Echo Watermarking in Sub-band Domain

  • Jae-Won Cho
  • Ha-Joong Park
  • Young Huh
  • Hyun-Yeol Chung
  • Ho-Youl Jung
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2939)


Echo hiding is a method for embedding information, called watermark, into an audio signal. In general, echo hiding is processed in the time domain by convolving audio signal with echo kernel, without any consideration of the frequency characteristics. In this paper, we propose an echo hiding technique, which inserts echo into sub-band signal so as to take account into the frequency characteristics. The proposed echo hiding enables to embed high-energy echo, while minimizing the host audio quality distortion. In addition, the proposed allows increasing watermark capacity, since it is possible to embed simultaneously some watermark bits into different sub-band signals. The simulation results show that the proposed is more effective than the conventional echo hiding, in terms of watermark capacity and robustness against various attacks.


Audio Signal Band Signal Host Signal Audio Watermark Watermark Signal 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2004

Authors and Affiliations

  • Jae-Won Cho
    • 1
  • Ha-Joong Park
    • 1
  • Young Huh
    • 2
  • Hyun-Yeol Chung
    • 1
  • Ho-Youl Jung
    • 1
  1. 1.Dept. of Info. and Comm. Eng.University of YeungnamKorea
  2. 2.Korea Electrotechnology Research InstituteKorea

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