G.729A声码器高效基音搜索算法研究  

Research on the high efficient pitch period search algorithm of G.729A vocoder

作　　者：胥霖 彭瑞雪 杨超 

机构地区：[1]装备学院信息装备系 [2]68213部队 [3]装备学院高等教育研究室

出　　处：《信息技术》2012年第2期46-50,共5页Information Technology

摘　　要：为了进一步降低G.729A复杂度,提出了一种高效的基音搜索算法。在对基音搜索的两个环节开环基音分析和闭环搜索进行研究的基础上,分别采用了4:1抽取来减少开环基音分析的搜索范围和改进闭环基音搜索模型的方法。该算法降低了基音搜索时所需要的运算量,在总体上降低了原算法的复杂度。最后通过仿真实验,验证了所提方法的有效性。A high efficient pitch period search algorithm was developed to simplify the complexity of G.729A.The algorithm used 4：1 decimation to reduce the search range of open-loop pitch analysis and improved the model of closed-loop pitch search based on the research on the pitch period search including two parts： open-loop pitch analysis and closed-loop pitch search.The new algorithm reduces the computing load of pitch period search,and simplifies the complexity of the original algorithm generally.Finally,the experiment results testify the validity of the improved algorithm.

关 键 词：G.729A 复杂度 基音搜索 

分 类 号：TN912.3[电子电信—通信与信息系统]