多制式语音编码及其dsp实现本科毕业（设计）论文.doc

I本科毕业设计多制式语音编码及其 DSP 实现 Multi-standard speech coding and DSP Implementation II 摘要介绍了一种多制式语音编解码器,在单片 TMS320VC5409 上完成 4路话音的全双工通信,并实现 、CVSD 、ADPCM 算法之间的编码转换,给出了算法的软硬件实现、算法的运算量及所占用的硬件资源。语音通信在现代通信中占有重要地位,它研究的是语音信号的高效、高质量传输的问题,包括语音编码、语音加密等内容。虽然语音通信仅研究对语音信号进行压缩传输等内容,在理论上比语音合成与语音识别简单,但是这一领域仍然存在很多需要解决的问题,而且这项技术仍处于不断发展之中。关键词:多制式语音编解码 TMS320VC5409 CVSD ADPCM III ABSTRACT Introduced a multi-standard voice codecs, a single TMS320VC5409 plete the four-way full-duplex munication, and to achieve , CVSD, ADPCM algorithm between the encoding conversion, the algorithm is given the hardware and software to achieve , The algorithm puting capacity and occupied by the hardware resources. munications in munication occupies an important position, it is the voice signal on the efficient, high-quality transmission problems, including voice coding, voice encryption, and other content. Although munications only on pressed voice signal transmission, etc., in theory than voice synthesis and voice recognition simple, but there are still many areas that need to resolve the issue, but the technology is still in continuous development. Key words: Multi-standard voice codecs TMS320VC5409 CVSD ADPCM IV 目录第一章绪论.................................................................................... ...1 引言..............................................................................................1 三种语音编码简介......................................................................2 论文研究目的和内容..................................................................4 第二章语音编码的设计...................................................................5 算法..................................................................................5 ADPCM 算法..............................................................................9 CVSD 算法.................................................................................11 第三章芯片和硬件系统设计................................................