| 摘要 |
The invention provides a voice signal transmission system which reduces the amount of 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 voisce pectrum when input voice having a plurality of frequency characteristics is treated simultaneously. Discrimination circuit 5 discriminates, based on a voice parameter extracted by spectrum parameter extraction circuit 2, another voice parameter obtained by quantization of the extracted voice parameter by first quantization circuit 3 and a further voice parameter obtained by quantization of the extracted audio parameter by second quantization circuit 4, which one of either third quantization circuit 6 designed corresponding to first quantization circuit 3 or fourth quantization circuit 7 designed corresponding to second quantization circuit 4 should be used. Then, in accordance with a result of the discrimination, third quantization circuit 6 or fourth quantization circuit 7 quantizes a quantization error of corresponding first quantization circuit 3 or second quantization circuit 4 as an error vector. On the reception side, the error vector is dequantized in accordance with the discrimination.
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