摘要
根据H.264的宏块编码特性,提出了一种直接在H.264压缩域内进行镜头突变检测的算法。对于I帧,通过对帧内所有宏块的预测模式建立一个矩阵,最后与当前I帧相对应位置宏块的帧内预测模式进行比较,检测是否发生突变;对于P帧和B帧,通过分析帧内宏块的预测模式及相邻帧之间的相关性来进行检测。实验结果表明,该算法具有较高的查全率和查准率。
This paper puts forward an algorithm of abrupt shot transition detection directly within H. 264 compressed domain according to macro blocking coding features of H. 264; for frame I, establishes a matrix for the prediction mode of all intra-frame macro blocks, finally makes a comparison with the intra-frame prediction mode of macro blocks in the corresponding position of the current frame I and detects whether abrupt transition ocurrs; and, for frames P and B, conducts a test on the prediction mode of intra-frame macro blocks and relativity of adjacent frames. The experimental result shows that this algorithm has a high recall ratio and precision ratio.
出处
《浙江理工大学学报（自然科学版）》
2013年第2期213-217,共5页
Journal of Zhejiang Sci-Tech University(Natural Sciences)
基金
国家自然科学基金(61105035)
浙江省自然科学基金(Y1100656)
关键词
H
264
镜头突变
预测模式
矩阵
H. 264
abrupt shot transition
prediction mode
matrix
