[WM]: Re: Re: SS against D-A-D

["yehuda-s" <yehuda.singer@be2k.co.il>]

Dear all,
What is the frequency of the watermark?
Remember, that the watermark is a noise to the original signal.
Dr. Yehuda Singer
www.be2k.co.il


----- Original Message -----
From: "Xing He" <xhe@umsis.miami.edu>
To: <watermarking@watermarkingworld.org>
Sent: Wednesday, November 10, 2004 10:34 PM
Subject: [WM]: Re: SS against D-A-D


> 1. SS is not fragile against D-A-D
> 2. the sync may have problem
> 2. the watermark is too long
>
> Regards,
>
> Xing
> ----- Original Message -----
> From: "Mauricio Lopez" <miciolopez@hotmail.com>
> To: <watermarking@watermarkingworld.org>
> Sent: Tuesday, November 02, 2004 8:40 PM
> Subject: [WM]: SS against D-A-D
>
>
> > Recently, i have implemented the watermarking scheme developed by
Ricardo
> > A. Garcia  "Digital Watermarking of Audio Signals Using a Psychoacoustic
> > Auditory Model And Spread Spectrum Theory"  My watermark
> > length is 98304 points, at the moment a have not implemented a
> > syncrhonization method, but, instead i am using a pulse when i want
> > to know if the scheme is robust against MPEG compression.  I am also
using
> > a sin wave
> > (F=500,Fs=44100,n=(0:6655)) at the beguining of the sound signal to
> > synchronize the signal using correlation to know if the scheme
> > is robust against D-A-D
> > conversion.   The result is always the same: The watermark does not
resist
> > the media attack.
> >
> > Is it because the watermark is too long?? or SS watermarking is fragil
> > against D-A-D?? or is there any problem with the sync
> > method??


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