Abstract
One of the problems for audio watermarks is robustness against signal processing causing de-synchronization of the pseudorandom sequences. To tackle the problem, we previously introduced an audio watermarking method using a two-dimensional pseudo-random array, which is robust against pitch shifting and random stretching to some extent. In this paper, we explain a modification to the detection algorithm to improve the robustness against excessive distortion. The method uses multiple pseudo-random arrays each of which is stretched assuming a certain amount of distortion. Since most of the detection process for the multiple arrays is shared, the additional computational cost is limited.
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Tachibana, R. (2002). Improving Audio Watermark Robustness Using Stretched Patterns against Geometric Distortion. In: Chen, YC., Chang, LW., Hsu, CT. (eds) Advances in Multimedia Information Processing — PCM 2002. PCM 2002. Lecture Notes in Computer Science, vol 2532. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-36228-2_80
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DOI: https://doi.org/10.1007/3-540-36228-2_80
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