Double MPEG-4 Compression Detection Method Based on Blockiness Metric

Abstract

The present invention provides a dual MPEG-4 compression detection method and system based on blocking effect measurement. The method comprises: decompressing the input video to be a frame sequence, and extracting the brightness component of each frame and the macro block coding information; performing self-adaptive deblocking filtering of the brightness component of each frame; calculating the absolute value cumulative sum of the differences of the filtered brightness component and the original brightness component, taking the absolute value cumulative sum as the blocking effect measurement of each frame, and enhancing the blocking effect measurement by employing a macro block variation abnormal mode to obtain a feature sequence; and finally, performing periodicity analysis of the feature sequence, determining whether the input video is subjected to dual MPEG-4 compression and estimating the size of the GOP which is compressed and used at the first time. The dual MPEG-4 compression detection method and system based on the blocking effect measurement can effectively employ the abnormal blocking effect periodically appeared in the dual MPEG-4 compression video to allow the detection method to have more robustness and wider application. Compared to a traditional detection method, the dual MPEG-4 compression detection method and system based on the blocking effect measurement allow the motion video with complex texture to have the more reliable detection effect.

Description

technical field [0001] The invention relates to the technical field of video double compression detection, in particular to a double MPEG-4 compression detection method based on block effect measurement. Background technique [0002] With the continuous development of multimedia storage technology and transmission technology, multimedia has become an important information transmission carrier and means, and is widely used in security, judicial, education, medical and other fields. However, more and more low-cost and powerful video editing software can be easily obtained, and tamperers can delete and tamper with video content without professional knowledge. Therefore, it is necessary to verify the integrity and authenticity of the video content. In addition, codecs based on MPEG-4 standards have been widely used in surveillance systems and network transmissions, and video forensics technology for MPEG-4 needs to be proposed urgently. [0003] Since the video tampering opera...

AI Technical Summary

Problems solved by technology

The two defects of this technical solution are: the double encoding is required to use the same GOP structure; the detection method needs to recompress the video multiple times, resulting in low computing efficiency

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