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Video steganalysis method and device based on analyzing cavlc codewords and number of non-zero DCT coefficients

A technology of video steganography and number, which is applied in the field of video steganalysis. It can solve the problems of large amount of calculation and weak steganalysis ability, so as to alleviate the mismatch of carrier source, improve performance and stability, and alleviate the problem of carrier source. The effect of the mismatch phenomenon

Active Publication Date: 2022-01-11
INST OF INFORMATION ENG CHINESE ACAD OF SCI
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Problems solved by technology

Since the video steganography method based on the DCT coefficient domain belonging to JCE has little influence on the spatial and temporal domains of the video, this method has weak ability to analyze the steganographic analysis based on the DCT coefficient domain belonging to JCE
Moreover, the calculation of this method involves operations such as convolution, and the calculation amount is relatively large.

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  • Video steganalysis method and device based on analyzing cavlc codewords and number of non-zero DCT coefficients
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  • Video steganalysis method and device based on analyzing cavlc codewords and number of non-zero DCT coefficients

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Embodiment Construction

[0048] Below through specific embodiment and in conjunction with appendix figure 2 The present invention is further described.

[0049] The video steganalysis method based on analyzing the number of CAVLC code words and non-zero DCT coefficients proposed by this embodiment, its flow is as follows figure 2 As shown, the specific operation details are as follows:

[0050] 1) Frame group division: Divide the compressed video to be tested into several frame groups, each frame group is composed of continuous video frames, and the video frames possessed are not overlapped with each other and have the same number.

[0051] 2) For a frame group F containing N 4×4 brightness macroblocks g , perform steps 3) to 6) to extract steganalysis features.

[0052] 3) Preprocessing: For frame group F g Each 4×4 luminance macroblock obtains its corresponding CAVLC codeword B n (n∈[1,N]). If the video is encoded with other types of entropy, decode to obtain its corresponding DCT coefficien...

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Abstract

The invention relates to a video steganographic analysis method and device based on the analysis of CAVLC code words and the number of non-zero DCT coefficients. The method comprises: dividing the compressed video to be tested into several frame groups; for each frame group, by analyzing the correlation between the CAVLC entropy code word and the non-zero DCT coefficient numbers of adjacent 4×4 brightness macroblocks , to obtain the video steganalysis features; using the obtained video steganalysis features, a classifier is used to conduct a steganographic classification judgment for each frame group in the compressed video to be tested. The present invention extracts four types of sub-features, and finally obtains 635-dimensional steganalysis features. The present invention can effectively detect the current existing video steganography method in the DCT coefficient domain, can effectively alleviate the carrier source mismatch phenomenon in the steganalysis analysis to a certain extent, has a large scope of application, and can be based on different video coding standards DCT coefficient domain video steganography for effective analysis.

Description

technical field [0001] The present invention relates to the field of video steganalysis (Video Steganalysis), which belongs to the sub-field of information hiding in the field of information security technology, specifically an analysis of DCT coefficient domain video steganalysis based on the analysis of CAVLC codewords and the number of non-zero DCT coefficients Methods and Apparatus. Background technique [0002] The purpose of steganography is to conceal the fact and content of the secret message being sent. In contrast, the goal of steganalysis is to determine whether there is an embedded secret message in a multimedia file. In recent years, with the rapid development of streaming media and Internet video services, digital video is gradually replacing images as the most influential media. Therefore, video steganography and steganalysis have become current research hotspots. [0003] Commonly used embedded elements include Intra Prediction Mode, Inter Prediction Mode,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/625H04N19/467H04N19/13H04N19/176H04N19/91
CPCH04N19/625H04N19/467H04N19/91H04N19/13H04N19/176
Inventor 余建昌张弘赵险峰
Owner INST OF INFORMATION ENG CHINESE ACAD OF SCI
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