分裂式Levinson算法在G.728中的运用  

The application of Split-Levinson algorithm to G.728 and its fixed program optimization on DPS

作　　者：张玉杰[1] 姚天任[1] 

机构地区：[1]华中科技大学电子与信息工程系,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2004年第11期45-47,共3页Journal of Huazhong University of Science and Technology(Natural Science Edition)

摘　　要：在保证语音质量的基础上给出G .72 8语音编码协议中所用部分算法的简化算法 ,该简化算法的主要特点是用分裂式Levinson算法取代G .72 8中原有的传统Levinson算法 ,同时引入独立数组来简化自相关系数的计算 .提出了此算法在DSP上实现时的定点程序优化的方案 .This paper presented some predigested algorithms used in Recommendation G.728. The characteristic of these algorithms were that the traditional Levinson algorithm was replaced by Split-Levinson algorithm, and two independent arrays were defined to simplify the autocorrelation coefficients' calculation. The fixed program optimization on DPS was discussed. It was concluded that the MIPS value was 55?% of the original.

关 键 词：分裂式Levinson算法 语音编码 优化 

分 类 号：TN912.3[电子电信—通信与信息系统]