Embedding method and extracting method for HEVC video information hiding

Abstract

The invention discloses an embedding method and an extracting method for HEVC video information hiding. The embedding method comprises the following steps: acquiring a video to be used as a carrier, and receiving secret information to be embedded by a user; encrypting the secret information by adopting a single letter replacement cryptographic algorithm to obtain encrypted secret information; decoding the video, and selecting a 4 * 4 brightness DST coefficient block with an I-frame intra-frame residual absolute value greater than a threshold T as an alternative embedded block; and if the intra-frame prediction mode of the adjacent block of the alternative embedded block meets a preset condition for preventing intra-frame distortion drift, embedding the encrypted secret information into thealternative embedded block meeting the preset condition by adopting a matrix coding embedding method. The security of the secret information can be effectively ensured, and meanwhile, the embedding capacity and the visual concealment are relatively good, and the visual effect is good.

Description

technical field [0001] The invention belongs to the field of information technology, and more specifically relates to an embedding method and an extraction method of HEVC video information hiding. Background technique [0002] The existing HEVC video information hiding algorithms can be divided into original domain embedding, compressed domain embedding and bitstream domain embedding. The information hiding method embedded in the original domain embeds the hidden information directly into the original code stream to form an embedded video containing the hidden information, and then performs HEVC video compression encoding. This method needs to go through the video compression process, which will cause some secret information to be lost, which is not conducive to information extraction. The built-in information hiding method embedded in the compressed domain is that the embedding process and the video encoder are combined into a unified whole. The sender embeds hidden inform...

AI Technical Summary

Problems solved by technology

In addition, embedding in intra prediction mode is less robust, especially against re-encoding and re-weighting attacks

Embedding in motion vectors causes inter-frame distortion drift and also limits embedding capacity

[0004] Therefore, the extraction-type built-in HEVC information hiding methods in the prior art are mostly embedded in the quantized DST coefficients. However, usually embedding in the quantized DST coefficients will reduce the visual quality of the video, thereby limiting the capacity of information hiding. ground, which also limits the operational space of security and robustness hardening techniques

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