Apparatus for releasing a restriction on the recording of an information signal on a recording medium

• US 4,965,680 A
• Filed: 06/30/1988
• Issued: 10/23/1990
• Est. Priority Date: 06/30/1987
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Endoh, Kenjiro
• Primary Examiner(s): Canney, Vincent P.
• Application Number:
  US07/214,129
• Time in Patent Office: 845 Days
• Field of Search: 360/60, 369/14, 369/48, 380/4
• US Class Current: 360/60
• 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 20/00724 wherein a prepaid credit balance is registered on the recording medium
• CPC Class Codes: G11B 20/10 Digital recording or reproducing

Abstract

A recording/reproducing system according to this invention for use in, for example, a digital audio tape recorder is applied to a type in which recording of an input information signal on a recording medium is restricted, and can ensure releasing of the recording restriction by using release-signal-holding mediums on which a release signal for releasing the recording restriction is recorded. In this case, the release signal is affixed with frequency data for restricting the quantity of the information signal to be recorded on recording medium, and this frequency data is updated in such a way that the greater the number of recording the information signal on recording medium, the smaller the recordable quantity of the information signal.

Claims

1. An apparatus for releasing a restriction on the recording of an information signal on a recording medium, comprising:

a first recording medium which allows the information signal to be recorded;

a recording device for recording said information signal on said first recording medium;

restriction means for restricting the recording of said information signal by the recording device on said first recording medium;

a release-signal-holding medium composed of a second recording medium for allowing the recording and reproduction of a release signal for releasing the recording restriction of said restriction means, said release signal including frequency data for restricting a quantity of said information signal which may be recorded on said first recording medium when the recording restriction of said restriction means has been released; and

releasing means for releasing the recording restriction placed by the restricting means based on said release signal of said release-signal-holding medium.

2. The recording control apparatus according to claim 1, wherein a recording restriction signal is affixed to said information signal;

and

said restriction means includes detection means for detecting said recording restriction signal in said information signal to restrict the recording of said information signal on said first recording medium by said recording device.

3. The recording control apparatus according to claim 2, wherein said releasing means includes:

readout means for reading said release signal from said second recording medium;

storage means for storing said release signal read out from said second recording medium by said readout means;

invalidation means for invalidating said release signal recorded on said second recording medium, said release signal being stored in said storage means;

recording restriction releasing means for releasing a recording restriction of said restriction means, when said release signal being invalidated by said invalidation means; and

recording means for recording on said second recording medium, said release signal updated by said updating means, when a recording stop request is weele while said information signal is being recorded on said first recording medium in accordance with an operation of said recording restriction releasing means.

4. The recording control apparatus according to claim 3, wherein said invalidation means changes the frequency data to "0", thereby invalidating the release signal.

5. The recording control apparatus according to claim 3, wherein said invalidation means sets an invalidation flag, thereby invalidating the release signal.

6. The recording control apparatus according to claim 2, wherein said recording restriction signal affixed to said information signal includes specific data for specifying various items regarding said information signal;

said release signal recorded on said second recording medium includes specific data for specifying various items regarding said information signal; and

said releasing means includes;

readout means for reading out said release signal and said specific data from said second recording medium;

recording restriction releasing means for releasing a recording restriction made by said restriction means, when said specific data read out by said readout means substantially coincides with said specific data included in said information signal; and

recording means for recording on said second recording medium, said release signal updated by said updating means, when a recording stop request is weele while said information signal is being recorded on said first recording medium in accordance with an operation of said recording restriction releasing means.

7. The recording control apparatus according to claim 6, wherein the specific data designates at least one of country, copyright holder, recording year, and recording number.

8. The recording control apparatus according to claim 2, wherein said release signal recorded on said second recording medium is constituted by units, each for releasing the restriction of recording of a specific amount of said information signal;

and

said releasing means includes;

readout means for reading out a number of units of said release signal from said second recording medium;

discrimination means for discriminating whether or not said number of units of said release signal read out by said readout means is greater than or equal to 1;

recording restriction releasing means for releasing the recording restriction of said restriction means, with said discrimination means having discriminated that said number of units of said release signal is greater than or equal to 1;

recording means for sequentially decreasing said number of units of said release signal read out by said readout means every time recording of a specific amount of said information signal is completed and recording said decreased number of units of said release signal on said second recording medium, with said information signal being recorded on said first recording medium based on an operation of said recording restriction releasing means; and

releasing stop means for stopping releasing of said recording restriction, with writing of said number of units of said release signal on said second recording medium by said recording means being prevented or said number of units becoming "0."

9. The recording control apparatus according to claim 2, wherein said releasing means includes:

readout means for reading out said release signal from said second recording medium;

storage means for storing said release signal read out by said readout means;

code generating means for generating a specific code with said release signal being stored in said storage means;

recording means for recording said specific code generated by said code generating means on said first and second recording mediums and recording said release signal stored in said storage means on said second recording medium;

recording restriction releasing means for releasing recording restriction by said restriction means, with said specific code being recorded on said first and second recording mediums by said recording means and said release signal being recording on said second recording medium; and

frequency recording means for recording on said second recording medium, said release signal updated by said updating means, when a recording stop request is weele while said information signal is being recorded on said first recording medium in accordance with an operation of said recording restriction releasing means.

10. The recording control apparatus according to claim 9, wherein said code generating means generates random specific codes, every time it is demand that the information signal be recorded on said first recording medium.

11. The recording control apparatus according to claim 9, wherein said code generating means generates specific codes which are continuous to one another, every time it is demand that the information signal be recorded on said first recording medium.

12. The recording control apparatus according to claim 9, further comprising:

readout apparatus for reading said specific codes from said first and second recording mediums and reading out said release signal from said second recording medium;

storage circuit for storing said release signal read out by said readout apparatus;

detection circuit for detecting coincidence of said specific codes read out by said readout apparatus;

retrieval means for retrieving an end section of said information signal recorded on said first recording medium, with said coincidence being detected by said detection circuit;

updating circuit for updating said frequency data of said release signal stored in said storage circuit in accordance with a retrieval operation of said retrieval means; and

recording means for recording said release signal having said frequency data updated by said updating circuit on said second recording medium, with an operation of said retrieval means being completed.

13. The recording control apparatus according to claim 9, further comprising:

storage circuit for storing said specific code generated by said code generating means; and

detection means for detecting coincidence of said specific code recorded on said second recording medium by said recording means with said specific code stored in said storage circuit, with a recording stop request being made at a time of recording said information signal on said first recording medium based on an operation of said recording restriction releasing means.

14. The recording control apparatus according to claim 9, further comprising:

recording means for recording said release signal on said second recording medium every time said frequency data is updated by said updating means, with said information signal being recorded on said first recording medium based on an operation of said recording restriction releasing means.

15. The recording control apparatus according to claim 14, further comprising:

first readout means for reading said specific codes from said first and second recording mediums;

detection means for detecting of coincidence of said specific codes read out by said first readout means;

retrieval means for retrieving an end section of said information signal recorded on first recording medium, with said coincidence being detected by said detection means;

second readout means for reading out said release signal recorded on said first recording medium at a retrieval location given by said retrieval means; and

recording means for recording said release signal read out by said second readout means on said second recording medium.

16. The recording control apparatus according to claim 2, further comprising:

readout means for reading out said release signal from second recording medium; and

coupling means for coupling said frequency data in said release signal read out by said readout means,

whereby a time for recording said information signal on said first recording medium is set based on said frequency data coupled by said coupling means.

17. The recording control apparatus according to claim 16, wherein said readout means has a plurality of readout devices, and said coupling means couples the frequency data items contained in said release signals obtained from said readout devices.

18. The recording control apparatus according to claim 1, wherein said release-signal-holding medium is a tape having a first area for recording said release signal and second areas for recording data indicating a start section and an end section of said release signal through buffer areas at front and rear of said first area, respectively.

19. The recording control apparatus according to claim 1, wherein said release-signal-holding medium is a card.

20. The recording control apparatus according to claim 1, wherein said first recording medium and said release-signal-holding medium occupy different recording areas of a recording medium.

21. The recording control apparatus according to claim 1, wherein the frequency data is composed of data items representing units of time.

22. The recording control apparatus according to claim 1, wherein the frequency data is composed of data items representing pieces of music.

23. An apparatus for releasing a restriction on the recording of an information signal on a recording medium comprising:

a recording medium which allows an information signal to be recorded;

a recording device for recording said information signal on said recording medium;

restricting means for restricting the recording of said information signal by said recording device on said recording medium;

releasing means for releasing the recording restriction of said restricting means on the basis of a release signal for releasing the recording restriction, said release signal being recorded on an area of said recording area which is different from an area recorded with said information signal, said release signal containing frequency data for restricting an amount of said information signal recordable on said recording medium with the recording restriction of said restricting means released; and

said releasing means including updating means for updating said frequency data so as to reduce an amount of said information signal recordable on said recording medium and in accordance with the amount of said information signal which is recorded on the recording medium.