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Spread transform watermarking for video sources

Earl, J and Kingsbury, N (2003) Spread transform watermarking for video sources. IEEE International Conference on Image Processing, 2. pp. 491-494.

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Spread Transform (ST) is a quantization watermarking algorithm in which vectors of the wavelet coefficients of a host work are quantized, using one of two dithered quantizers, to embed hidden information bits; Loo had some success in applying such a scheme to still images. We extend ST to the video watermarking problem. Visibility considerations require that each spreading vector refer to corresponding pixels in each of several frames, that is, a multi-frame embedding approach. Use of the hierarchical complex wavelet transform (CWT) for a visual mask reduces computation and improves robustness to jitter and valumetric scaling. We present a method of recovering temporal synchronization at the detector, and give initial results demonstrating the robustness and capacity of the scheme.

Item Type: Article
Divisions: Div F > Signal Processing and Communications
Depositing User: Cron job
Date Deposited: 16 Jul 2015 14:11
Last Modified: 04 Oct 2015 05:10