MY119491A - Method for recording/reproducing data, data reproducing device, and recording medium - Google Patents

Abstract

WHEN DATA IS RECORDED ON A RECORDING MEDIUM SUCH AS AN OPTICAL DISK AND REPRODUCED, IF BURST ERROR OCCURS, THE PROCESSING CAN BE CARRIED OUT WITHOUT LESSENING A DATA RECORDING CAPACITY. WHEN DATA IS RECORDED, A FIRST ERROR-CORRECTING CODE (EI; I = 1.. .N.. .N) IS GENERATED WITH RESPECT TO A SERIES OF DATA OF A PREDETERMINED AMOUNT. THE FIRST ERROR-CORRECTING CODE (EI; I = 1.. .N.. .N) ADDED TO DATA OF THE PREDETERMINED AMOUNT FROM WHICH THE FIRST ERROR-CORRECTING CODE (EI; I = 1.. .N...N) IS GENERATED. A SECOND ERROR-CORRECTING CODE (PI, QI) IS GENERATED WITH RESPECT TO A SERIES OF DATA OF THE PREDETERMINED AMOUNT. THE SECOND ERROR-CORRECTING CODE (PI, QI) IS ADDED TO DATA OTHER THAN DATA OF THE PREDETERMINED AMOUNT FROM WHICH THE SECOND ERROR-CORRECTING CODE (PI, QI) IS GENERATED AND THEN RECORDED ON A RECORDING MEDIUM. UPON REPRODUCTION, DATA OF A CERTAIN RECORDING UNIT IS REPRODUCED FROM A RECORDING MEDIUM ON WHICH DATA OF RESPECTIVE RECORDING UNITS ARE RECORDED. IT IS DETERMINED ON THE BASIS OF THE FIRST ERROR-CORRECTING CODE (EI; I = 1.. .N.. .N) CONTAINED IS REPRODUCED DATA OF RECORDING UNITS WHETHER ERRORS CAN BE DETECTED AND CORRECTED. IF THE ERRORS CAN BE DETECTED AND CORRECTED, THEN THE ERRORS CAN BE DETECTED AND CORRECTED. IF THE ERRORS CANNOT BE DETECTED AND CORRECTED, THEN ERASURE INFORMATION IS GENERATED ON THE BASIS OF THE SECOND ERROR-CORRECTING CODE (PI, QI) CORRESPONDING TO THE DATA OF A CERTAIN RECORDING UNIT REPRODUCED FROM THE RECORDING UNIT WHICH CONTAINS THE SECOND ERROR-CORRECTING CODE (PI, QI) CONCERNING THE DATA OF A CERTAIN RECORDING UNIT AND THE DATA OF A CERTAIN RECORDING UNIT IS ERASED AND CORRECTED BY USE OF THE ENSURE INFORMATION AND THE FIRST ERROR-CORRECTING CODE (EI; I = 1.. .N) (FIG.1)