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This paper presents a new embedding strategy to extend the performance bound of spread spectrum (SS) based watermarking by introducing more imperceptible distortions measured in the mean square errors (MSE). The potential of the host is sufficiently exploited and utilized to maximize the watermark robustness. This strategy is then realized in audio watermarking by adaptively inverting the host according...
This paper describes an informed unipolar spread spectrum (SS) modulation to improve the performance of SS-based watermark extraction with self-synchronization. Compared with bipolar SS, unipolar SS, realized by employing a pair of orthogonal codes to represent the watermark bits, is more robust against the distorted correlation between the received watermarked signal and the reference. The informed...
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