Vector quantization method, speech encoding method and apparatus

Details Vector quantization method, speech encoding method and apparatus Vector quantization method, speech encoding method and apparatus

1997-09-05

2000-01-25

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, G10L 914

Patent

active

060187077

ABSTRACT:
The code vector search for vector-quantizing a variable-dimension input vector is to be improved in precision. Via a terminal are entered a variable number of data, that is a variable-dimension vector v, representing, for example, the amplitudes of spectral components of the harmonics of speech. The variable-dimension vector v is converted by a variable/fixed dimension conversion circuit into the vector x of a fixed dimension, such as 44-dimension vector, which is sent to a selection circuit. From plural fixed-dimension vectors, such a code vector as minimizes a weighted error is selected from a codebook. The code vector of fixed dimension obtained by the codebook is converted by a fixed/variable dimension converting circuit into the same variable dimension as that of the original variable-dimension vector v. The converted variable dimension code vector is sent to a variable-dimension selection circuit for selecting from the codebook such code vector as minimizes the weighted error from the input vector v.

REFERENCES:
patent: 4868867 (1989-09-01), Davidson et al.
patent: 5502441 (1996-03-01), Swenson
patent: 5717825 (1998-02-01), Lamblin
patent: 5765127 (1998-06-01), Nishguchi et al.

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