G.723.1语音编解码算法分析及优化  

Analysis and Optimization of G.723.1 Speech Codec Algorithm

作　　者：吴欣茹[1] 徐隽 

机构地区：[1]西安工业大学北方信息工程学院,西安710025 [2]西安傲林软件有限公司,西安710075

出　　处：《科学技术与工程》2010年第7期1637-1642,共6页Science Technology and Engineering

摘　　要：在分析了G.723.1双速率语音编解码算法的基础上,针对ARM11处理器的特性,对G.723.1定点标准C代码进行了算法和语言级的优化,使得实时编解码成为可能。通过测试表明,优化过的代码比原始代码效率提高了74%—90%,所使用到的优化方法切实可行。The encoding and decoding algorithm of G. 723.1 dual-rate speech codec are analyzed. Based on the ARMll processor, several methods are used to optimize the fixed-point standard C code of G. 723.1. These methods make the real-time encoding and decoding beeome possible. The test results show that the efficiency of the optimized code is increased by 74%--90% compared with that of the original one, and the optimization methods used are feasible.

关 键 词：G.723.1 语音编码 优化 

分 类 号：TN912.3[电子电信—通信与信息系统]