Dailydave: Re: Question of the day: iTunes + Watermarking?

[Saad Kadhi <saad () docisland org>]

On Jul 11, 2006, at 4:14 PM, Dave Aitel wrote:

> 2. Using a watermark that will survive mp3 [F1]
not mp3 but AAC in Apple's QuickTime container format with DRM (m4p).  
And as far as I know (which is not very far anyways), they are the  
only large music site that uses AAC. This paper [1] explains how you  
can embed strong watermarks even in the decompressed audio data.  
Excerpt:
        ---
        This paper discusses the embedding of robust watermarks
        directly into MPEG-2 AAC bit streams such that the watermark can be  
detected in
        the decompressed audio data.
        ---

And these slides [2] describes a two-dimensional watermarking scheme  
that leads 50-100% detection after AAC recompression.

Regards,
--
[1] http://www.iis.fraunhofer.de/amm/download/aes/dl.html? 
f=AES5101_Audio_Watermarking_of_MPEG-2_AAC_Bitstreams.pdf
        or http://tinyurl.com/fce4c
[2] http://www.research.ibm.com/trl/projects/RightsManagement/ 
datahiding/paper/Ryuki_EI04Slide.pdf
        or http://tinyurl.com/lfvxm
--
Saad Kadhi - http://saad.docisland.org/
"He who relieves the poor makes Ahura king"


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