ITPEC IP April 2019 Question 24
Which of the following is the copyright protection technology that is used for a DVD-R and an SD card, and allows digital content to be duplicated to recording media only once?
Explanation
CPRM — the copy-protection technology for recordable media such as DVD-R and SD cards that allows copying only once.
CPRM (Content Protection for Recordable Media) encrypts content with a key tied to the ID of the individual medium. The recording can be played only from that medium, and "copy once" content such as digital broadcasts can be recorded once but not duplicated further.
Answer (b)
Why not others:
- •(a) AR — Augmented Reality overlays computer-generated information on a view of the real world
- •(c) HDMI — a digital interface carrying video and audio between devices, not a copy-control scheme for recording media
- •(d) MIDI — a standard for exchanging musical performance data between electronic instruments and computers
Key rule: CPRM limits copying of content on recordable media; distinguish it from interfaces (HDMI), data formats (MIDI) and display technologies (AR).
Multimedia · AI-written, may contain errors
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