Patent ID: 6633526
Filing Date: 2003-10-14
Classification: G11B

Abstract:
A data recording method for recording data to be recorded as an optically readable image on a recording medium by making â€œ1'sâ€  and â€œ0'sâ€  included in the data correspond to existence and non-existence of fine dots having predetermined reflection characteristics, respectively, and by two-dimensionally arranging the dots according to the data in a predetermined format, said data recording method comprising:inputting the data to be recorded; and performing a two-dimensional precode processing on the input data, when dots according to the input data are optically readably recorded such that the data is allowed to be reproduced by utilizing an optical two-dimensional interference from adjacent ones of the dots, wherein the two-dimensional precode processing corresponds to an arrangement of the dots, and prevents a two-dimensional error propagation from occurring when the data is reproduced by utilizing the optical two-dimensional interference, and wherein the two-dimensional precode processing includes processing for performing an exclusive-OR operation between the input data and data regarding dots adjacent to the dots according to the input data, and the data regarding the dots is already subjected to the two-dimensional precode processing.