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A data hiding scheme with flexible hiding capacity applied in vector quantization (VQ) index tables was proposed by Chang et al. However the minimum bit rate of their scheme is 0.552. To improve the bit rate of Chang et al's method, this paper proposes a novel and efficient reversible data embedding scheme for VQ index tables. The proposed method exploits characteristics of VQ indices and uses two...
In this paper, we propose an information hiding scheme to embed secret information into the compression code of an index table. First, the codewords neighboring the current processed index along with their closest codewords form a state codebook. Two indices of the state codebook are reserved as indicators. Once the current processed index satisfies some pre-defined conditions, the current processed...
This paper proposes a novel data embedding method for embedding secrets into VQ indices by using the Chinese Remainder Theorem (CRT). In the experimental results, the hiding capacity is flexible which corresponds to the pre-defined prime parameters. In addition, a reversible mechanism is imported into the scheme so the original VQ indices can be restored after extracting secrets retrieval.
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