平成27年度秋期 ITパスポート試験問46

This question's explanation and your answers so far.

問46

頻出度★☆☆

ディジタルコンテンツで使用されるDRM (Digital Rights Management) の説明として, 適切なものはどれか。

出典　平成27年度秋期 ITパスポート試験問46

解説

問 46

Incorrectア
“Compression methods for video and audio data” describes codecs (encoding methods) such as MPEG and H.264, which are technologies for reducing data size. This is a different thing from DRM, whose purpose is copyright protection, so it is wrong.
イ
正解 DRM (Digital Rights Management) is a general term for technologies that protect the copyright of digital content such as music, video, and e-books, and that restrict and manage its use and copying. Specifically, it combines encryption, license authentication, limits on the number of copies, and expiration settings so that only properly authorized users can play and use the content. Choice “イ”, “a general term for technologies that protect the copyright of content and restrict its use and copying”, exactly matches this description, so “イ” is correct.
Incorrectウ
“An XML-based markup language for controlling data broadcasting on digital television” describes BML (Broadcast Markup Language). It is a language for describing data-broadcast screens and is unrelated to DRM, which is a copyright management technology, so it is wrong.
Incorrectエ
“A standard for reproducing realistic, immersive sound effects” describes surround sound (e.g., Dolby Digital). It is a standard for sound reproduction, and its purpose differs from that of DRM, which protects copyright, so it is wrong.

ここがポイント

Remember that DRM is a general term for technologies that protect the copyright of digital content through encryption, license authentication, and so on, and that restrict its use and copying.
Do not confuse DRM with easily confused technologies such as codecs (compression methods), BML (a data-broadcast markup language), and surround-sound standards.

用語

解答問46イ