Patent ID: 8370692
Filing Date: 2013-02-05
Classification: G11B

Abstract:
1. An information storage medium comprising two or more recording layers on which data is recorded on and/or reproduced from by using a same recording and/or reproducing optical system for each of the two or more recording layers, wherein error correction code (ECC) blocks are recorded onto the two or more recording layers by using two or more data formats used to store user data, wherein the two or more data formats comprises a first data format and a second data format, and a proportion of additional information in relation to user data in the first format is different from the proportion of additional information in relation to user data in the second format, the additional information being information which is used to record and/or reproduce the user data wherein an optical beam which is used in reproducing the first data format is the same as an optical beam which is used in reproducing the second data format.