Non-blind audio-watermarking using compression-expansion of signals

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Non-blind audio-watermarking using compression-expansion of signals

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Title: Non-blind audio-watermarking using compression-expansion of signals
Author: Foo, Say Wei
Copyright year: 2008
Abstract: One of the advantages of non-blind watermarking scheme is that the original signal must be available to extract the watermark. As such, the possession of the original signal becomes important in the proof of ownership. In this paper, a non-blind audio-watermarking method is proposed. The method makes use of compression-expansion of adjacent frames of samples of the audio signal. Some frames of the signal are thus ‘modified’. The modified frames can be readily identified by comparing them with the original signal. The modified frames can be used to embed hidden information. By applying psychoacoustic model in the compression-expansion process, it is found that the modification does not affect the quality of the audio signal. The embedding of watermarks for single channel audio signal and two-channel stereo signals require different approaches which are described in detail in the paper. The performance of the method under several types of attacks is assessed. It is found that high percentage of recovery can be achieved with spectrally rich audio signals.
Type: Conference Paper
Conference name: IEEE Asia Pacific Conference on Circuits and Systems (2008 : Macau)
School: School of Electrical and Electronic Engineering
Rights: ©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder. http://www.ieee.org/portal/site.
Version: Published version

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