Fixed sound source vector generation method and fixed sound...

Details Fixed sound source vector generation method and fixed sound... Fixed sound source vector generation method and fixed sound...

2003-02-20

2009-08-25

Opsasnick, Michael N (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

Reexamination Certificate

active

07580834

ABSTRACT:
At the speech encoding end, upon generation of an fixed excitation vector, the shape of an excitation vector output from pulse excitation codebook301is identified in pulse excitation vector shape identifier302, a dispersion vector used for excitation vectors of the shape is output from dispersion vector storage304, and, in dispersion vector convolution processor303, dispersion vector convolution processing of the excitation vector is performed. In particular, when a pulse excitation vector having a specific shape of high frequency of use is output from pulse excitation codebook301, pulse excitation vector shape identifier302controls dispersion vector storage304in such a way that an additional dispersion vector prepared dedicated to the pulse excitation vector is output. By this means, it is possible to provide a technology that improves the quality of decoded speech and that decodes speech more natural and audible to the user.

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