Patent ID: 8553511
Filing Date: 2013-10-08
Classification: G11B,H03M

Abstract:
1. A disk recording medium comprising: a recording and reproduction region into and from which first data can be recorded and reproduced in accordance with a rewritable or write-once-read-many recording method, the first data coded in accordance with a first error correction code, and from which second data recorded in the form of wobbling of a groove can be reproduced, wherein the second data includes additional information and dummy data, and the additional information is coded in accordance with the first error correction method, and the coded additional information with the added dummy data are recorded in a state coded in accordance with a second error correction method, and wherein the additional information with the added dummy data is error correction coded such that, to the additional information of a unit of m smaller than a code length n in error correction coding of the first data, m-n of the dummy data are added so as to have a code length equal to n.