Obtaining Higher Rates for Steganographic Schemes while Maintaining the Same Detectability
Abstract
This paper focuses on modifying the decoder module for an
active steganographic scheme to increase the effective data-rate with-
out affecting the embedding module. Three techniques are suggested to
improve the error correction framework, an essential component of an
active steganographic scheme. The rst involves puncturing where the
code-length is increased by adding a suitable number of additional era-
sures. The second technique involves channel modeling and soft-decision
decoding which is adaptive to the individual embeddable image coeficient. The third method adjusts the erasure threshold depending on the design hiding quantizer so as to achieve a higher data-rate. Combin-
ing these techniques, the effective data-rate is increased by 10%-50% for
Yet Another Steganographic Scheme (YASS), a popular active stegano-
graphic scheme.
Information Hiding Workshop 2010, Calgary, Canada, Jun. 2010.
Node ID: 552 ,
DB ID: 361 ,
Lab: VRL ,
Target: Workshop
Subject: [Digital Watermarking and Data Hiding] « Look up more