An information hiding method for HEVC video

Abstract

The invention provides a method for hiding HEVC (High Efficiency Video Coding) video information. The method comprises two steps of secret information embedding and secret information extracting; during secret information embedding, a prediction model is modulated in an intra-frame prediction coding process aiming at 4*4 prediction units by analyzing an HEVC coding and decoding structure, an intra-frame coding mode is selected in a self-adapting manner by using a Lagrangian rate-distortion model to decide whether to embed secret information; a corresponding relation between two bits of information to be embedded and angle difference intervals of the prediction model, completed information embedding of the prediction model is corrected according to the two bits of information to be embedded, a prediction model of only one prediction unit in the two continuous 4*4 prediction units in most cases is required to be corrected, so that correction bits is reduced under the same hiding capacity, and influence on the video quality, which is caused by the embedded secret information is reduced; objective and subjective video quality can be well ensured, and influence on a video bitstream, which is caused by the embedded secret information is greatly reduced.

Description

technical field [0001] The present invention relates to an information hiding technology, in particular to an information hiding method of HEVC (High Efficiency Video Coding) video. Background technique [0002] With the wide application of multimedia and the rapid development of network technology, the application and dissemination of digital information has become an indispensable part of people's life. At the same time, the phenomenon of counterfeiting, tampering and attacking of digital information is becoming more and more serious, and the problem of information security is becoming more and more prominent. Information hiding technology helps to curb the illegal use of digital multimedia. At present, information hiding technology has become a research hotspot in the field of information security. [0003] HEVC is a new-generation video compression coding standard formulated by the International Telecommunication Organization and the Mobile Video Expert Group. It is a h...

AI Technical Summary

Problems solved by technology

In the study of the concealment scheme based on the modulation prediction mode, Hu et al. completed the embedding according to the mapping relationship between the prediction mode of the 4×4 luminance block in the frame and the hidden information by modulating the intra-frame prediction mode. This information hiding method is due to the fact that the mapping relationship is It is established based on the statistical results of multiple video test sequences, and different video test sequences may have differences, so this information hiding method does not have universal applicability; Yang et al. introduced matrix coding to establish the secret information and prediction mode. Mapping relationship, two bits of hidden information are embedded in the 4×4 brightness blocks within three frames, and only one bit of prediction mode needs to be modified. Although this information hiding method reduces the number of bits modified by the prediction mode, the information embedding rate is not high , hide low capacity

At present, there is no specific report on the information hiding algorithm for HEVC video, and because the encoding structure of HEVC is different from that of H.264 / AVC, the information hiding algorithm for H.264 / AVC video cannot be directly applied to HEVC on video

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