Open AccessAn Improved Detection Technique for Spread Spectrum Audio Watermarking with a Spectral Envelope Filter
Author(s) -
Jung Sarah,
Seok Jongwon,
Hong Jinwoo
Publication year - 2003
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.03.0203.0103
Subject(s) - digital watermarking , watermark , filter (signal processing) , computer science , spectral envelope , cover (algebra) , envelope (radar) , energy (signal processing) , spread spectrum , detector , artificial intelligence , algorithm , speech recognition , mathematics , computer vision , telecommunications , embedding , engineering , statistics , channel (broadcasting) , radar , mechanical engineering , image (mathematics)
We propose an improved algorithm for detecting audio watermarks based on a spread spectrum in the spectral domain. Since the energy of a watermark is much smaller than that of the cover audio data, pre‐processing to reduce the effect of the cover data is needed to reliably extract watermarks. We introduce a spectral envelope filter as a preprocess that enhances detecting performance by filtering out the intrinsic spectral character of cover data. The proposed watermarking structure can be easily included in the compression system and can extract watermarks from partially decompressed spectral data. Our experimental results demonstrate that with a bit error rate of around 10 dB against general attacks, the proposed detecting scheme works better than detectors without the spectral filter.