Huffman-code strategies to improve MFCVQ-based reversible data hiding for VQ indexes

Authors:
Cheng-Hsing Yang;Sheng-Chang Wu;Shu-Chien Huang;Yih-Kai Lin
Affiliations:
Department of Computer Science, National Pingtung University of Education, Pingtung 900, Taiwan;Department of Computer Science, National Pingtung University of Education, Pingtung 900, Taiwan;Department of Computer Science, National Pingtung University of Education, Pingtung 900, Taiwan;Department of Computer Science, National Pingtung University of Education, Pingtung 900, Taiwan
Venue:
Journal of Systems and Software
Year:
2011

Citing 13
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Abstract

Data hiding, which embeds secret data into cover media, is one type of technology used to achieve the multimedia security. A reversible data hiding method has the characteristic that the cover media can be completely reconstructed after secret data are extracted. Recently, some reversible data hiding schemes have focused on the vector quantization (VQ)-compressed format. Using the modified fast correlation vector quantization (MFCVQ) concept, Lu et al. proposed a reversible data hiding scheme for VQ-index tables. In this paper, a new MFCVQ-based scheme is proposed. Specifically, our method will enlarge the embedding capacities by embedding multiple bits into a VQ index, thereby reducing the compressed bit rates by applying the Huffman-code concept and the 0-centered classification. Experimental results indicate that this method has greater pure embedding capacities and fewer compressed bit rates than that of previous MFCVQ-based methods.