Is embedded data removed by conversion process?

[doctordogalog]

I have read that some companies, such as Apple, have started embedding hidden "watermarks" within audio files, so that if anyone shares them, the original purchaser can be identified. My purely theoretical question is - if a watermarked file is converted from its original non-mp3 format to mp3, using dbPowerAmp dMC, is there any possibility that the hidden watermark would still be present and readable in the resulting mp3 file?

[Spoon]

Re: Is embedded data removed by conversion process?

Apples watermarks AFAIK are simply your account details in the ID Tag.

[doctordogalog]

Re: Is embedded data removed by conversion process?

OK - I'll bite the bullet and risk being more specific. I regularly purchase audiobooks from Audible. I convert them to mp3 format using dbPowerAmp, because I find mp3 much more convenient. I regularly lend these mp3 audiobooks to friends and family members. However, I'm getting a bit worried about what happens to them once they are out of my control. If one of my converted audiobooks gets posted to a newsgroup or torrent site, would anyone be able to tell that it was the file that I purchased?

[Spoon]

Re: Is embedded data removed by conversion process?

It is possible, although unlikely.

[daren]

Re: Is embedded data removed by conversion process?

It's certainly possible. Some watermarking systems can survive heavy data compression (low bitrates) and cascading (different file formats).

The only question is, are they introducing a watermark to their audiobooks at the time of purchase, which identifies the purchaser?

Best regards,
Daren.