Recording medium with optional information and apparatus and methods for forming, recording, reproducing and controlling reproduction of the recording medium

摘要

A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, which includes an identification information, which can identify whether optional information, such as copy protection information, is needed or not for the playback of contents stored on the recording medium, and to methods and apparatuses for forming, recording, and reproducing data on the recording medium.