Obtaining higher rates for steganographic schemes while maintaining the same detectability

Authors:
Anindya Sarkar;Kaushal Solanki;B. S. Manjunath
Affiliations:
Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA;Mayachitra Inc., Santa Barbara, CA;Department of Electrical and Computer Engineering, University of California, Santa Barbara, CA
Venue:
IH'10 Proceedings of the 12th international conference on Information hiding
Year:
2010

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Abstract

This paper focuses on modifying the decoder module for an active steganographic scheme to increase the effective data-rate without affecting the embedding module. Three techniques are suggested to improve the error correction framework of an active steganographic scheme. The first involves puncturing where the code-length is increased by adding a suitable number of additional erasures. The second technique involves channel modeling and soft-decision decoding which is adaptive to the embeddable image coefficient. The third method adjusts the erasure threshold depending on the design hiding quantizer so as to achieve a higher data-rate. Combining these techniques, the effective data-rate is increased by 10%-50% for Yet Another Steganographic Scheme (YASS), a popular active steganographic scheme.