Journal of Applied Sciences ›› 2016, Vol. 34 ›› Issue (5): 633-650.doi: 10.3969/j.issn.0255-8297.2016.05.016

• Special Issue: Information Security of Multimedia Contents • Previous Articles    

Reversible Audio Watermarking Based on Non-causal Prediction and Histogram Shifting

XIANG Shi-jun, CHEN Zhao-long   

  1. School of Information Science and Technology, University of Jinan, Guangzhou 510632, China
  • Received:2016-08-04 Revised:2016-08-17 Online:2016-09-30 Published:2016-09-30

Abstract:

Prediction algorithms play an important role in reversible audio watermarking. This paper presents a novel prediction algorithm for reversible watermarking. A prediction parameter is obtained from relations among each group of three consecutive samples, and an optimum prediction coefficient is then calculated by averaging all these parameters in a clip. The prediction value of the current sample and the corresponding prediction error are computed. Since the prediction error is non-integer, we use an improved histogram shifting method to embed the additional data. The proposed scheme can better explore audio samples' correlations by using non-causal prediction and computing prediction parameter in a statistical way. We demonstrate validity of the scheme with a set of six standard audio files. Compared with three state-of-art schemes, the proposed scheme has lower embedding distortion with the same payload.

Key words: reversible watermarking, non-causal prediction, histogram shifting

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