The ability of detecting efficiency and discovering unknown attack is improved, the security of the system is enhanced, and evaluating the security level of the whole system is availability.
提高了检测效率和发现未知攻击的能力，增强了系统的安全性，可以有效的对整个系统进行安全级别的评估。
Using this method, it is not necessary to fully decompress MPEG video sequence. Both the efficiency and detecting effect is improved dramatically.
实验结果表明，本文算法只需对压缩视频流进行半解码，提高了检测效率，改善了检测效果。
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