多制式语音编码及其dsp实现本科生毕业（设计）论文.doc

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 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G.729a、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。 Introduced a multi-standard voice codecs, a single TMS320VC5409 to complete the four-way full-duplex voice communication, and to achieve G.729a, CVSD, ADPCM algorithm between the encoding conversion, the algorithm is given the hardware and software to achieve , The algorithm for computing capacity and occupied by the hardware resources. Voice communications in modern communication 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 voice communications only on the compressed 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 G.729a CVSD ADPCM 目 录 第一章 绪论.......................................................................................1 1.1 引言..............................................................................................1 1.2 三种语音编码简介......................................................................2 1.3 论文研究目的和内容..................................................................4 第二章 语音编码的设计...................................................................5 2.1 G.729a算法..................................................................................5 2.2 ADPCM算法..............................................................................9 2.3 CVSD算法.................................................................................11 第三章 芯片和硬件系统设计...........................................