Data recording apparatus, method therefor, data reproducing apparatus, method therefor and record medium

• US 6,134,201 A
• Filed: 06/27/1996
• Issued: 10/17/2000
• Est. Priority Date: 06/30/1995
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Osawa, Yoshitomo, Sako, Yoichiro, Kurihara, Akira, Owa, Hideo, Kawashima, Isao
• Primary Examiner(s): Tran, Thang V.
• Application Number:
  US08/671,347
• Time in Patent Office: 1,573 Days
• Field of Search: 369/59, 369/48, 369/60, 369/47, 386/111, 348/384, 348/387, 348/419, 360/48, 360/49
• US Class Current: 369/47.19
• CPC Class Codes: G06F 21/1011 to devices
• CPC Class Codes: G06F 2211/007 Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
• CPC Class Codes: G06Q 20/3829 involving key management
• 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 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/00144 involving a user identifier, e.g. a unique customer ID
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/00188 involving measures which result in a restriction to authorised devices recording or reproducing contents to/from a record carrier
• CPC Class Codes: G11B 20/00195 using a device identifier associated with the player or recorder, e.g. serial numbers of playback apparatuses or MAC addresses
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00304 the key being stored in the lead-in area [LIA]
• CPC Class Codes: G11B 20/00318 the key being stored in the TOC
• CPC Class Codes: G11B 20/00347 wherein the medium identifier is used as a key
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00514 wherein the entire content is encrypted with the same key, e.g. disc key or master key

Abstract

A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced, the data recording apparatus having a terminal to which encoder ID specific for the data recording apparatus is input, a recording unit for recording at least the encoder ID on an optical disk, and an encoding circuit for, in accordance with the encoder ID, encoding data supply through a terminal and required to be recorded so that encoded data is, together with the encoder ID, recorded on the optical disk.

Claims

1. A data recording apparatus for recording data on a recording medium, comprising:

input means for inputting data and specific identification information which identifies said data recording apparatus and which is unique to said recording apparatus;

recording means for recording said data and said identification information on said recording medium; and

encoding means for encoding data, to be recorded on said recording medium in accordance with said identification information,

wherein said recording means records said encoded data together with said identification information on said recording medium;

wherein said identification information recorded on said recording medium is used to decode said encoded data of said recording medium.

2. A data recording apparatus according to claim 1, wherein said identification information is encoder identification information specific to said data recording apparatus.

3. A data recording apparatus according to claim 1, wherein said recording means records said identification information on a predetermined region of said recording medium.

4. A data recording apparatus according to claim 1 further comprising mixing means for mixing said identification information in a data row of said encoded data, wherein said recording means records, on said recording medium, said identification information mixed in said data row together with said encoded data.

5. A data recording method which is employed when data is recorded on a recording medium by a data recording apparatus, said data recording method comprising the steps of:

inputting data and identification information specific for said data recording apparatus and which is unique to said data recording apparatus;

encoding the data to be recorded on said recording medium in accordance with said identification information; and

recording said encoded data and said identification information on said recording medium;

wherein said identification information recorded on said recording medium is used to decode said encoded data of said recording medium.

6. A data recording method according to claim 5, wherein said identification information is encoder identification information, and wherein said identification information is recorded on a predetermined region of said record medium.

7. A data recording method according to claim 5, wherein said identification information is mixed in a data row of said encoded data so as to be recorded together with said encoded data.

8. A data reproducing apparatus for reproducing data from a recording medium, on which identification information specific to a data recording apparatus and which is unique to said data recording apparatus, together with recorded data, is recorded, said data reproducing apparatus comprising:

data reading means for reading data from said recording medium;

identification information extracting means for extracting identification information from data read from said recording medium, wherein reproduction of data from said recording medium is interrupted when said identification information cannot be extracted; and

decoding means for decoding recorded data, which has been encoded in accordance with said identification information, said recorded data being decoded in accordance with said identification information which had been recorded on said recording medium and which had been extracted by said identification information extracting means provided that said identification information identifies an encoder circuit of said data recording apparatus.

9. A data reproducing apparatus according to claim 8, wherein said data reading means reads said identification information recorded on a predetermined region of said recording medium.

10. A data reproducing apparatus according to claim 8, wherein said identification information extracting means extracts said identification information mixed with a data row of recorded data, which has been read from said recording medium and which has been encoded.

11. A data reproducing apparatus for reproducing data from a recording medium, on which identification information specific to a data recording apparatus and which is unique to said data recording apparatus, together with recorded data, is recorded, said data reproducing apparatus comprising:

data reading means for reading data from said recording medium;

identification information extracting means for extracting identification information from data read from said recording medium; and

decoding means for decoding encoded recorded data, which has been encoded in accordance with said identification information, said recorded data being decoded in accordance with said identification information which had been recorded on said recording medium and which had been extracted by said identification extracting means;

wherein said decoding means requires said identification information which identifies an encoder circuit of said data recording apparatus to decode said encoded recorded data.

12. A data reproducing apparatus according to claim 11, wherein said data reading means reads said identification information recorded on a predetermined region of said recording medium.

13. A data reproducing apparatus according to claim 12, wherein said identification information extracting means extracts said identification information mixed with a data row of recorded data, which has been read from said recording medium and which has been encoded.

14. A data reproducing method for reproducing data from a recording medium on which identification information specific to a data recording apparatus and which is unique to said data recording apparatus is recorded together with recorded data, said data reproducing method comprising the steps of:

reading data from said recording medium;

extracting said identification information from data read from said recording medium; and

interrupting reproduction of data from said recording medium when said identification information cannot be extracted;

wherein recorded data which has been encoded in accordance with said identification information is decoded in accordance with said extracted identification information recorded on said recording medium, provided that said identification information identifies an encoder circuit of said data recording apparatus.

15. A data reproducing method according to claim 14, wherein said identification information recorded on a predetermined region of said recording medium is read.

16. A data reproducing method according to claim 14, wherein said identification information mixed with a data row of recorded data, which has been read from said recording medium and which has been encoded, is extracted.

17. A data reproducing method for reproducing data from a recording medium on which identification information specific to a data recording apparatus and which is unique to said data recording apparatus is recorded together with recorded data, said recording method comprising the steps of:

reading data from said recording medium;

extracting said identification information from data read from said recording medium; and

decoding recorded data, which has been encoded in accordance with said identification information, in accordance with extracted identification information;

wherein said identification information recorded on said recording medium which identifies an encoder circuit of said data recording apparatus is used to decode said encoded data.

18. A data reproducing method according to claim 17, wherein said identification information recorded on a predetermined region of said recording medium.

19. A data reproducing method for reproducing data from a recording medium on which identification information specific to a data recording apparatus and which is unique to said data recording apparatus is recorded together with data, said method comprising the steps of:

reading data from said recording medium;

extracting said identification information from data read from said recording medium; and

decoding recorded data, which has been encoded in accordance with said identification information, in accordance with said extracted identification information recorded on said recording medium, provided that said extracted identification information identifies an encoder circuit of said data recording apparatus;

wherein said identification information mixed with a data row of record data, which has been read from said recording medium and which has been encoded, is extracted.