An optical disc on which a variety of types of video titles are recorded and which enables a reproduction apparatus to instantly distinguish whether emulated AV functions may be performed for any of the titles. The optical disc includes a manager area which stores playback type information corresponding...http://www.google.de/patents/US6336002?utm_source=gb-gplus-sharePatent US6336002 - Optical disc storing both video titles provided with AV functions and video titles with no such functions which can instantly distinguish between such kinds of titles, and a reproduction apparatus and reproduction method for such disc
