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

["Mauricio Lopez" <miciolopez@hotmail.com>]

Dr. Singer,

The Watermark has a bit rate of 7300 bps, with a BPSK modulation centered at 7500 Hz.  maybe the band where the watermark its
located is too wide?


thanks
mlopez

>From: "yehuda-s" <yehuda.singer@be2k.co.il>
>Reply-To: "yehuda-s" <yehuda.singer@be2k.co.il>
>To: <watermarking@watermarkingworld.org>
>Subject: [WM]: Re: Re: SS against D-A-D
>Date: Thu, 11 Nov 2004 09:26:23 +0200
>
>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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