DEVICE FOR JUDGING A TYPE OF AN OPTICAL INFORMATION STORAGE MEDIUM, A METHOD THEREFOR AND THE OPTICAL INFORMATION STORAGE MEDIUM, ESPECIALLY WITH REGARDS TO CLEARLY AND EASILY DISTINGUISHING THE SAME SIZE OF OPTICAL INFORMATION STORAGE MEDIA INTO TWO KINDS OF OPTICAL INFORMATION STORAGE MEDIA

摘要

PURPOSE: A device for deciding a type of an optical information storage medium, a method therefor and the optical information storage medium are provided to differentiate an incremental direction of physical addresses of optical information storage media, thereby clearly and easily distinguishing the optical information storage media having the same size into two types of media. CONSTITUTION: An optical head reads physical address data recorded in a predetermined section of an optical information storage medium(510). The first CODEC receives the read address data from the optical head to demodulate the data, and outputs address information(530). A controller determines an incremental direction of a physical address of the optical information storage medium according to the address information(550). The controller decides a type of the optical information storage medium(570).