Joint coding and embedding techniques for multimedia images

  • Authors:
  • Chin-Chen Chang;Wen-Chuan Wu;Yi-Hui Chen

  • Affiliations:
  • Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan, ROC and Department of Information Engineering and Computer Science, Feng Chia Unive ...;Department of Computer and Information Science, Aletheia University, Taipei 251, Taiwan, ROC;Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi 621, Taiwan, ROC

  • Venue:
  • Information Sciences: an International Journal
  • Year:
  • 2008

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Abstract

Hiding data in digital images is a technique for secret data communication. It involves embedding important data into a cover image in digital form with minimal perceptible degradation. In this paper, we first propose an improved data hiding method for side-match vector quantization (SMVQ) compressed images, which utilizes the codeword-pairing procedure to modulate the index code of each image block. In order to take it a step further and obtain a larger embedding capacity, we remodel the first proposed method into a new one with the power of variable-rate data embedding through the use of a multiple-base notational system. According to the experimental results, the two proposed methods are indeed capable of providing a larger embedding capacity without causing noticeable distortions of stego-images in comparison with previous methods. Moreover, our methods also maintain a low compression bit-rate without auxiliary data.