Watermarking via zero assigned filter banks

Date
2009-07-17
Authors
Yücel, Z.
Özgüler, A. B.
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Signal Processing
Print ISSN
0165-1684
Electronic ISSN
Publisher
Elsevier
Volume
90
Issue
2
Pages
467 - 479
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
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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.

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Book Title
Keywords
Watermarking, Wavelets, Zero assignment
Citation
Published Version (Please cite this version)