Method and device for data management in optical recording medium

• US 5,432,768 A
• Filed: 06/22/1993
• Issued: 07/11/1995
• Est. Priority Date: 05/26/1989
• Status: Expired due to Term

• Current Assignee: Sharp Electronics Corporation (Hon Hai Precision Industry Co., Ltd.), Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Maeda, Shigemi, Terashima, Shigeo, Kojima, Kunio, Deguchi, Toshihisa
• Primary Examiner(s): Epps, Georgia Y.
• Assistant Examiner(s): HINDI, NABIL Z
• Application Number:
  US08/079,743
• Time in Patent Office: 749 Days
• Field of Search: 369/32, 369/58, 369/54, 369/48, 369/59, 369/69, 369/44.38, 369/44.39, 369/50
• US Class Current: 369/53.24
• CPC Class Codes: G11B 11/10502 characterised by the transducing operation to be executed
• CPC Class Codes: G11B 11/10595 Control of operating function
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/65 wherein solid state memory is used for storing indexing information or metadata
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/036 Insert-editing
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 27/34 Indicating arrangements indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D
• CPC Class Codes: G11B 27/36 Monitoring, i.e. supervising the progress of recording or reproducing for digital recording G11B20/00 and s.gr.; for monitoring, testing or measuring of TV recorders of the type covered by H04N5/76 and subgroups, see H04N17/06

Abstract

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.

Claims

1. A method for recording information on a recording medium in a recording and reproducing device, the recording medium having an information recording area, wherein the information is recorded, and a table of contents area that is located at a position different from the information recording area, said method comprising the steps of:

(a) recording information units, each having a desired data length, in the information recording area;

(b) recording content information, representing absolute addresses of the information recorded in the information recording area, immediately after execution of said step (a), the absolute addresses indicating the recording start position and recording end position of each information unit, in the table of contents area;

(c) determining if information in the information recording area has been completely erased;

(d) erasing content information from the table of contents area when it has been determined in said step (c) that information recorded in the information recording area has been completely erased;

(e) detecting a remaining amount of information when said step (c) determines that the information recording area is not completely erased;

(f) recording absolute addresses for the remaining information in the table of contents area, thereby replacing absolute addresses indicating recording positions for original information, when the remaining amount of information is not less than a predetermined value; and

(g) erasing associated content information from the table of contents area when the remaining amount of information is less than the predetermined value.