Open AccessWavelet‐domain audio watermarking using optimal modification on low‐frequency amplitude
Author(s) -
Chen ShuoTsung,
Hsu ChihYu,
Huang HunagNan
Publication year - 2015
Publication title -
iet signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.384
H-Index - 42
ISSN - 1751-9683
DOI - 10.1049/iet-spr.2013.0399
Subject(s) - digital watermarking , wavelet , computer science , frequency domain , speech recognition , domain (mathematical analysis) , algorithm , artificial intelligence , mathematics , computer vision , image (mathematics) , mathematical analysis
On the basis of the Karush–Kuhn–Tucker (KKT) theorem, a novel digital audio watermarking scheme is proposed. To guarantee the robustness of a watermark, this scheme embeds information into low‐frequency coefficients of audio's discrete wavelet transform. For the modification of low‐frequency amplitude, this study uses the KKT theorem to minimise the difference between the original and the watermarked coefficients. Accordingly, embedding strength is increased to enhance the most robustness of a watermarked audio under sufficient embedding capacity and audio quality. In addition, the proposed watermarking scheme can extract the hidden data without the knowledge of original audio signal. Experimental results indicate that the performance of the proposed scheme is mostly better than other amplitude modification methods.