Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1989-03-13
1992-04-21
Richardson, Robert L.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 58, 360 48, G11B 700
Patent
active
051074818
ABSTRACT:
Areas in an optical disk are classified into three categories including file areas, used areas, and erased areas for management purposes. An erasing process to convert a used area into an erased area is executed asynchronously with a writing process, thereby preventing any decrease in data transfer speed due to the effect of the erasing process upon the writing process. On the other hand, the file areas, used areas and erased areas are managed as continuous areas which are designated by the head position and the size or end position of the area. A file is preferentially assigned from an erased area or a used area of a large size. With such a construction, area management, such as an integration of the erased area or the like, can be easily performed. Also, the file can be assigned to the continuous areas, and the access speed can be improved.
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Kozuka Masayuki
Miki Tadashi
Matsushita Electric - Industrial Co., Ltd.
Richardson Robert L.
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