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http://dx.doi.org/10.9717/kmms.2011.14.11.1431

Watermarking Algorithm using Power of Subbands Decomposed by Wavelet Packet and QIM  

Seo, Ye-Jin (울산대학교 컴퓨터정보통신공학과)
Cho, Sang-Jin (울산대학교 전기공학부)
Chong, Ui-Pil (울산대학교 전기공학부)
Publication Information
Journal of Korea Multimedia Society / v.14, no.11, 2011 , pp. 1431-1437 More about this Journal
Abstract
This paper proposes a novel watermarking algorithm that protects digital copyrights and is robust to attacks. Watermarks are embedded in the subband including the significant part of the signal such as a pitch. Generally, the subband containing the pitch has the biggest energy. In order to find this subband, wavelet packet transform is used to decompose the subbands and their energy are calculated. The signal of the selected subbands is transformed in frequency domain using FFT. The watermarks are embedded using QIM for samples higher than a certain threshold. The blind detection uses the Euclidean distance. The proposed method shows less than 5% BER in the audio watermark benchmarking.
Keywords
Watermark; Contents Protection; Wavelet Packet Transform; Energy; QIM(quantization index modulation); threshold;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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