Advertisement

A Theoretical Framework for Watermarking of Compressed Signals

  • Séverine Baudry
  • Philippe Nguyen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5041)

Abstract

Nowadays, digital video, audio and multimedia signals are mostly transported, stored, exchanged, broadcast in compressed form. Thus, most of the multimedia processing operations, amongst them watermarking, shall be done in the compressed domain. When the bitrate is small, the quantization steps are coarse, and the inserted watermark may be heavily distorted or visible; moreover, watermark insertion may increase the stream rate, which is most of the time not acceptable. We propose to model the watermark insertion as an optimization problem on a discrete set, with visibility and rate constraints. We give an iterative method to get the optimal watermarked signal. We show by experimental results that this approach increases the robustness of the watermark.

Keywords

Stream watermarking compression quantization optimization bit-rate model 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Chen, B.: Design and analysis of digital watermarking, information embedding and data hiding systems. PhD thesis (June 2000)Google Scholar
  2. 2.
    Gondran, M., Minoux, M.: Graphes et Algorithmes. Eyrolles (1995)Google Scholar
  3. 3.
    Hartung, F., Girod, B.: Watermarking of uncompressed and compressed video. Signal Processing 66(3), 283–301 (1998)CrossRefzbMATHGoogle Scholar
  4. 4.
    He, Z., Mitra, S.: A linear source model and a unified rate control algorithm for dct video coding 12(11) (November 2002)Google Scholar
  5. 5.
    Kreher, D., Kocay, W.: Graphs, algorithms and optimization (2004)Google Scholar
  6. 6.
    Noorkami, M., Mersereau, R.: Compressed domain video watermarking for h264. In: Proc. of ICIP 2005, Genova (September 2005)Google Scholar
  7. 7.
    Vynne, T., Jordan, F.: Embedding a digital signature in a video sequence using motion vectors. In: CIP 1996 (submitted, 1996)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2008

Authors and Affiliations

  • Séverine Baudry
    • 1
  • Philippe Nguyen
    • 1
  1. 1.Thomson STS, Cesson SévignéFrance

Personalised recommendations