Double Embedding in the Quantization Index Modulation Framework

A. Sarkar and B. S. Manjunath
Department of Electrical and Computer Engineering,
University of California at Santa Barbara
Santa Barbara, CA 93106
{anindya,manj} [at]


In this paper, we perform double embedding in the quantization index modulation (QIM) framework where a single coefficient is modified twice, using two quantizers, to embed two bits. The motivation behind substituting single embedding with double embedding in the QIM framework for a certain steganographic scheme is to increase its hiding rate without significantly increasing the embedding distortion introduced and the stego scheme's detectability against steganalysis. We empirically determine the best way to couple the double embedding framework with our error correction framework that uses repeat accumulate (RA) coding. For moderate noise levels, the use of double embedding is seen to be significantly advantageous over single embedding.
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A. Sarkar and B. S. Manjunath,
International Conference on Image Processing, 2009, pp. 3653 - 3656, Cairo, Egypt, Nov. 2009.
Node ID: 525 , DB ID: 332 , Lab: VRL , Target: Conference
Subject: [Digital Watermarking and Data Hiding] « Look up more