一种基于DSP语音信号线性与非线性量化相互转换的新方法  

A Novel Method for Transformation Between Linear Quantification and Non-linear Quantification of the Phonetic Signals Based on DSP

作　　者：宋依青[1] 何松[1] 

机构地区：[1]常州工学院计算机信息工程学院,江苏常州213002

出　　处：《微电子学与计算机》2008年第11期59-63,共5页Microelectronics & Computer

摘　　要：文中首先对A律对数PCM的基本原理及算法进行了讨论,提出一种基于分段映射法实现A律对数PCM压缩和解压缩编码的方法,设计并实现了以TMS320VC5416为核心的语音压缩系统,并给出实现的具体原理框图.采用该方法可避免很复杂的对数和反对数计算,使信号处理速度快,同时也克服了传统的查表法要求有较大的存储空间的缺点,是一种比较好且实用的方法.This paper first discusses the basic principle and the algorithm of a law logarithm PCM,and then proposes a method based on the phased mapping for the compression encoding and the decompression encoding,and designs and realizes a phonetic compression system taking TMS320VC5416 as the core,and shows the concrete functional block diagram.The very complex logarithm computation and the inverse logarithm calculation can be avoided using this method,and speed up signal processing,and overcome shortcomings of the traditional lookup table method which needs the large storage space.Therefore the algorithm proposed in this paper is a good and useful method.

关 键 词：对数脉冲编码调制 语音压缩 G.711 DSP处理器 

分 类 号：TN911.3[电子电信—通信与信息系统]