Ano, waterrmark je aj na DVD-A, ale ten je zakodovany v audiu a nie fyzicky na disku.
Takze pri DVD-A je mozne urobit spravnym postupom dekryptovania, ripovania a napalenia kopiu, ktora bude watermark tiez obsahovat. Aj ripnute DVD-A ISO moze obsahovat zakodovany watermark, da sa to zistit pomocou DVD-A pluginu pre foobar, ktory v stavovom riadku hlasi, ked je audio s watermarkom...
Nejake info
https://forums.afterdawn.com/threads/dv ... ks.682575/wikipedia:
Copy protection
DVD-Audio discs may optionally employ a copy protection mechanism called Content Protection for Prerecorded Media (CPPM).[5] CPPM, managed by the 4C Entity, prevents users from extracting audio to computers and portable media players.
Because DVD-Video’s content-scrambling system (CSS) was quickly broken, DVD-Audio’s developers thought a better method of blocking unauthorized duplications. They developed CPPM, which uses a media key block (MKB) to authenticate DVD-Audio players. In order to decrypt the audio, players must obtain a media key from the MKB, which also is encrypted. The player must use its own unique key to decrypt the MKB. If a DVD-Audio player’s decryption key is compromised, that key can be rendered useless for decrypting future DVD-Audio discs. DVD-Audio discs can also utilize digital watermarking technology developed by the Verance Corporation, typically embedded into the audio once every thirty seconds. If a DVD-Audio player encounters a watermark on a disc without a valid MKB, it will halt playback.[6]
The 4C Entity also developed a similar specification, Content Protection for Recordable Media (CPRM), which is used on Secure Digital cards.
DVD-Audio’s copy protection was overcome in 2005[6] by tools which allow data to be decrypted or converted to 6 channel .WAV files without going through lossy digital-to-analogue conversion. Previously that conversion had required expensive equipment to retain all 6 channels of audio rather than having it downmixed to stereo. In the digital method, the decryption is done by a commercial software player which has been patched to allow access to the unprotected audio. As the DVD-A format has not gained wide commercial interest or acceptance, decryption tools are still very primitive.