H.264 large-capacity information hiding method based on information variable-length packet structure

An information hiding and information group technology, applied in the field of video information hiding, can solve the problems of lack of inter-frame information, difficulty in guaranteeing algorithm transparency, and limiting algorithm information hiding capacity, etc., to achieve the effect of alleviating contradictions.

Inactive Publication Date: 2014-11-12
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Literature [3] embeds identification information by modulating the inter-frame prediction modes of all macroblocks, and hides 2 bits of identification information for each macroblock. Using the inter-frame information generated by encoding limits the information hiding capacity of the algorithm
Moreover, the above three algorithms do not consider the problem that the macroblock itself is suitable for hiding information characteristics.

Method used

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  • H.264 large-capacity information hiding method based on information variable-length packet structure
  • H.264 large-capacity information hiding method based on information variable-length packet structure
  • H.264 large-capacity information hiding method based on information variable-length packet structure

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Experimental program
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Effect test

Embodiment 1

[0063] The process of hiding identification information in the present invention is specifically as follows Figure 5 shown.

[0064] (1) Information hiding execution steps

[0065] Step 1: Read the binary identification image WM image (M×N), the image is converted into a set of binary code stream WM after Zig-zag scanning and simple scrambling sequence [i](i=0,1,2,…,(M×N-1), then WM sequence[i] Adaptively divided into identification information groups with a length of 2 or 3 bits to form a WM pair [j]=w j w j+1 or w j w j+1 w j+2 (j=0,1,2,...,(M×N-1)).

[0066] Step 2: Judging whether the current block belongs to the "embedding point exclusion rule (1)", if it does, this block is not used to hide information, and jumps to the next macro block to re-judgment in this step. Otherwise, proceed to the next step.

[0067] Step 3: Determine whether the current block belongs to the "embedding point exclusion rule (2)" and if so, this block is not used to hide information, ...

Embodiment 2

[0078] The H.264 large-capacity information hiding method based on the information variable-length packet structure is characterized in that it includes the following contents:

[0079] message variable length packet

[0080] H.264 inter-frame coding specifies seven block modes (16×16, 16×8, 8×16, 8×8, 8×4, 4×8, 4×4), and adopts a tree-based motion compensation, each 16×16 macroblock can be divided into one 16×16 block, or two 16×8 blocks, or two 8×16 blocks, or four 8×8 blocks. When the 8×8 mode is selected for the macroblock, each 8×8 block can be further divided into 1 8×8 block, or 2 8×4 blocks, or 2 4×8 blocks, or 4 4×4 blocks;

[0081] Each division of the information to be hidden can be converted into a binary 01 code representation, and any identification file can eventually be converted into a series of binary code streams. Using the improved Exp-Golomb code word structure idea, the binary identification information can be divided into 7 types of length The non-rep...

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Abstract

The invention discloses an H.264 large-capacity information hiding method based on an information variable-length packet structure. The method is specifically characterized in that an information variable-length packet concept is introduced at an H.264 inter-frame prediction link, the identifier information is classified into seven groups of unrepeatable full-information groups with the length of 2 to 3bits by utilizing the improved Exp-Golomb code word structure concept, and seven varieties of mapping rules between the inter-frame prediction mode and the information groups to be hidden. On the basis of the mapping rule, the inter-frame prediction mode of the existing macro block is modulated to realize the hiding of the video information. The position of a host macro block is determined by a prescribed embedded point exclusive rule, each host macro block corresponds to two or 3 bites of identifier information, so that the large-capacity requirement of the video information hiding algorithm can be satisfied. The extraction process of the identifier information is free from utilizing an original video and can be completed only by decoding inter-frame prediction mode part in the code stream, so that the video real-time processing requirement can be met.

Description

technical field [0001] The invention relates to a video information hiding method, in particular to a large-capacity information hiding algorithm based on an information variable-length grouping structure in the video coding standard H.264. Background technique [0002] Information hiding technology is a means of communication that embeds secret information into public digital media (such as text, images, audio, video, etc.) and transmits it secretly without attracting the attention of a third party. Generally speaking, information hiding technology has two important characteristics of embedding capacity and security. The former can ensure that enough data can be transmitted during communication; while the security requires that the algorithm does not cause artificial modification traces to the host video. key to ensure that even if the covert communication is discovered, the information cannot be accurately extracted. In recent years, image information hiding technology h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/467H04N19/109H04N19/147H04N19/176
Inventor 蒋建国齐美彬宣曼尤小泉夏娜张国富苏兆品洪日昌汪萌詹曙吴从中李小红
Owner HEFEI UNIV OF TECH
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