Skip to Main Content
The paper presents an analysis of the perceptual impact of watermarking on the stationarity of audio signals. Indeed, the embedded watermark is piecewise stationary, so it modifies the stationarity of the original audio signal. This study is based on stationarity indices, which represent a measure of the variations in the spectral characteristics of signals, using time frequency representations. Simulation results with two kinds of signals, test signals and audio signals (speech and music) are presented. Comparison stationarity indices between watermarked and original audio signals show a significant stationarity enhancement of the watermarked signal, especially for transient attacks.
Date of Conference: 6-10 April 2003