|Method and device for data management in an optical recording medium
|Dec. 28, 1993/ May 25, 1990
|Terashima; Shigeo, Deguchi; Toshihisa, Kojima; Kunio, Maeda; Shigema
|Method of detecting and doing something useful in cases where the TOC is out of date with respect to the disc contents.
|A recording and reproducing device, which records and reproduces information on and from a rewritable recording medium having absolute addresses and including an information recording area wherein information entered from external devices is recorded and a Table of Contents area wherein additional address information with respect to the information recorded in the information recording area is recorded. The TOC area contains the absolute addresses of the recording positions of each information recorded in the information recording area. A display section graphically and independently displays the recorded and unrecorded ranges of the information recording area according to the absolute addresses recorded in the TOC area with respect to the recording positions of each piece of information. A warning device alerts the user that a position on the disc is occupied by referring TOC area when it is instructed to record new information in the position of the information recording area where another information has already been recorded.