| 一种无线视频数据多路复用单元提取算法 |
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| 引用本文： | 孔范增,季仲梅,崔维嘉. 一种无线视频数据多路复用单元提取算法[J]. 计算机工程, 2011, 37(1): 276-279. DOI: 10.3969/j.issn.1000-3428.2011.01.096 |
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| 作者姓名： | 孔范增 季仲梅 崔维嘉 |
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| 作者单位： | 解放军信息工程大学信息工程学院通信工程系,郑州,450002 |
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| 摘 要： | 在分析基于BP神经网络的多路复合协议数据单元(MUX-PDU)提取算法及其局限性的基础上，根据H.223协议中mobile level 2模式下的MUX-PDU后验信息，提出一种基于BP神经网络及后验信息的联合MUX-PDU提取算法。该算法可动态调整MUX-PDU标识符的判决门限，同时在发生标识符虚警或漏报的情况下，能利用后验信息对提取出的MUX-PDU帧进行校验修正。仿真结果表明，该算法可有效降低MUX-PDU的丢包率，为提高3G视频通话质量提供了可靠保障。
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| 关 键 词： | 视频通话 多路复合协议数据单元 H.223多路复用协议 后验信息 |
Algorithm for Wireless Video Data Multiplex Unit Extraction |
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| KONG Fan-zeng,JI Zhong-mei,CUI Wei-jia. Algorithm for Wireless Video Data Multiplex Unit Extraction[J]. Computer Engineering, 2011, 37(1): 276-279. DOI: 10.3969/j.issn.1000-3428.2011.01.096 |
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| Authors: | KONG Fan-zeng JI Zhong-mei CUI Wei-jia |
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| Affiliation: | (Dept. of Communication Engineering, Information Engineering Institute, PLA Information Engineering University, Zhengzhou 450002, China) |
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| Abstract: | On the basis of an analysis in the MUX-PDU extracting algorithm based on only BP neural network and its limitations, according to the posterior information of MUX-PDU under mobile level-2 in H.223 protocol, a united MUX-PDU extracting algorithm based on BP neural network and posterior information is proposed. This algorithm is able to adjust the decision threshold of MUX-PDU identifier dynamically, and making corrections to the extracted MUX-PDU frames by using posterior information is capable. Simulation result shows that this algorithm is able to decrease the packet loss rate efficiently, which provides a reliable guarantee for video calls in the 3G communication. |
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| Keywords: | video call MUX-PDU H.223 multiplex protocol posterior information |
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