Recording system for recording only those types of information which are specified by the record carrier

• US 5,060,219 A
• Filed: 12/20/1988
• Issued: 10/22/1991
• Est. Priority Date: 05/18/1988
• Status: Expired due to Term

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Lokhoff, Gerardus C. P., Roth, Rudolf, Raaymakers, Wilhelmus P. M.
• Primary Examiner(s): McElheny, Jr., Donald
• Application Number:
  US07/287,941
• Time in Patent Office: 1,036 Days
• Field of Search: 369/47, 369/48, 369/54, 369/286.6, 360/50, 360/27
• US Class Current: 369/47.21
• CPC Class Codes: G11B 19/247 using electrical means
• 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 20/00094 involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 20/00586 said format change concerning the physical format of the recording medium
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/12 Formatting, e.g. arrangement of data block or words on the record carriers within interface between computers and data recorders G06F3/06
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 2220/213 Read-only discs
• 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 23/28 Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs write-protect devices for tapes G11B23/042, G11B23/08714; dummy cassettes for locking in the drive G11B33/005
• CPC Class Codes: G11B 27/022 Electronic editing of analogue information signals, e.g. audio or video signals
• CPC Class Codes: G11B 27/031 Electronic editing of digitised analogue information signals, e.g. audio or video signals
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/19 by using information detectable on the record carrier
• CPC Class Codes: G11B 27/24 by sensing features on the record carrier other than the transducing track ; sensing signals or marks recorded by another method than the main recording
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 27/3063 Subcodes
• CPC Class Codes: G11B 27/329 : on a disc [VTOC]
• CPC Class Codes: G11B 7/0037 : with discs
• CPC Class Codes: G11B 7/00736 : Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/24082 : Meandering
• CPC Class Codes: G11B 7/28 : Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers

Abstract

A recording system includes a record carrier of an inscribable type and a recording apparatus. The record carrier is preconditioned with a control information pattern which includes identification of one or more types of information for which recording is permitted on such record carrier. The recording apparatus includes means for determining the type of information received for recording, means for reading the control information represented by the control information pattern on the record carrier, and control means for inhibiting recording if the received information is not of a type identified by the control information read from the record carrier.

Claims

1. An information recording system comprising a record carrier and apparatus for recording thereon information received by such apparatus for recording;

said record carrier having a servo-track wherein the received information may be recorded and a pattern of control information pre-recorded in said servo track which includes identification of one or more types of information which are permitted to be recorded on said record carrier, said pattern being in the form of a modulation of said servo track;

said recording apparatus comprising;

input means for receiving the information to be recorded and identifying the type of such information;

recording means including a recording head for scanning said servo track, said recording means being adapted to record the received information in the servo track and including means for reading the servo track modulation to derive said control information therefrom during scanning of the servo track;

detecting means for deriving from the control information produced by said read means the control information identifying the types of information permitted to be recorded; and

control means coupled to said input means and to said detecting means, said control means being responsive to the identifying control information from said detection means to control said recording means so that recording of the received information is only performed if the received information is of a type which is identified by the identifying control information.

2. A system as claimed in claim 1, wherein said input means comprises:

a plurality of input signal converter stages to which the received information to be recorded may be selectively applied; and

means for identifying the type of received information on the basis of the converter stage to which the received information is applied.

3. A system as claimed in claim 1, wherein said control information pattern includes identification of the plurality of types of information which are permitted to be recorded on said record carrier, and said input means comprises:

a plurality of input signal converter stages to which the received information to be recorded may be selectively applied;

selection means for selecting any of said input converter stages; and

means for identifying the type of received information on the basis of to which of said converter stages the received information is applied.

4. A system as claimed in claim 1, wherein said record carrier is erasable and said pre-recorded pattern of control information is non-erasable.

5. A system as claimed in claim 1, wherein the track modulation representing the control information pattern is included in one or more portions of the servo-track other than portions thereof where the received information is to be recorded.

6. A system as claimed in claim 1, wherein the track modulation representing the control information pattern is included in one or more portions of the servo-track wherein received information is also to be recorded.

7. A system as claimed in claim 5 or 6, wherein said recording head comprised an optical scanning device for scanning the servo-track with a radiation beam, and said read means includes a radiation-sensitive detector for detecting modulated radiation produced by the track modulation during scanning of the track.

8. A system as claimed in claim 5 or 6, wherein:

said record carrier is a compact disc (CD) on which the received information can be optically recorded;

the control information represented by the track modulation comprises a position information signal which indicates the positions of the relevant track portions relative to the beginning of the servo track;

said input means is adapted to convert the received information into a digital signal for recording on said CD; and

said control means is adapted to add subcode information to said digital signal in accordance with said position information signal, but to do so only if the received information is of a type which is identified by the control information.

9. A system as claimed in claim 8, wherein the control information represented by the track modulation further comprises a synchronization signal which can be distinguished from the position-information signal, and the synchronization signal identifies the types of information permitted to be recorded on said record carrier.

10. A system as claimed in claim 9, wherein the position-information signal is biphase-mark modulated and the synchronization signal has a waveform which differs from biphase-mark modulation.

11. A system as claimed in claim 1, wherein said record carrier is a compact disc (CD) and the track modulation is a radial undulation of said track at a frequency which is modulated in conformity with the control information.

12. A system as claimed in claim 1, wherein said record carrier is a compact disc (CD) and the servo track has a lead-in portion in which said pattern of control information is pre-formed;

and said control means adds said control information to the subcode-Q channel of a digital signal for recording on said CD.