G - Physics – 10 – L
Patent
G - Physics
10
L
G10L 19/02 (2006.01)
Patent
CA 2167327
A voice signal transmission system reduces the amount of an increase in calculation, while suppressing possible deterioration of the performance, by an expansion in the distribution of a voice parameter representative of an envelope of a voice spectrum when an input voice having a plurality of frequency characteristics is treated simultaneously. A discrimination circuit discriminates, based on a voice parameter extracted by a spectrum parameter extraction circuit, another voice parameter obtained by quantization of the extracted voice parameter by a first quantization circuit and a further voice parameter obtained by quantization of the extracted audio parameter by a second quantization circuit, which one of either a third quantization circuit designed corresponding to the first guantization circuit or a fourth quantization circuit designed corresponding to the second quantization circuit should be used. Then, in accordance with a result of the discrimination, the third quantization circuit or the fourth quantization circuit quantizes a quantization error of the corresponding first guantization circuit or second quantization circuit as an error vector. On the reception side, the error vector is dequantized in accordance with the discrimination.
Corporation Nec
G. Ronald Bell & Associates
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