Information processing apparatus and method
a technology of information processing apparatus and control program, which is applied in the direction of unauthorized memory use protection, multi-programming arrangement, instruments, etc., can solve the problems of requiring a great deal of time for control program development, and the conventional information processing apparatus is not adapted to allow users to upgrade (rewrite) control programs. , to achieve the effect of easy upgrading of control programs
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[0166]Now, with reference to FIG. 1, an audio server practiced as one embodiment of the invention will be outlined below. An audio server 1 reads PCM (Pulse Code Modulation) data from a music CD 3, encodes the PCM data based on the ATRAC (Adaptive Transform Acoustic Coding) 3 technique, records the encoded data to a hard disk drive 58 (FIG. 6), and manages the recorded encoded data by relating them with hierarchical objects such as, from the higher layer, folder list, folder, album, and track.
[0167]The folder list can include a plurality of folders at a layer one step below. Each folder can include a plurality of albums at a layer one step below. Each album can include a plurality of tracks at a layer one step below. Each track located at the bottom layer of this hierarchical structure corresponds to the encoded data for one piece of music, one to one.
[0168]In what follows, encoded data are also referred to as content data. Each of the folder list, folders, albums, and tracks is als...
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