发明申请
US20090125310A1 APPARATUS AND METHOD FOR INSERTING/EXTRACTING CAPTURING RESISTANT AUDIO WATERMARK BASED ON DISCRETE WAVELET TRANSFORM, AUDIO RIGHTS PROTECTION SYSTEM USING THE SAME 审中-公开
基于离散小波变换插入/提取拍摄电阻水印的装置和方法,使用该音视频保护系统的音视频保护系统

APPARATUS AND METHOD FOR INSERTING/EXTRACTING CAPTURING RESISTANT AUDIO WATERMARK BASED ON DISCRETE WAVELET TRANSFORM, AUDIO RIGHTS PROTECTION SYSTEM USING THE SAME
摘要:
An apparatus and method for embedding and extracting a capturing-resistant audio watermark based on discrete wavelet transform, and a copyright management system using the same are provided. The apparatus for embedding a wavelet based audio watermark includes: a framing unit for dividing an input audio signal into small signals with a regular length; a discrete wavelet transform unit for calculating an mean value of wavelet coefficients by transforming the small signals based on a discrete wavelet transform; and an embedding unit for changing the calculated mean value according to a watermark where a synchronization signal is inserted and inserting the watermark into the audio signal.
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