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Design of a New Audio Watermarking System Based on Human Auditory System  

Shin, Dong-Hwan ((주)마크텍 연구소)
Shin Seung-Won ((주)마크애니 연구소)
Kim, Jong-Weon ((주)마크애니 연구소)
Choi, Jong-Uk ((주)마크애니 연구소)
Kim, Duck-Young (부천대 전자과)
Kim, Sung-Hwan (서울시립대학교 전자전기컴퓨터공학부)
Publication Information
The Transactions of the Korean Institute of Electrical Engineers D / v.51, no.7, 2002 , pp. 308-316 More about this Journal
Abstract
In this paper, we propose a robust digital copyright-protection technique based on the concept of human auditory system. First, we propose a watermarking technique that accepts the various attacks such as, time scaling, pitch shift, add noise and a lot of lossy compression such as MP3, AAC WMA. Second, we implement audio PD(portable device) for copyright protection using proposed method. The proposed watermarking technique is developed using digital filtering technique. Being designed according to critical band of HAS(human auditory system), the digital filers embed watermark without nearly affecting audio quality. Before processing of digital filtering, wavelet transform decomposes the input audio signal into several signals that are composed of specific frequencies. Then, we embed watermark in the decomposed signal (0kHz~11kHz) by designed band-stop digital filer. Watermarking detection algorithm is implemented on audio PD(portable device). Proposed watermarking technology embeds 2bits information per 15 seconds. If PD detects watermark '11', which means illegal song. PD displays "Illegal Song" message on LCD, skips the song and plays the next song, The implemented detection algorithm in PD requires 19 MHz computational power, 7.9kBytes ROM and 10kBytes RAM. The suggested technique satisfies SDMI(secure digital music initiative) requirements of platform3 based on ARM9E core.
Keywords
Audio Watermarking; PD(Potable Device); HAS(Human Auditory System);
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