| Design and Analysis of a Scalable Watermarking Scheme for the Scalable Audio Coder (2008) | |||||||||||||||
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| Abstract — In this paper, we present a scalable approach to design lossless watermark for audio. The proposed watermarking framework is built on a recently standardized two-layer scalable audio coder AAZ [1]. By embedding watermark in both the core layer and enhancement layer bitstreams in a special way, the watermark distortion in either layer is compensated by the watermark in the opposite layer. The proposed spread-spectrumbased solution overcomes both the problem of introducing noninvertible distortions in lossy watermark approaches and the problem of non-adaptive embedding in lossless watermarking approaches. Theoretic analysis and experiment results further confirm the validity of the proposed framework in terms of payload, robustness, data expansion property and perceptual quality. Index Terms — watermarking, scalable audio coding, spread spectrum, AAZ I. | |||||||||||||||
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