Time-Frequency Analysis of Digital Audio Watermarking

Time-Frequency Analysis of Digital Audio Watermarking

Sridhar Krishnan (Ryerson University, Canada) and Behnaz Ghoraani (University of British Columbia, Vancourver, Canada)
DOI: 10.4018/978-1-59904-513-9.ch009
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Abstract

In this book chapter, we present an overview of our time-frequency (TF) based audio watermarking methods. First, a motivation on the necessity of data authentication, and an introduction in Digital Rights Management (DRM) to protect digital multimedia contents is presented. TF techniques provide flexible means to analyze non-stationary audio signals. We have explained the joint TF domain for watermark representation, and have employed pattern recognition schemes for watermark detection. In this chapter; we introduce two watermarking methods; embedding non-linear and linear TF signatures as watermarking signatures. Robustness of the proposed methods against common signal manipulations is also studied in this chapter.

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