Displaying 4 results from an estimated 4 matches for "stego".
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stegl
2006 Sep 19
2
Exc CB Search very little Question
...chose the 2nd, 3rd, ... best entry instead of the first.
Yes. I already introduced into the LSP prediction such an nbest list to
do that straightforward. My goal is to make sure if nothing is embedded,
the altered Speex version still needs to write exactly the same
coefficients as the original non-stego version.
For my scenario, I stick to NB encoding at 15kbps, so N is equal to 2.
So all I can do, in my opinion, is to check if the LSBs of
best_nind[0][i] and best_nind[1][i] (for each i in 0:nb_subvect) are
different. The Problem is, that I would like to know how big the error
is, which I introdu...
2006 Sep 19
0
Exc CB Search very little Question
...est entry instead of the first.
>
> Yes. I already introduced into the LSP prediction such an nbest list to
> do that straightforward. My goal is to make sure if nothing is embedded,
> the altered Speex version still needs to write exactly the same
> coefficients as the original non-stego version.
>
> For my scenario, I stick to NB encoding at 15kbps, so N is equal to 2.
> So all I can do, in my opinion, is to check if the LSBs of
> best_nind[0][i] and best_nind[1][i] (for each i in 0:nb_subvect) are
> different. The Problem is, that I would like to know how big the...
2006 Sep 19
2
Exc CB Search very little Question
Hi,
Jean-Marc Valin wrote:
> Well, you could change the order in the encoder as long as you reverse
> it in the decoder as well.
Ok, I see that in the split_cb_shape_sign_unquant function, that each
coefficient is tied to it's position in the nb_subvect exc coefficients.
Honestly, I have problems understanding what exactly the codebook search
works like. If you have the time to to
2006 Sep 20
2
Denoiser level and AEC problem
...chose the 2nd, 3rd, ... best entry instead of the first.
Yes. I already introduced into the LSP prediction such an nbest list to
do that straightforward. My goal is to make sure if nothing is embedded,
the altered Speex version still needs to write exactly the same
coefficients as the original non-stego version.
For my scenario, I stick to NB encoding at 15kbps, so N is equal to 2.
So all I can do, in my opinion, is to check if the LSBs of
best_nind[0][i] and best_nind[1][i] (for each i in 0:nb_subvect) are
different. The Problem is, that I would like to know how big the error
is, which I introdu...