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| A Reversible Data Hiding Algorithm Based on Dynamic Distortion-Compensated Quantization Index Modulation |
| Ye Tian-yu; Niu Xin-xin; Ma Zhao-feng; Yang Yi-xian |
| Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China; Key Laboratory of Network and Information Attack & Defence Technology of MOE, Beijing University of Posts and Telecommunications, Beijing 100876, China; National Engineering Laboratory for Disaster Backup and Recovery, Beijing University of Posts and Telecommunications, Beijing 100876, China |
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Abstract The concept of dynamic Distortion-Compensated Quantization Index Modulation (dynamic DC-QIM) is proposed, which differs from the conventional DC-QIM in whether or not quantization step size and DC parameter are changeable. Firstly, the condition satisfying the reversibility of dynamic DC-QIM is deduced. Then, the allowable range of DC parameter is derived. Finally, the procedure of reversible data hiding algorithm based on dynamic DC-QIM is designed. Its data hiding rate can achieve as high as 1bpp in a single iteration, higher than its former counterparts. Furthermore, the use of dynamic characteristic is in favor of preventing its parameters from being disclosed. Experimental results show that it not only accurately decodes the secret information, but also perfectly restores the original cover, regardless of initial conditions.
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Received: 09 June 2009
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Corresponding Authors:
Ye Tian-yu
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2010, Vol. 32 
