CAVLC codewords substitution for H.264/AVC video data hiding

摘要: This paper addresses the problem of hiding secret message in bitstream H.264/AVC compressed videos. Challenges behind data-hiding are twofold: one is to maintain drift error caused by process as minimum possible, and other keep bit-rate unaffected after message. In paper, a new codeword substitution approach developed that employs level-suffix codewords domain accommodate bitstream. The proposed method guarantees marked be intact makes resultant controllable choosing suitable levelsuffix for data. Experimental results have shown exhibits good performance terms both capacity reconstructed visual quality.