本文简要介绍了语音压缩编码的新进展，并且着重介绍低码率语音编码在新近几年所取得的进展。
In this paper, developments of speech compression coding are briefly introduced, and importance is attached to recent advances in speech coding at low bit rates.
在移动通信系统中采用变速率语音压缩编码，可以最大限度地发挥系统的效能，而变速率语音编码的核心技术就是自适应技术。
The mobile communication system can furthest fulfill its function if variable rate speech coding is adopted, and the very core of this coding is the adaptive technology.
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