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      • Department of Electrical and Electronics Engineering
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      Watermarking via zero assigned filter banks

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      Author
      Yücel, Z.
      Özgüler, A. B.
      Date
      2009-07-17
      Source Title
      Signal Processing
      Print ISSN
      0165-1684
      Publisher
      Elsevier
      Volume
      90
      Issue
      2
      Pages
      467 - 479
      Language
      English
      Type
      Article
      Item Usage Stats
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      Abstract
      In order to identify the owner and distributor of digital data, a watermarking scheme in frequency domain for multimedia files is proposed. The scheme satisfies the imperceptibility and persistence requirements and it is robust against additive noise. It consists of a few stages of wavelet decomposition of several subblocks of the original signal using special zero assigned filter banks. By assigning zeros to filters on the high frequency portion of the spectrum, filter banks with frequency selective response are obtained. The information is then inserted in the wavelet-decomposed and compressed signal. Several robustness tests are performed on male voice, female voice, and music files, color and gray level images. The algorithm is tested under white Gaussian noise and against JPEG compression and it is observed to be robust even when exposed to high levels of corruption.
      Keywords
      Watermarking
      Wavelets
      Zero assignment
      Permalink
      http://hdl.handle.net/11693/22450
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.sigpro.2009.07.012
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      • Department of Electrical and Electronics Engineering 3613
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