A method using an optimal data hiding technique for covert communication via H.264/AVC videos is proposed. An H.264/AVC video consists of a series of I and P image frames. We propose roper hiding techniques for macroblocks in I and P frames by utilizing their properties, respectively.
We hide data into the intra-prediction mode of the I macroblock, and into the tree structured motion compensation of the P macroblock. Briefly, we modify the prediction mode and the variable partition size of the tree structured motion compensation to hide data and maintain imperceptibly of the hidden data. In addition, we also use the Lagrange optimization technique to optimize the changes yielded by the data hiding process. Experimental results show the feasibility of the proposed method.
Relation:
Optimal data hiding in H.264/AVC videos for covert communication
