Linear and nonlinear oblivious data hiding

Litao Gang, Ali N. Akansu, Mahalingam Ramkumar

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The majority of the existing data hiding schemes are based on the direct-sequence (DS) modulation where a low-power random sequence is embedded into the original cover signal to represent hidden information. In this paper, we investigate linear and nonlinear modulation approaches in digital data hiding. One typical DS modulation algorithm is explored and its optimal oblivious detector is derived. The results expose its poor cover noise suppression as the hiding signature signal always has much lower energy than the cover signal. A simple nonlinear algorithm, called set partitioning, is proposed and its performance is analyzed. Analysis and simulation studies further demonstrate improvements over the existing schemes.

Original languageEnglish (US)
Pages (from-to)2102-2112
Number of pages11
JournalEurasip Journal on Applied Signal Processing
Issue number14
StatePublished - Dec 15 2004

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Hardware and Architecture
  • Electrical and Electronic Engineering


  • Data hiding
  • Data security
  • ML detection
  • Watermarking


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