Information steganography method by taking compressed video as carrier

A video signal and video technology, applied in the field of communication and information security, can solve the problems of large computational load, difficult extraction, and increased burden on key exchange links, and achieve the effect of dynamic maintenance, simple extraction operation, and real-time requirements.

Inactive Publication Date: 2009-12-23
刘镔
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AI Technical Summary

Problems solved by technology

Therefore, even if there is enough encoding space to embed the information, it will be very difficult to extract them
[0010] Then B.G.Mobasseri et al.'s algorithm "Watermarking of MPEG-2 Video in Compressed Domain Using VLC Mapping" in ACM Multimedia and SecurityWorkshop in 2005 used the value tree strategy to solve the limitation of the embedded space in VLC coding, but the value tree Constructed by the carrier video participating in the ope

Method used

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  • Information steganography method by taking compressed video as carrier
  • Information steganography method by taking compressed video as carrier
  • Information steganography method by taking compressed video as carrier

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Embodiment Construction

[0041] In the information steganography method using compressed video as a carrier provided by the present invention, the sampling of compressed video signal is represented by variable length coding VLC, and the information embedding process includes the following steps:

[0042] k) Setting the initial key for the three-dimensional digital chaotic system, and four-valuing any two sequences in the generated three real-valued pseudo-random sequences, and binarizing the other sequence;

[0043] l) decoding the carrier video bit stream in the compressed format into a VLC codeword;

[0044] m) number the blocks in each frame sequentially, and select block pairs in pairs according to two four-value sequences;

[0045] n) Exclusive OR preprocessing of secret information by applying a binary sequence;

[0046] o) According to the frame length of the video sequence, the preprocessed secret information is evenly distributed, and the number of secret information bits allocated to each f...

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Abstract

The invention belongs to an information steganography method by taking compressed video as a carrier in the field of communication and information security. The method is characterized by using VLC encoding list in ISO/IEC 13818-2 standard in the realization process to preconstruct a group of increase/decrease pair value tree AST, selecting a certain leaf node of AST in information steganography to automatically guide the operation of an embedding method, thus the size of a compressed video file does not change remarkably before and after information embedding, and the transparency of a video steganography method is ensured. The information embedding and extraction operations of the method are performed completely in VLC domain, thereby avoiding decoding and recoding processes aiming at compressed video stream and meeting the real-time requirement of the video steganography method.

Description

technical field [0001] The invention belongs to the field of communication and information security, in particular to an information steganographic method in the VLC domain of MPEG-2 compressed video based on digital chaos system. Background technique [0002] Information steganography is an important branch of information hiding, and its purpose is to embed information secretly into a carrier and send it out safely without arousing the suspicion of a third party. Carriers that are usually selected as hidden can be various digital resources such as images, audio, video, documents, and software. Due to its large data size, high degree of redundancy, and wide application range, digital video has increasingly significant advantages as a steganographic carrier. In the video steganography method, the information sender can embed secret information into the public video, and only the designated legal receiver can extract the information according to the pre-agreed key, while othe...

Claims

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Application Information

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IPC IPC(8): H04N7/24H04N7/26H04N7/50H04N19/46
Inventor 刘镔刘粉林孙怡峰罗向阳汪萍
Owner 刘镔
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