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
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
CLC Number:
KONG Fan-Ceng, JI Zhong-Mei, CUI Wei-Jia. Algorithm for Wireless Video Data Multiplex Unit Extraction[J]. Computer Engineering, 2011, 37(01): 276-279.
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(01): 276-279.