Disc recording medium having subsidiary data in which is stored an identifier

摘要

A disc-shaped recording medium and a reproducing apparatus for the disc-shaped recording medium in which the letter information, such as a title, pertinent to a program recorded on the disc-shaped recording medium, is recorded as subsidiary data in a management area or in a program area. In the subsidiary data, there is recorded an identified for specifying whether or not the subsidiary data is allowed to be duplicated on an other recording medium so that inhibition or permission of duplication of the subsidiary information may be controlled at the time of duplication of the program.