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计算机工程 ›› 2011, Vol. 37 ›› Issue (01): 276-279. doi: 10.3969/j.issn.1000-3428.2011.01.096

• 开发研究与设计技术 • 上一篇    下一篇

一种无线视频数据多路复用单元提取算法

孔范增,季仲梅,崔维嘉   

  1. (解放军信息工程大学信息工程学院通信工程系,郑州 450002)
  • 出版日期:2011-01-05 发布日期:2010-12-31
  • 作者简介:孔范增(1982-),男,助理工程师、硕士研究生,主研方向:无线通信;季仲梅,教授;崔维嘉,讲师、博士

Algorithm for Wireless Video Data Multiplex Unit Extraction

KONG Fan-zeng, JI Zhong-mei, CUI Wei-jia   

  1. (Dept. of Communication Engineering, Information Engineering Institute, PLA Information Engineering University, Zhengzhou 450002, China)
  • Online:2011-01-05 Published:2010-12-31

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。

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

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.

Key words: video call, MUX-PDU, H.223 multiplex protocol, posterior information

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