Video information hiding method and device based on inter-block decoupling

Abstract

The invention relates to a video information hiding method and device based on inter-block decoupling. The method includes the following steps: (1) inputting a carrier video to be embedded and obtaining the channel parameters thereof, wherein the channel parameters include whether each block is a non-reference block, the values of non-zero DCT coefficients in each non-reference block and the embedding cost of each non-reference block; (2) carrying out steganographic coding by taking the non-zero DCT coefficients in all the non-reference blocks as the carrier of a covert channel; and (3) compressing the carrier video to be embedded, and using the lowest bit to replace and modify the non-zero DCT coefficients in all the non-reference blocks according to the channel parameters acquired in step (1) and the coding result obtained in step (2) in the process of compression to obtain a steganographic video file. The generation of the cost drift phenomenon is avoided by using the technology ofdecoupling between carrier blocks. The method and the device are especially suitable for a covert communication scenario requiring low real-time performance and high security performance.

Description

technical field [0001] The present invention relates to a video information hiding (Video Information Hiding) method, in particular to an adaptive information hiding design framework mainly suitable for H.264 / AVC compressed video, and a specific information hiding method and device. This method uses discrete cosine transform (Discrete Cosine Transform, DCT) coefficients generated by intra-frame predictive coding as embedding elements, based on inter-block decoupling technology, and achieves the purpose of minimizing embedding cost while realizing message embedding, which belongs to the field of information security technology. The information hiding subfield of . Background technique [0002] Currently, the information hiding technology using digital multimedia content as a carrier is mainly divided into two categories: Steganography and Digital Watermarking. Steganographic technology is mainly used for covert communication, which can embed secret information into digital ...

AI Technical Summary

Problems solved by technology

However, this method cannot apply the STC-based cost minimization embedding model in the I-frame DCT coefficient domain, so that it cannot achieve true adaptive embedding.

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