Large Capacity Data Hiding Combined with Secure-intra-watermarking Based on H.264/AVC

In this study, a method of using the watermark to enhance the security of the data hiding is proposed for H.264/AVC. The DCT coefficients in Intra-frames are modified to embed the watermark while the secrete information is inserted by modulating the appropriate MVD in P and B frames. The introduced Intra-watermarking, on one hand, can authenticate the integrity of the video stream. Furthermore, by the detected Intra-watermark and its integrity, the receiver can determine the reliability of the extracted hided information and judge whether the video has suffered from various attacks in addition, the security of the secrete communication can be guaranteed. Experiment results demonstrate that this scheme can achieve a large hiding capacity with low bit-rate increase, while the real-time performance can also be obtained.