摘要
语音编码技术经历了半个多世纪，其编码速率已从64kb／s压缩到skb／s，并向更低速率进展。本文将回顾这一历程，并探讨今后语音编码的研究方向。
Speech coding technique experiences more than half a century,the codihg rate of which has compressed from 64kb/s to 8kb/s and less.This paper reviews its development course and ex plores future study trend.
关键词
语音编码
线性预测
码激励
Speech coding
Linear predication
Code exciting
