Patent ID: 9697863
Date: 2017-07-04
CPC Classifications: G11B

Claim:
1. An information recording medium comprising: a first region in which type identification information for identifying a type of the information recording medium is recorded by recesses and/or protrusions which are formed by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device; and a second region in which content data is recorded by recesses and/or protrusions which are formed by the given modulation method and which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit, wherein the first region containing first address information recorded therein in a first address data format, the second region containing second address information recorded therein in a second address data format that differs from the first address data format, and the second address data format includes cluster addresses with a greater number of bits than a number of bits included in cluster addresses in the first address data format.