Video steganography method based on motion vector local optimality preservation
A motion vector and local optimal technology, applied in the sub-field of information hiding, can solve problems such as being unable to resist attacks, distinguishing common carriers, and destroying the local optimality of motion vectors, so as to improve embedding efficiency and security, reduce impact, and resist The effect of the attack
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[0069] Below through specific embodiment and in conjunction with appendix Figure 5-6 The present invention is further described.
[0070] Before adopting the present invention to steganographically embed secret information, the data to be embedded can be encrypted first to obtain a random binary data stream. The secret information embedding process of the video steganography method based on the local optimality preservation of the motion vector proposed by the present invention is as follows: Figure 5 As shown, the specific operation details are as follows:
[0071] 1) Obtain the video frame that needs to be steganographically embedded, for each motion vector (mv x ,mv y ), get the lowest bit of the sum of its horizontal and vertical components, namely LSB (mv x +mv y ), and form all calculation results into a binary vector x;
[0072] 2) For each motion vector MV in the video frame 0,0 =(mv x ,mv y ), according to the preset motion vector perturbation cost calculat...
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