Digital Audio Watermarking by Magnitude Modification of Frequency Components Using the CSPE Algorithm
Wang , Jian and Healy, Ron and Timoney, Joseph (2009) Digital Audio Watermarking by Magnitude Modification of Frequency Components Using the CSPE Algorithm. In: Proceedings of the China-Ireland Information and Communications Technologies Conference CIICT 2009, 18th-21st August 2009, National University of Ireland Maynooth.
In this paper we describe a process whereby the magnitude of either one or two frequency components of a signal is modified in order that it may be used to encode a hidden message within a signal in such a way as the casual observer would have no way of noticing the presence of a hidden message. Previous work has used filtering and signal addition to achieve the same goals. The current work improves on this by using a recent super-resolution component-identification technique to isolate the components to modify, limiting the impact on the quality of the signal.
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