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Reversible data hiding for VQ-compressed images based on search-order coding and state-codebook mapping

机译:基于搜索顺序编码和状态码本映射的VQ压缩图像的可逆数据隐藏

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摘要

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.
机译:在数字多媒体领域,许多研究人员已经利用数据隐藏来提供安全的通信。由于大多数多媒体都是预先压缩以节省存储空间和传输时间,因此本文提出了一种用于矢量量化(VQ)压缩图像的可逆数据隐藏方案。在提出的方案中,首先采用搜索顺序编码(SOC)来减小VQ索引表的大小。对于无法通过SOC处理的图像块,使用一种称为状态码本映射(SCM)的技术将这些块映射到其状态码本中的相应索引,这些索引是由一组邻域索引生成的。经过SOC和SCM之后,输出代码流的大小减小了,并且大量空间可用于嵌入敏感数据。提出了与类似近期研究的性能比较,以证明所提出方案的优越性。实验结果表明,该方案可以实现较高的嵌入容量和较高的压缩比特率。 (C)2014 Elsevier Inc.保留所有权利。

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