The erasion level appending range of a file is instructed. According to this instruction, the erasion level is set. When this setting range does not agree with the cell unit of the current cell, the current cell is divided to set a sequence of divided cells. Playback management information of each of the divided cells and current cell is re-created, and erasion level information is appended to playback management information of the divided cell that belongs to the appending range.
CROSS REFERENCE TO RELATED APPLICATION
This Application is a Divisional of application Ser. No. 10/417,214, filed on Apr. 17, 2003, which is a Divisional of application Ser. No. 09/623,460, filed on Sep. 12, 2000, now granted as U.S. Pat. No. 6,580,872, which is the National Stage of International Application No. PCT/JP99/03668, filed on Jul. 7, 1999. This Application is based upon and claims the benefit of priority from the prior Patent Application No. 10-192064, filed in Japan on Jul. 7, 1998, the entire contents of all of which are incorporated herein by reference.
