01), Gerson
patent: 4878230 (1989-10-01), Murakami et al.
patent: 5007092 (1991-04-01), Galand et al.
patent: 5086439 (1992-02-01), Asai et al.
patent: 5140638 (1992-08-01), Moulsley et al.
patent: 5524170 (1996-06-01), Matsuo et al.
Ira A. Gerson, et al., "Vector Sum Excited Linear Prediction (VSELP) Speech Coding at 8 KBPS", Proc. IEEE Int. Conf. on Acoustics, Speech and Signal Processing, pp. 461-464, 1990.

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