Patent ID: 7653866
Filing Date: 2010-01-26
Classification: G11B,H03M

Abstract:
1. A recording medium comprising an area in which a data stream containing first error correcting codes obtained by encoding first information, second error correcting codes obtained by encoding second information, and synchronization signals are stored, wherein: the first error correcting codes have a first correction capability; the second error correcting codes have a second correction capability higher than the first correction capability; in the data stream, the first error correcting codes are alternately interleaved with the second error correcting codes and the synchronization signals; wherein in relation to correction capability of the first and second error correcting codes, d≧2·t+1 is established where “d” represents the minimum distance between each code and “t” represents the possible number of corrections, and d≧2·t+e+1 is established where “e” represents the number of erasure corrections.