Fast communication: Selective correlation detector for additive spread spectrum watermarking in transform domain

Authors:
Hyun Wook Kim;Dooseop Choi;Hyuk Choi;Taejeong Kim
Affiliations:
Media Coding Lab, Digital Media & Communication R&D Center, SAMSUNG Electronics, Suwon, Republic of Korea;School of Electrical Engineering and Computer Sciences and Institute of New Media and Communications, Seoul National University, South Korea;School of Computer Science, University of Seoul, South Korea;School of Electrical Engineering and Computer Sciences and Institute of New Media and Communications, Seoul National University, South Korea
Venue:
Signal Processing
Year:
2010

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Abstract

As an improvement on additive spread spectrum (ASS) watermarking, this paper proposes the selective correlation detector (SCD), which performs correlation detection on a portion rather than the whole block of the signal. The portion is determined based on the watermark-to-cover signal power ratio (WCR) and the estimated variance of the correlation. A similar improvement has been obtained by improved spread spectrum (ISS) watermarking [6] (Malvar and Florencio, 2003), but we show that a better performance can be achieved by combining both algorithms. Experiments with or without a psychoacoustic model are conducted on several audio signals, and confirm the improvements by the SCD and by the combined ISS and SCD.