[LAU] Looking for Audio Watermarking Advice & Tools

[Lorenzo Sutton]

Kevin,

On 23/10/2011 17:13, Kevin Cosgrove wrote:
>
> The subject line says it all.  I'm looking for a Linux solution to
> watermarking audio.  Thanks....

I wonder if anyone ever thought of/done (something like) this:

- Paint something with your favourite graphics editor, export to bitmap
- Use a tool like ARSS [1] to resynthesise the bitmap only in a 
near-to-inaudible fequency range (say 16000 ~ 22000 Hz)
- mix it with the original audio (so that the audio watermark is very 
low but strong enough to be visible in a spectrogram)

Of course, to work this assumes the original audio does not contain much 
material in that very range where you are placing the audio watermark. 
And of course this could possibly be filtered out. And I don't think it 
would be machine-readable (or maybe yes, with some super-funky fft 
analysis).

I also wonder what would be the audio impact on the original sound (I 
think much dependent on the contents of source and watermark audio).

Not that I would necessarily endorse this.

Lorenzo.

[1] http://arss.sourceforge.net/

>
> --
> Kevin
>
>
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>