| 基于G.729的固定码书搜索的改进性研究 |
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| 引用本文： | 张艳萍,朱忠进,王文龙.基于G.729的固定码书搜索的改进性研究[J].南京气象学院学报,2011(6):533-538. |
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| 作者姓名： | 张艳萍 朱忠进 王文龙 |
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| 作者单位： | 南京信息工程大学电子与信息工程学院, 南京 210044;南京信息工程大学电子与信息工程学院, 南京 210044;南京信息工程大学电子与信息工程学院, 南京 210044 |
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| 基金项目： | 江苏省自然科学基金(BK2009410) |
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| 摘 要： | 在详细阐述G.729协议的CS-ACELP算法工作原理的基础上,分析了该算法各功能模块的算法复杂度,针对其总体复杂度较高,对硬件实现条件要求较高的问题,对复杂度相对较高的固定码书搜索部分采用减少脉冲搜索位置和补充搜索相结合的方式进行了改进,加快了码书的搜索速度,降低了算法复杂度.通过对改进后的算法进行实验仿真,验证了其可行性和有效性.
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| 关 键 词： | 固定码书搜索 共轭代数码激励线性预测(CS-ACELP) 算法复杂度 |
| 收稿时间： | 2010/11/25 0:00:00 |
Fixed codebook improvement research based on G.729 |
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| ZHANG Yanping,ZHU Zhongjin and WANG Wenlong.Fixed codebook improvement research based on G.729[J].Journal of Nanjing Institute of Meteorology,2011(6):533-538. |
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| Authors: | ZHANG Yanping ZHU Zhongjin and WANG Wenlong |
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| Institution: | 1. School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044;1. School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044;1. School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044 |
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| Abstract: | Beginning with a detailed introduction of CS-ACELP algorithm based on G.729 protocol,this paper does analysis of the algorithm''s computational complexity of each functional modules,which shows high complexity and high demanding for the hardware system.Thus some improvements are made by reducing the impulse locations and adding general search in the low correlation impulse locations,which can accelerate the fixed codebook search and reduce the computational complexity.Experiment simulation is carried out to verify the feasibility and effectiveness of the improved algorithm. |
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| Keywords: | fixed codebook search CS-ACEL pcomplexity of the algorithm |
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