The use of discrete wavelet transform method (Mallat algorithm), to realize the dual-channel voice signal sub-band coding. Voice signal, C125Hz low-frequency signals completely retained in the 125Hz band fly KHz voice signal using wavelet decomposition level for more precise quantification and filtering, while the use of high-frequency part of Run-made, thus ensuring the voice signal under the premise of the original characteristics of a substantial compression of voice signals to transmit data volume of

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yasuo.m

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