A DWT-based Digital Video Watermarking Scheme with Error Cor(11)

Abstract. In this paper, a digital video watermarking algorithm is proposed. We present a novel DWT-based blind digital video watermarking scheme with scrambled watermark and error correcting code. Our scheme embeds different parts of a single watermark in

3.4 Experiment with Attacks on Watermarked Frame

DWT inherits many advantages in resisting the attacks on the watermarked frames. It achieves both spatial and frequency localization, perceptual invisibility and attacks by image processing techniques [15]. Cropping is one of the attacks applied to video frequently. Fig. 13 shows the result of the watermarked video under different ratio of

cropping. It is also found that the proposed scheme gives the best result.

Fig. 13. NC values under cropping

4. Conclusion and Future Work

This paper proposes an innovative blind video watermarking scheme with scrambled watermarks and error correcting code. The process of this video watermarking scheme, including watermark preprocessing, video preprocessing, watermark embedding, and watermark detection, is described in detail. Experiments are performed to demonstrate that our scheme is robust against attacks by frame dropping, frame averaging, and statistical analysis. Robustness of the scheme is enhanced by combining with audio watermarks. The scheme can be improved by making use of the information from the video, such as time information, to increase the robustness of the watermark. We will conduct this improvement in the future. References

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