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Proceedings Paper

Improved watermarking scheme by reference signal mingling
Author(s): Soo-Chang Pei; Jun-Horng Chen
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Paper Abstract

Various watermarking schemes were developed in an attempt to address the piracy issue. One of the most important requisites for an effective watermarking scheme is its robustness. A robust watermarking scheme means the embedded watermark can still be extracted successfully from an attacked watermarked data. Regardless of the motivations, the attacked watermarked data should have an acceptable quality, that is, an attacker can't remove the embedded watermark without penalty. In this paper, we propose the robustness can be improved by mingling a reference signal during watermark embedding. The knowledge of reference signal at receiver end makes better channel estimation and lower probability of detection error. To show the performance improved by mingling reference watermark, we applied it to quantization-based image watermarking in discrete cosine transform (DCT) domain and watermarked image was attacked by JPEG compression. The simulation results will show mingling reference signals really achieved better performance. Having the same quality of attacked watermarked image, probability of error with reference signals mingling could be lower than without it.

Paper Details

Date Published: 29 April 2002
PDF: 8 pages
Proc. SPIE 4675, Security and Watermarking of Multimedia Contents IV, (29 April 2002); doi: 10.1117/12.465303
Show Author Affiliations
Soo-Chang Pei, National Taiwan Univ. (Taiwan)
Jun-Horng Chen, National Taiwan Univ. (Taiwan)


Published in SPIE Proceedings Vol. 4675:
Security and Watermarking of Multimedia Contents IV
Edward J. Delp; Ping Wah Wong, Editor(s)

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