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Article Dans Une Revue Multimedia Systems Année : 2014

Robust drift-free bit-rate preserving H.264 watermarking

Wei Chen
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Zafar Shahid
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Florent Autrusseau
Patrick Le Callet

Résumé

This paper presents a novel method for open-loop watermarking of H.264/AVC bitstreams. Existing watermarking algorithms designed for previous encoders, such as MPEG-2 cannot be directly applied to H.264/AVC, as H.264/AVC implements numerous new features that were not considered in previous coders. In contrast to previous watermarking techniques for H.264/AVC bitstreams, which embed the information after the reconstruction loop and perform drift compensation, we propose a completely new intra-drift-free watermarking algorithm. The major design goals of this novel H.264/AVC watermarking algorithm are runtime-efficiency, high perceptual quality, (almost) no bit-rate increase and robustness to re-compression. The watermark is extremely runtime-efficiently embedded in the compressed domain after the reconstruction loop, i.e., all prediction results are reused. Nevertheless, intra-drift is avoided, as the watermark is embedded in such a way that the pixels used for the prediction are kept unchanged. Thus, there is no drift as the pixels being used in the intra-prediction process of H.264/AVC are not modified. For watermark detection, we use a two-stage cross-correlation. Our simulation results confirm that the proposed technique is robust against re-encoding and shows a negligible impact on both the bit-rate and the visual quality.
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Dates et versions

hal-00951742 , version 1 (18-08-2014)

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Wei Chen, Zafar Shahid, Thomas Stutz, Florent Autrusseau, Patrick Le Callet. Robust drift-free bit-rate preserving H.264 watermarking. Multimedia Systems, 2014, 20 (2), pp.179--193. ⟨10.1007/s00530-013-0329-x⟩. ⟨hal-00951742⟩
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