Hamming code plus one-based information hiding method of HEVC video

Abstract

The invention discloses a hamming code plus one-based information hiding method of an HEVC video. The method comprises the steps as follows: using a (1, 3,2 ) matrix encoding algorithm in steganography code to combine with an LSBMR algorithm to form a hamming code plus one algorithm, modifying a prediction mode according to three-bit secret information to be embedded to finish information embedding, embedding the three-bit secret information in four continuous 4X4 intra-frame luminance blocks. The hamming code plus one-based information hiding method of the invention not only ensures hiding capacity, but also reduces the impact that the video quality is reduced because of modifying the prediction mode to ensure the subjective and objective quality of the video well, and greatly reduces the impact of embedded secret information to a video bitstream. By analyzing an HEVC coding and decoding structure, modulating the predication node in an intra-frame prediction coding process as the predication node which meets an embedding condition and whose rate-distortion cost is the smallest in terms of a predication unit whose size is 4 plus 4, and using a Lagrange rate-distortion mode to adaptively select the type of the prediction unit of the coding unit, the secret information hiding manner could well ensure the subjective and objective quality of the video.

Description

technical field [0001] The present invention relates to an information hiding technology, in particular to an information hiding method based on Hamming code+1 HEVC (High Efficiency Video Coding) video. Background technique [0002] With the rapid development of Internet technology and the popularization of digital multimedia applications, the phenomenon of counterfeiting and tampering of multimedia information has become increasingly serious, and information security issues have become more and more prominent. As an effective means of covert communication and copyright protection, information hiding technology has developed rapidly. Common information hiding carriers mainly include text, images, audio and video, etc. Digital video has become an important part of multimedia information hiding because of its large data volume and high efficiency. It is usually stored and transmitted in compressed form. HEVC is a new generation of high-efficiency video compression standard af...

AI Technical Summary

Problems solved by technology

Due to the significant difference in the encoding structure between the HEVC standard and the H.264 / AVC standard, the information hiding algorithm for H.264 / AVC video cannot be directly applied to HEVC video

For the information hiding method of HEVC video, Wang et al. established the grouping mapping relationship between the prediction mode and the hidden information according to the statistical probability distribution of the optimal prediction mode and the suboptimal prediction mode. In a 4×4 brightness block in a frame Embedding 2bit secret information, although the embedding capacity has been greatly improved, but it is not universal and has a great impact on the quality of the embedded video

Another example is that Chung et al. proposed a HEVC video information hiding algorithm based on DCT / DST coefficients, which can effectively control intra-frame distortion drift, weaken its cumulative effect, and improve the visual effect of HEVC video. Null hypothesis, not general, and the method has insufficient embedding capacity

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