Data recording method, data deletion method, data display method, recording apparatus, recording medium, and program

Abstract

The objective of the present invention is to manage reference movies using an index file, without causing the user to be perplexed. the reference movies are generated because of, for instance, the upper limit of the file size. The index file manages sets of information regarding the files being managed. Examples of these sets of information are information for determining whether or not a file is presented to the user, information for determining whether or not a file is original, and information indicating whether or not nondestructive editing has been done. Based on such information, the erasure, displaying a list, and so on are carried out. Thus, it is possible to manage the reference movies using the index file, without causing the user to be perplexed.

1 . A data erasure method for erasing a set of data corresponding to an entry in a table from a storage medium, the table being stored in the storage medium and centrally managing sets of data at least including sets of divided data and control data referring to said sets of divided data, 
 the data erasure method comprising the step of:    (i) said set of data is erased, identifying whether or not said set of data corresponding to said registered entry is initially-recorded data.    
     
     
         2 . The data erasure method as defined in  claim 1 , wherein, the step (i) is carried out based on (I) information regarding whether or not said data managed by said registered entry has been divisional-recorded, (II) information regarding a relationship with data managed by another entry, and (III) a creation time of said set of data.  
     
     
         3 . A data recording method for recording a table, which centrally manages sets of data as respective entries, to a storage medium, 
 the data recording method being characterized in that, to each of said entries, information regarding whether or not a set of data managed by the entry is initially-recorded data is recorded.    
     
     
         4 . A data recording method for recording a table, which centrally manages sets of data as respective entries, to a storage medium, 
 the data recording method being characterized in that, to each of said entries, (a) information regarding a relationship with data managed by another entry and (b) information regarding whether or not presence of data managed by the entry is presented to a user are recorded.    
     
     
         5 . The data recording method as defined in either  claim 3  or  4 , wherein, said sets of data include at least sets of divided data and control data referring to said sets of divided data.  
     
     
         6 . The data recording method as defined in either  claim 3  or  4 , wherein, to each of said entries, information regarding a relationship with data managed by another entry is recorded.  
     
     
         7 . The data recording method as defined in either  claim 3  or  4 , wherein, the table is stored in a file.  
     
     
         8 . A data erasure method for erasing a set of data corresponding to an entry in a table from a storage medium, the table being stored in the storage medium and centrally managing, as respective entries, sets of data at least including sets of divided data and control data referring to said sets of divided data, 
 the data structure method being characterized in that, in the storage medium, information for identifying initially-recorded data is recorded to said entry corresponding to said set of data to be erased,    the data erasure method being characterized by comprising the step of:    when erasing said set of data, determining whether or not said set of data is erasable, based on information regarding whether or not said set of data to be erased is the initially-recorded data and information regarding a relationship with data managed by another entry.    
     
     
         9 . A data erasure method for erasing a set of data corresponding to an entry in a table from a storage medium, the table being stored in the storage medium and centrally managing sets of data as respective entries, 
 the data structure method being characterized in that, in the storage medium, (a) information regarding whether or not presence of said set of data is presented to a user and (b) information regarding a relationship with data managed by another entry are recorded to said entry corresponding to said set of data to be erased,    the data erasure method being characterized by comprising the step of:    when erasing said set of data, altering the information (a) in accordance with the information (b).    
     
     
         10 . A data display method for reading out a table from a storage medium and displaying the table, the table being stored in the storage medium and centrally managing sets of data as respective entries, 
 the data display method being characterized in that,    (A) information regarding whether or not presence of said set of data is presented to a user and (B) information regarding a relationship with data managed by another entry are as recorded to said entry managing said set of data, said entry being recorded in the storage medium, and in what way the table is displayed is determined in accordance with the information (A).    
     
     
         11 . A storage device for recording, to a storage medium, a table which centrally manages sets of data as respective entries, 
 the storage medium being characterized by comprising:    means for recording, to each of said entries, information regarding whether or not data managed by the entry is initially-recorded data.    
     
     
         12 . A storage device for recording, to a storage medium, a table which centrally manages sets of data as respective entries, 
 the storage medium being characterized by comprising:    means for recording, to each of said entries, (a) information regarding a relationship with data managed by another entry and (b) information regarding whether or not presence of data managed by the entry is presented to a user.    
     
     
         13 . A storage medium to which a table for centrally managing sets of data as respective entries is recorded, 
 the storage medium being characterized in that, in each of said entries, information regarding whether of not data managed by the entry is initially-recorded data is recorded.    
     
     
         14 . A storage medium to which a table for centrally managing sets of data as respective entries is recorded, 
 the storage medium being characterized in that, to each of said entries, (a) information regarding a relationship with data managed by another entry and (b) information regarding whether or not presence of data managed by the entry is presented to a user are recorded.    
     
     
         15 . A program for causing a computer to implement the data erasure method defined in any one of claims  1 ,  2 ,  8 , and  9 .  
     
     
         16 . A computer-readable storage medium which stores the program defined in  claim 15 .  
     
     
         17 . A program for causing a computer to implement the data recording method defined in either  claim 3  or  4 .