The accurate description of track model and excitation model is the key of the Medium-low rate speech coding.

如何准确的建立声道模型和激励模型成为中低速语音编码的关键。

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Segment vocoder is an efficient very low bit rate speech coding algorithm. Speech segment method, one of the key technology of segment vocoder, is studied and a new algorithm is presented.

分段声码器是一种高效的低速语音编码方法，针对分段声码器实现的关键技术语音分段方法进行了研究，提出了一种分段新算法。

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Segment vocoder is an efficient very low bit rate speech coding algorithm. Speech segment method, one of the key technology of segment vocoder, is studied and a new algorithm is presented.

分段声码器是一种高效的低速语音编码方法，针对分段声码器实现的关键技术语音分段方法进行了研究，提出了一种分段新算法。

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