Digital Audio Watermarking by Yong Xiang Guang Hua & Bin Yan

Author:Yong Xiang, Guang Hua & Bin Yan
Language: eng
Format: epub
Publisher: Springer Singapore, Singapore

Apart from the above mentioned solutions that introduce extra components during either watermark embedding or extraction to facilitate watermark resynchronization, advanced desynchronization-resilient audio watermarking systems tend to investigate better features for watermark embedding, which is termed feature domain audio watermarking. Such type of features differ from log coordinate mapping (LCM) feature [33] and logarithmic DCT domain feature [22] by being robust against desynchronization attacks, i.e., the features remain unchanged even after desynchronization attacks, rather than being changed but detectable in [33] and [22]. One of such features is called robust audio feature in [34]. We will introduce the solution proposed in [34] in detail.

A robust audio segment extractor (RASE) is proposed in [34] to obtain the feature robust against desynchronization attacks. Let y(n) be the unprocessed host audio samples with length N, then the RASE first calculates the first-order derivative of y(n) via

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