Title: Reversible data hiding for VQ-compressed images based on search-order coding and state-codebook mapping
Authors: Lin, Chia-Chen
Liu, Xiao-Long
Yuan, Shyan-Ming
Department of Computer Science
Keywords: Data hiding;Vector quantization (VQ);Search-order coding;State-codebook mapping
Issue Date: 1-Feb-2015
Abstract: In the field of digital multimedia, numerous researchers have exploited data hiding for providing secure communications. Because most multimedia is compressed in advance to save storage space and transmission time, this paper presents a reversible data-hiding scheme for vector quantization (VQ)-compressed images. In the proposed scheme, search-order coding (SOC) is first employed to reduce the size of the VQ index table. For image blocks that cannot be processed by SOC, a technique called state-codebook mapping (SCM) is used to map the blocks to the corresponding indices in their state-codebooks, which are generated by a set of neighborhood indices. After SOC and SCM, the size of the output code stream is reduced, and a large amount of space is available for embedding sensitive data. Performance comparisons with similar recent studies are presented for demonstrating the superiority of the proposed scheme. The experimental results indicated that the proposed scheme can achieve a high embedding capacity and a high compression bit rate. (C) 2014 Elsevier Inc. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ins.2014.08.057
ISSN: 0020-0255
DOI: 10.1016/j.ins.2014.08.057
Volume: 293
Begin Page: 314
End Page: 326
Appears in Collections:Articles