Katana VentraIP

Compact Disc and DVD copy protection

CD/DVD copy protection is a blanket term for various methods of copy protection for CDs and DVDs. Such methods include DRM, CD-checks, Dummy Files, illegal tables of contents, over-sizing or over-burning the CD, physical errors and bad sectors. Many protection schemes rely on breaking compliance with CD and DVD standards, leading to playback problems on some devices.

Protection schemes rely on distinctive features that:

the sector number, the sector's relative and absolute logical position

an (EDC), which is an advanced checksum used to detect (if possible) read-errors

error detection code

an (ECC), an advanced method of detecting and correcting errors

error correction code

List of Compact Disc and DVD copy protection schemes

List of copy protection schemes

CDMediaWorld's CD protection page