波形内插语音编码模型作为当今最具潜力的低速率语音编码方案之一，因其良好的性能，越来越受到人们的重视。

As one of the current most potential low bit rate speech coding schemes, waveform interpolation model with its high performance has been paid more and more attention.

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全面论述了极低速率语音编码算法中运用的方法理论及最新的研究成果，并对这些算法进行了比较和分析，得出结论。

Algorithms and new research results in very low bit rate speech coding is presented thoroughly in this paper, and conclusions are given through comparison and analysis.

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本文提出了一种适用于低速率语音编码系统的基音周期量化算法。

This paper proposed a pitch quantization method for low bit-rate speech coding systems.

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