Storage medium, reproducing method, and recording method

Abstract

According to one embodiment, a write-once type information storage medium comprises a recording layer which is formed by mixing a plurality of organic dye based recording materials whose molecular weights are different from each other, and wherein a mixture ratio of organic dye based recording materials whose molecular weight is small is larger than a mixture ratio of organic dye based recording materials whose molecular weight is large.

1 - 2 . (canceled) 
     
     
         3 . An information storage medium comprising:
 a data area configured to be able to store modulation data,   wherein   Non Return to Zero Inverting technique is utilized for the modulation data,   the modulation data has a minimum length which relates to the Non Return to Zero Inverting technique,   the modulation data is represented by a channel bit length T,   the minimum length corresponds to 2T, and   PRML system in which PR-class is defined as PR (1, 2, 2, 2, 1) is used for data reproduction.   
     
     
         4 . A reproducing method for the information storage medium according to  claim 3 , the method comprising:
 irradiating the information storage medium with light; and   reproducing the modulation data from the information storage medium.   
     
     
         5 . A reproducing apparatus for the information storage medium according to  claim 3 , the apparatus comprising:
 an optical head configured to irradiate the information storage medium with light; and   a reproducing module configured to reproduce the modulation data from the information storage medium.   
     
     
         6 . A recording method for the information storage medium according to  claim 3 , the method comprising:
 irradiating the information storage medium with light; and   recording the modulation data on the information storage medium.   
     
     
         7 . A recording apparatus for the information storage medium according to  claim 3 , the apparatus comprising:
 a recording module configured to irradiate the information storage medium with light and to record the modulation data on the information storage medium.