Method, system and device for modifying video steganography by combining trailing coefficient of N-dimensional cubic coding

Abstract

The invention discloses a method, a system and a device for modifying video steganography by combining a trailing coefficient of N-dimensional cubic coding, and the method comprises the steps: firstlycalculating an N-dimensional cubic feature value of a specifically screened trailing coefficient, carrying out the modification according to a specific embedding mechanism, just obtaining the trailing coefficient of an embedded block during blind extraction, and recalculating the N-dimensional cubic coding feature value of the embedded block; at the moment, converting the obtained numerical valueinto a binary system, namely embedded secret information, calculating an N-dimensional cubic characteristic value of a trailing coefficient by combining the trailing coefficient with a good embeddingcharacteristic in a video carrier, selecting a specific embedding mechanism for modification, only the trailing coefficient of an embedded block needs to be obtained during extraction, and recalculating the N-dimensional cubic code of the embedded block, at the moment, the obtained numerical value is converted into a binary system which is the embedded secret information, the invisibility is high, the modification rate is low, and meanwhile bit rate increase is small.

Description

technical field [0001] The invention belongs to the field of video information steganography, and in particular relates to a method, system and device for modifying video steganography in combination with trailing coefficients of N-dimensional cubic coding. Background technique [0002] With the rapid development of the network, people's life has become more convenient, but the security problems that follow follow one after another. As an important branch of information security, steganography plays an important role in protecting the transmission security of secret information. [0003] With the advent of the 5G era, people are more willing to share what they see and feel in the form of video, so there are a lot of multimedia files filled with video carriers on the Internet. Steganography technology is to store secret information on an open channel and transmit it in an open way, so it is of great practical significance to study the steganography algorithm with video as th...

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Problems solved by technology

[0007] Someone also proposed a steganography algorithm based on tree structure motion compensation in inter-frame prediction mode, which increases the embedding capacity of the algorithm by forcing an additional prediction frame and using it as the reference frame of the current frame, but at the same time causes the overall video carrier The large increase in capacity is not conducive to real-time network transmission, and at the same time, the modification rate of the carrier is relatively large

[0008] There is also a new video steganography algorithm based on motion vectors. By introducing appropriate embedding rules, it can better maintain the carrier characteristics in the embedding process and increase the embedding efficiency at the same time, but the bit rate of the code stream after steganography increases greatly. Not conducive to network transmission

[0009] To sum up, whether using special motion vectors, inter-frame prediction, intra-frame prediction or DCT coefficients in the video, when modifying them, there will be a large modification rate or a large increase in the bit rate, which is not conducive to embedding Fast transfer of post-video carriers

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