Recording surface of an optical disk is segmented radially into a plurality of volumes each including a lead-in area, program area and lead-out area. In each of the volumes, information indicating presence of a succeeding volume is recorded in a main channel of the program or lead-out area. Dedicated...http://www.google.de/patents/US6243343?utm_source=gb-gplus-sharePatent US6243343 - Optical disk, optical disk reproducing device and optical disk reproduction system
