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Robust and high quality video watermarking with the use of temporal redundancy

Authors Tsang, K.F.
Au, O.C. HKUST affiliated (currently or previously)
Issue Date 2001
Source Proceedings of SPIE - The International Society for Optical Engineering , v. 4314, 2001, p. 55-63
Summary In this paper, we present a new video watermarking technique, which utilize the characteristic of temporal redundancy of video sequence to improve the quality and robustness of the watermarked sequence. The proposed watermarking technique can be combined with many existing 2D image-watermarking algorithm to take advantage of their robustness against various attacks. For every watermark bit ai, the pseudo random sequence (-1)ai p is added to the mid-band coefficients of a block and the complementary sequence, i.e., -(-1)ai p is added to the same block in another frame of the insertion pair. To retrieve the embedded watermark bit, the block in the first frame is substracted by the same block of the second frame, resulting in a watermark with double the magnitude (-1)ai p-[-(-1)ai p] = 2(-1)ai p. Since adjacent video frames are highly correlated and the DCT coefficients are almost the same (especially in non-moving regions), the substraction of the block pair also cancels out most of the interfering DCT coefficients originated from the host signal, such that the interference to the watermark signal from the host signal is minimized during detection. Experiment shows that the probability of receiving an error bit can be reduced or the picture quality is improved while maintaining the same probability of error.
ISSN 0277-786X
ISBN 0-8194-3992-4
Rights Copyright 2001 Society of Photo-Optical Instrumentation Engineers. This paper was published in Security and Watermarking of Multimedia Contents III, Ping Wah Wong, Edward J. Delp III, Editors, Proceedings of SPIE Vol. 4314, p. 55-63 (2001) and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Language English
Format Conference paper
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