| VoIP中丢包恢复的方法 |
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| 引用本文： | 祝轶群,王志伟,张华,高传善.VoIP中丢包恢复的方法[J].计算机工程,2008,34(23):123-124. |
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| 作者姓名： | 祝轶群 王志伟 张华 高传善 |
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| 作者单位： | 复旦大学计算机科学与工程系,上海,200433;复旦-华夏信息技术联合实验室,上海,200433 |
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| 摘 要： | 网络丢包是影响网络电话(VoIP)服务质量的核心因素。Turbo码可以提供数据可靠性，但它编译码的性能却影响其在VoIP中的应用。该文提出通过改进Turbo码的编译码方式使其应用于丢包恢复的思想，包括减少Turbo码迭代译码次数以及根据网络状况自适应地设置交织器大小。实验结果证明，改进的Turbo码可以更好地应用于VoIP传输中的网络丢包恢复。
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| 关 键 词： | 网络电话 丢包 Turbo码 迭代译码 交织器 |
| 修稿时间： | |
Method of Recovery Lost Packet in VoIP |
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| ZHU Yi-qun,WANG Zhi-wei,ZHANG Hua,GAO Chuan-shan.Method of Recovery Lost Packet in VoIP[J].Computer Engineering,2008,34(23):123-124. |
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| Authors: | ZHU Yi-qun WANG Zhi-wei ZHANG Hua GAO Chuan-shan |
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| Affiliation: | (1. Department of Computer Science and Engineering, Fudan University, Shanghai 200433; 2. Fudan-Huaxia Joint Laboratory on Information Technology, Shanghai 200433) |
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| Abstract: | Voice over Internet Protocol(VoIP) service quality is mainle affected by the packet lost problem. Turbo codes can support the reliability in data transitions, but the real-time requirement can not be satisfied. Base on the low performance of Turbo code on network transmission, the paper brings forward a method to improve its performance, including reducing the iteration time when decoding and adaptively setting the interleaver size. Experimental results prove that the advanced Turbo code can be better applied to VoIP. |
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| Keywords: | Voice over Internet Protocol(VoIP) lost packet Turbo codes iterate decode interleaver |
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