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

[Xing He <xhe@umsis.miami.edu>]

7300bps is pretty impressive though.
That may also be the reason the watermark cannot survive any attack.

----- Original Message -----
From: "Mauricio Lopez" <miciolopez@hotmail.com>
To: <watermarking@watermarkingworld.org>
Sent: Thursday, November 11, 2004 3:47 PM
Subject: RE: [WM]: Re: Re: SS against D-A-D


>
> 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??


______________________________________________________________________________

Watermarking Mailing List - http://www.watermarkingworld.org/ml.html
To unsubscribe send email to "majordomo@watermarkingworld.org" with
"unsubscribe watermarking YOURMAIL" in the body.
______________________________________________________________________________