MANAGEMENT OF FILE DATA OF POSTSCRIPT TYPE OPTICAL DISK DEVICE

摘要

PROBLEM TO BE SOLVED: To restore easily even if recorded file data is deleted by making a needless file holder for managing needless file data in a postscript type optical disk, and recording reference information of specified file data in the needless file holder at the time of specifying an arbitrary recorded file data as needless one. ;SOLUTION: A dust box holder 10 managing needless file data in a postscript type optical disk is made in a control data section of a session at the time of writing additionally file data. When an arbitrary file data recorded in the postscript type optical disk is specified as needless one, reference information of the file data specified as needless one, a pass word, and hidden attributive information unable to refer at the time of reproduction are recorded in the dust box holder 10. Even if file data specified as needless one is deleted, since the reference information is recorded and managed, it can be easily restored by the pass word as necessary.;COPYRIGHT: (C)1999,JPO