Patent ID: 8189992

Claim:
A reproduction apparatus for reproducing an optical disk recording medium recorded with N (N is an integer) pieces of data, data management information for managing each of the data, and total management information for managing the N pieces of data, comprising: wherein the total management information includes time zone information (TM_ZONE) indicating a time difference between a world standard time (Greenwich Mean Time) and a standard time in a predetermined location; wherein the data management information includes recording time zone information (REC_TM_ZONE) at a time of recording the data, indicating a time difference between the world standard time (Greenwich Mean Time) and a standard time in a location where the data has been recorded, and data recording time information (REC_TM) indicating a time when the data has been recorded, in accordance with the standard time indicated by the time zone information (TM_ZONE); and, wherein the reproduction apparatus includes means for specifying a local time in a location where the data recording time has been recorded, while the data is reproduced, in accordance with the data recording time information (REC_TM), the time zone information (TM_ZONE), and the recording time zone information (REC)_TM_ZONE) at the data recording time.