High-efficiency fidelity H.265 video information high-capacity hiding method

Abstract

An existing video information hiding algorithm is summarized, an H.265 intra-frame prediction coding method is analyzed, an H.265 video information hiding method based on a coupling coefficient pair is provided. 1-bit data is embedded into an embedding coefficient of a DST / DCT coupling coefficient pair, corresponding compensation coefficients are compensated, and propagation and accumulation of errors in a block are controlled. According to the method, the video effect is greatly improved under the condition of the same embedding amount; the invention proposes the H.265 video information hiding method based on the texture features; the texture features of images are analyzed, coupling coefficient pairs and the texture features are combined, all reference pixels of a reference block cannot transmit embedding errors to adjacent prediction blocks, the problem of intra-frame distortion drift is fundamentally solved, and the method is simple and efficient; the method is suitable for high-super-definition videos and low-resolution videos at the same time, embedding of secret information can not be perceived by naked eyes while high information embedding capacity and good visual secret performance are obtained, and the influence on code streams is small.

Description

technical field [0001] The invention relates to a high-capacity hiding method of H.265 video information, in particular to a high-capacity hiding method of H.265 video information with high efficiency and fidelity, and belongs to the technical field of video information hiding. Background technique [0002] In recent years, with the gradual popularization and application of high-definition, ultra-high-definition video and video applications with resolutions up to 4K×2K and 8K×4K, video compression technology has been greatly challenged. In addition, various digital video applications have entered people's daily life, such as mobile short video, digital video broadcasting, remote monitoring, medical imaging, portable photography, etc., have entered people's life. The diversification and high-definition trend of video applications put forward higher requirements for video compression performance. In this context, the new generation of high-efficiency video coding standard H·2...

AI Technical Summary

Problems solved by technology

[0009] First, the H.265 coding standard uses the intra-frame prediction module to predict pixel values. The principle is to use the coded pixels as reference pixels to predict the pixels of its adjacent prediction units. After the hidden information is embedded, it will Increase or decrease its pixel value, and if the unit block after embedding the hidden information is just used as the reference block of its adjacent block, then the error will be passed to the current prediction block at this time, and so on, the error will always be passed down , resulting in infinite accumulation of errors, which leads to a serious decline in video quality, which is not conducive to the embedding of hidden information, has a greater impact on information security, and the subjective visual effect of the video cannot meet the requirements;

[0010] Second, in the H·265 standard video information capacity concealment process, if only information is embedded in qualified luma blocks (4×4 luma prediction block and 8×8 luma prediction block) without compensation, a Severe intra-frame distortion and drift will cause errors to be transmitted to adjacent luminance blocks in turn, which will eventually lead to a serious decline in video quality, a reduction in the security of video hiding, and the embedding of hidden information can be detected by the naked eye;

[0011] Third, in the intra prediction process, the last row or last column of pixels of the current reference block will be used as its 5 adjacent luminances (respectively upper right adjacent block, right adjacent block, right lower adjacent block, lower adjacent block and left lower adjacent block block) to predict the reference pixels of the block, so if there are embedded errors in these reference pixels, it will be possible (according to the actual intra prediction mode selected) to pass these errors to the five neighboring blocks, and similarly in order Passing on, resulting in intra-frame distortion drift, the transmission and accumulation of errors, seriously reducing video quality, poor embedding capacity and visual stealth effects, and has a greater impact on the bit rate of video streams;

[0012] Fourth, the prior art video information hiding algorithm and analysis of the H.265 intra-frame prediction coding method, information embedding in DST / DCT coefficients will generate block embedded errors, and the errors will be passed to adjacent blocks through the intra-frame prediction process. Intra-frame distortion drift occurs in the luminance block, which affects the subjective visual effect of the video. The existing technology does not compensate the corresponding compensation coefficients, and cannot control the transfer and accumulation of errors in the block. The methods of the existing technology are complicated and inefficient. Suitable for high-definition video and low-resolution video

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