[Asterisk-Users] Can I recreate a Fax from a recorded file?

[Steve Underwood]

Colin Anderson wrote:

>>Why not capture the faxes (in or out) in tiff format, instead of audio
>>format?  Setup your asterisk box to relay faxes!
>>    
>>
>
>I think in this case the impact on the client would be much greater if you
>can show them a recreation of the image from the raw data; you could always
>claim that a TIFF file was altered (which it can be, trivially) but it's
>pretty much impossible to change the raw audio to your ends unless you are
>in a Tom Clancy novel. I'm watching this thread closely because where I work
>there's a lot of "he-said, she-said" over faxes too. If anyone can work out
>an example with SpanDSP, please share with the class! 
>  
>
I would have no problem decoding a FAX, doctoring the images, then 
creating modified audio from them. During decoding, the FAX modems 
produce a channel estimate, so reproducing the characteristics of the 
original audio path wouldn't be hard. I think it would be pretty easy to 
create fresh audio that no expert could dispute as possibly being the 
original.

Steve