A novel steganography scheme for video H.264/AVC without distortion drift

摘要

Many steganography schemes have been proposed for video sequences. However, the embedding capacity obtained by these schemes is still unsatisfactory. In this paper, a novel steganography scheme has proposed to further improve the embedding capacity while guaranteeing high visual quality of embedded video H.264/AVC sequences. In the proposed scheme, quantized DCT coefficients are divided into two different clusters, hiding cluster and preventing cluster. Then, the hiding cluster is used for embedding the secret data with small distortion while the preventing cluster is used for avoiding the distortion drift in stego video sequence. In the proposed scheme, the embedding modification direction table is constructed for embedding data. By doing so, the distortion in the embedded video sequence is maintained as small as possible. Experimental results demonstrated that the proposed scheme outperforms to other existing schemes in terms of embedding capacity while maintaining good visual quality.