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随着数字通信技术的发展及商业应用的增加,语音压缩技术得到迅猛发展;G.729就是其中比较优秀的算法。阐述了G.729A算法的基本原理,分析了该算法的详细流程。在ITU-T所提供的标准C代码的基础上优化了G.729A语音编解码系统,对串行化模块进行改进,并使编解码模块接口化,达到语音编解码实时性的要求。最终将其封装成动态链接库,生成的DLL为IP电话系统、多媒体网络传输系统、视频会议等不同的扩展应用提供加载。
With the development of digital communication technology and the increase of commercial applications, voice compression technology has been developed rapidly. G.729 is one of the best algorithms among them. The basic principle of G.729A algorithm is expounded, and the detailed flow of the algorithm is analyzed. Based on the standard C code provided by ITU-T, the G.729A speech codec system is optimized, the serialization module is improved, and the codec module is interfaced to achieve the real-time requirement of speech codec. Finally, it is encapsulated into a dynamic link library, the generated DLL for IP phone system, multimedia network transmission system, video conferencing and other extended applications to provide loading.