Disk recording and reproducing device

• US 5,420,838 A
• Filed: 03/03/1993
• Issued: 05/30/1995
• Est. Priority Date: 06/30/1989
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Maeda, Shigemi, Ishikawa, Toshio, Terashima, Shigeo, Deguchi, Toshihisa
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US08/025,801
• Time in Patent Office: 818 Days
• Field of Search: 369/32, 369/44.32, 369/44.33, 369/48, 369/53, 369/54, 360/69
• US Class Current: 369/30.09
• CPC Class Codes: G11B 11/10502 characterised by the transducing operation to be executed
• CPC Class Codes: G11B 11/10556 with provision for moving or switching or masking the transducers in or out of their operative position
• 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 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00137 involving measures which result in a restriction to contents recorded on or reproduced from a record carrier to authorised users
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/1251 for continuous data, e.g. digitised analog information signals, pulse code modulated [PCM] data
• CPC Class Codes: G11B 20/1883 Methods for assignment of alternate areas for defective areas
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/2545 CDs
• 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 27/038 Cross-faders therefor
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/11 : by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/3027 : used signal is digitally coded
• 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
• CPC Class Codes: G11B 7/0037 : with discs

Abstract

A disk recording and reproducing device records and reproduces information on and from a magneto-optical disk having 3 3 and there is TOC (Table of Contents) area. Additional information with respect to each piece of the information recorded in the information recording area is recorded in the TOC. The device includes operation keys, a TOC memory for storing read/write control information for desired pieces of information entered through the operation keys. There is an optical head and a magnetic coil for recording, in the TOC area, the contents stored in the TOC memory as additional information. A controller controls the read/write operation to the disk according to the read/write control information. With the arrangement, a user can recognize necessary/unnecessary information and defective parts in the disk, and therefore make effective use thereof as well as maintaining secrecy of the information.

Claims

1. A disk recording and reproducing device for recording and reproducing information on and from a re-writable recording disk having absolute addresses, an information recording area where information entered from external devices is recorded and a TOC area wherein additional information with respect to each piece of the information recorded in the information recording area is recorded, comprising:

operation keys which are operable by a user for entering defective part information in the TOC area;

memory means for storing therein the defective part information indicating recording/reproduction unavailable parts in the information recording area;

recording means for recording the defective part information stored in the memory means in the TOC area; and

control means for controlling read/write operations according to the defective part information.

2. A disk recording and reproducing device as set forth in claim 1, wherein there is read/write control information that includes write protection information for entering through the operation keys with respect to desired pieces of recorded information, and the control means is a controller for restraining writing operation in a write protection range which is an area .in the disk wherein writing operation is inhibited.

3. A disk recording and reproducing device as set forth in claim 2, wherein the write protection information is a piece of information providing means for inhibiting the writing operation in the information recording area, wherein the recorded information is located.

4. A disk recording and reproducing device as set forth in claim 2, wherein the write protection information is a piece of information providing means for inhibiting the writing operation in an area wherein the recorded information is located, which location is an area located between a first piece of information and a succeeding piece of information.

5. A disk recording and reproducing device as set forth in claim 2, wherein there is additional information for entering that includes a program number, a recording start position, a recording end position or a length from the recording start position to the recording end position, and the write protection information.

6. A disk recording and reproducing device as set forth in claim 2 further comprises a fader circuit for applying fade-out processing to a specific piece of information slightly before the end of a non-write-protection range when the specific piece of information is written in the non-write-protection range.

7. A disk recording and reproducing device as set forth in claim 1, wherein there is read/write control information for entering that includes read protection information with respect to specific recorded information and a pass word for releasing the read protection information,

the read protection information and the pass word being entered through the operation keys.

8. A disk recording and reproducing device as set forth in claim 7, wherein the read protection information is a piece of information for inhibiting a reading operation of the relevant recorded information from the information recording area.

9. A disk recording and reproducing device as set forth in claim 8, wherein there is additional information that includes a program number, a recording start position, a recording end position, or a length from the recording start position to the recording end position, and the read protection information of each piece of the information and the pass word.

10. A disk recording and reproducing device as set forth in claim 7, wherein the control means is a controller for controlling the device when a pass word entered through the operation keys is compared with a pass word already recorded and if those pass words do not agree with each other, to inhibit reading operation of specific recorded information.

11. A disk recording and reproducing device as set forth in claim 7, wherein the control means is a controller for controlling the device when a pass word entered through the operation keys is compared with a pass word already recorded and if those pass words do not agree with each other, to inhibit reading operation of relevant recorded information, and to automatically apply write protection to a range wherein the relevant recorded information is located when a pass word entered through the operation keys is compared with a pass word already recorded and if those pass words do not agree with each other.

12. A disk recording and reproducing device as set forth in claim 7, wherein the control means is a controller for controlling the device when a pass word entered through the operation keys is compared with a pass word already recorded and if those pass words do not agree with each other, to lower the quality of read signals in reading operation of relevant recorded information.

13. A disk recording and reproducing device as set forth in claim 3, or claim 7, wherein the information includes data for use in computers.

14. A disk recording and reproducing device as set forth in claim 1, wherein the memory means is a TOC memory, so that a reading or writing operation can be performed freely therefrom.

15. The disk recording and reproducing device according to claim 1 further comprising:

means for successively displaying information indicative of a corresponding position on a recording medium during recording/reproducing operation and for displaying information regarding a position on the recording medium as defective part information.

16. The disk recording and reproducing device according to claim 15, wherein the means for displaying includes means for displaying the defective part information that is stored in said memory means.

17. The disk recording and reproducing device according to claim 16, wherein the means for displaying includes means for displaying bright and dark areas including bars corresponding to defective ranges and used ranges, so that a user can recognize writable areas clearly and promptly.

18. A disk recording and reproducing device as set forth in claim 1, wherein the information includes pieces of music information.

19. A disk recording and reproducing device as set forth in claim 1, wherein the recording means may be an optical head for applying a light beam to the disk and a magnetic coil for applying a magnetic field to the disk.

20. A disk recording and reproducing device for recording and reproducing information on and from a re-writable recording disk having absolute addresses, an information recording area where information entered from external devices is recorded and a TOC area wherein additional information with respect to each piece of the information recorded in the information recording area is recorded, comprising:

operation keys which are operable by a user for entering defective part information;

memory means for storing therein defective part information entered by the operation keys indicating recording/reproduction unavailable parts in the information recording area;

recording means for recording the defective part information stored in the memory means in the TOC area; and

control means for controlling read/write operations according to the defective part information.