基于H.264压缩域内宏块预测模式的镜头突变检测  

Abrupt Shot Transition Detection Based on Prediction Mode of Macro Block within H.264 Compressed Domain

作　　者：郭俊超[1] 孙树森[1] 桂江生[1] 张华熊[1] 

机构地区：[1]浙江理工大学信息学院,杭州310018

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)

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.

关 键 词：H 264 镜头突变 预测模式 矩阵 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]