Playback apparatus for an information storage medium

摘要

An information storage medium (1) is provided which includes main image information (400) compliant with a high-image-quality system, first subsidiary image information (401a) compliant with the high-image-quality system, and second subsidiary image information (401b) compliant with a standard system. The stored information (400,401a,401b) is read from the information storage medium (1), the main image information (400) is down-converted into image information of the standard system, and the second subsidiary image information (401b) is superposed on the image information. <IMAGE>