Vector quantizing apparatus and speech analysis-synthesis system

Details Vector quantizing apparatus and speech analysis-synthesis system Vector quantizing apparatus and speech analysis-synthesis system

1991-10-15

1995-01-24

MacDonald, Allen R.

G10L 900

Patent

active

053848918

ABSTRACT:
A vector quantizing apparatus having a general vector quantization circuit, and a storage means for storing at least one frame of data as the result of comparison by a matching circuit is provided. Further, provided are a speech analysis-synthesis system having a spectral envelope generator for generating a spectral envelope which is so smooth that excessive beating is avoided, a spectral envelope vector converter for sampling the spectral envelope at equal intervals on mel-scale, a vector quantizer for quantizing vectors, and a spectral envelope reconstructor for reconstructing the spectral envelope by interpolation on the basis of combined parabolas.

REFERENCES:
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patent: 4815134 (1989-03-01), Picone et al.
patent: 4860355 (1989-08-01), Copperi
patent: 5077798 (1991-12-01), Ichikawa et al.
patent: 5086471 (1992-02-01), Tanaka et al.
S. Roucos, et al., "Segment Quantization for Very-Low-Rate Speech Coding," Proc. ICASSP, 1982, pp. 1565-1568. (English).
Sadaoki Furui, "Digital Speech Processing," Tokai University Press, Sep. 1985, pp. 52-57. (Japanese).
I. A. Gerson, et al., "Vector Sum Excited Linear Prediction (VSELP)," Proc. IEEE Workshop on Speech Coding for Telecommunications, 1989, pp. 66-68. (English).

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