Share Email Print

Proceedings Paper

Estimation of amplitude modifications before SCS watermark detection
Author(s): Joachim J. Eggers; Robert Baeuml; Bernd Girod
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

New blind digital watermarking schemes that are optimized for additive white Gaussian noise (AWGN) attacks have been developed by several research groups within the last two years. Currently, the most efficient schemes, e.g., the scalar Costa scheme (SCS), involve scalar quantization of the host signal during watermarking embedding and watermark reception. Reliable watermark reception for these schemes is vulnerable to amplitude modification of the attacked host signal. In this paper, a method for the estimation of possible amplitude modifications before SCS watermark detection is proposed. The estimation is based on a securely embedded SCS pilot watermark. We focus on linear amplitude modifications, but investigate also the extension to nonlinear amplitude modifications. Further, the superiority of our proposal over an estimation method based on a spread-spectrum pilot watermark is demonstrated.

Paper Details

Date Published: 29 April 2002
PDF: 12 pages
Proc. SPIE 4675, Security and Watermarking of Multimedia Contents IV, (29 April 2002); doi: 10.1117/12.465297
Show Author Affiliations
Joachim J. Eggers, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Robert Baeuml, Friedrich-Alexander-Univ. Erlangen-Nuernberg (Germany)
Bernd Girod, Stanford Univ. (United States)

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

© SPIE. Terms of Use
Back to Top