Abstract
To solve the problem of H.264 video copyright protection,a new blind watermarking algorithm was proposed.Based on the texture features of the picture,watermarking information was embedded on the Discrete Cosine Transform(DCT) domain of Instantaneous Decoding Refresh(IDR) frames.First,a rectangular sliding window was used to search the region of complex textures.Second,in the selected region,a 4×4 sub-block of maximum energy was chosen for embedding one watermarking bit.Last,one Alternating Current(AC) coefficient value of the selected 4×4 sub-block was modified adaptively.The experimental results show that Peak-Signal-to Noise Ratio(PSNR) decreases 0.15 dB and the bitrate rises 0.49% on average,and the accuracy of watermark detection is above 91%;moreover,the algorithm can effectively resist the re-coded attacks of different Quantization Parameter(QP).
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