CA2459238A1 - High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus - Google Patents

High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus Download PDF

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Publication number
CA2459238A1
CA2459238A1 CA002459238A CA2459238A CA2459238A1 CA 2459238 A1 CA2459238 A1 CA 2459238A1 CA 002459238 A CA002459238 A CA 002459238A CA 2459238 A CA2459238 A CA 2459238A CA 2459238 A1 CA2459238 A1 CA 2459238A1
Authority
CA
Canada
Prior art keywords
optical disc
area
data
disc
rom
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002459238A
Other languages
French (fr)
Other versions
CA2459238C (en
Inventor
Jin Yong Kim
Sang Woon Suh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
Lg Electronics Inc.
Jin Yong Kim
Sang Woon Suh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020020037947A external-priority patent/KR20040003288A/en
Priority claimed from KR1020020054762A external-priority patent/KR100925205B1/en
Application filed by Lg Electronics Inc., Jin Yong Kim, Sang Woon Suh filed Critical Lg Electronics Inc.
Publication of CA2459238A1 publication Critical patent/CA2459238A1/en
Application granted granted Critical
Publication of CA2459238C publication Critical patent/CA2459238C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00615—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
    • G11B20/0063—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames wherein the modification to the logical format mainly concerns management data, e.g., by changing the format of the TOC or the subcode
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/12—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark
    • G11B19/122—Control of operating function, e.g. switching from recording to reproducing by sensing distinguishing features of or on records, e.g. diameter end mark involving the detection of an identification or authentication mark
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/28—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs
    • G11B23/281—Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs by changing the physical properties of the record carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/005—Reproducing
    • G11B7/0053—Reproducing non-user data, e.g. wobbled address, prepits, BCA
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1288—Formatting by padding empty spaces with dummy data, e.g. writing zeroes or random data when de-icing optical discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Abstract

A high-density optical disc such as BD-ROM (Blu-ray Disc ROM) or BD-R (Blu-ray Disc Recordable) having a function for preventing unauthorized duplication of data written therein, and a method for restricting playback of illegally duplicated optical discs are disclosed. In accordance with the invention, the optical disc is additionally recorded with disc identification information, adapted to identify the kind of the optical disc, in the form of physical marks, on a particular area thereof. The method of the invention includes the steps of detecting and identifying disc identification information from an optical disc at an initial stage of a servo operation carried out by an optical disc apparatus adapted to play back the optical disc, while identifying the format of data read out from the optical disc, thereby determining whether or not the read-out data was illegally duplicated on the optical disc, and forcibly restricting a data reproduction operation of the optical disc apparatus, based on the result of the determination. Accordingly, it is possible to efficiently prevent unauthorized duplication of data, recorded on a high-density optical disc such as BD-ROM, onto BD-RE or BD-R, while efficiently preventing reproduction of the illegally duplicated data.

Claims (16)

1. A high-density optical disc comprising:
a center hole and a clamping area for allowing the optical disc to be loaded in position in an optical disc apparatus; and an information area for recording disc management information and data thereon;
wherein a lead-in area, a data area, and a lead-out area are assigned to the information area, and wherein physical mark information is recorded in a selected one of a particular area assigned preceding the lead-in area, a particular region assigned to the lead-in area, and a particular region assigned to the lead-out area.
2. The high-density optical disc according to claim 1, wherein the physical mark information is recorded to have a wobbled pattern of pits representing duplication preventing information.
3. The high-density optical disc according to claim 1, wherein the physical mark information is recorded to have a pattern of repeated mark/space pairs with respect to a monotone high-frequency-modulated groove, each mark/space pair consisting of a mark and a space each having an optional length.
4. The high-density optical disc according to claim 3, wherein the marks and spaces of the mark/space pairs are aligned with one another in each recording field of the monotone high-frequency-modulated groove.
5. The high-density optical disc according to claim 4, wherein the length of the marks and spaces of each recording field is determined to be a different length in accordance with a data value associated with the recording field.
6. The high-density optical disc according to claim 4, wherein each of the marks and spaces in a recording field has a length of 3T when data value associated with the recording field has a value of "1" , while having a length of 9T when the associated data value has a value of "0", and wherein the recording field has a length of 32T.
7. The high-density optical disc according to claim 4, wherein the optical disc is a Blu-ray disc ROM (BD-ROM) or a write-once Blu-ray disc (BD-R) authored for manufacture of BD-ROMs.
8. The high-density optical disc according to claim 1, wherein the physical mark information is detected at an initial stage of a servo operation carried out in the optical disc apparatus, separately from a decoding operation to be carried out in the optical disc apparatus.
9. The high-density optical disc according to claim 1, wherein the physical mark information is identification information unique to a Blu-ray disc ROM (BD-ROM).
10. The high-density optical disc according to claim 9, wherein the particular area preceding the lead-in area is an area where writing of data is impossible after manufacture of the optical disc.
11. The high-density optical disc according to claim 1, wherein the physical mark information is identification information unique to a write-once Blu-ray disc recordable (BD-R) .
12. The high-density optical disc according to claim 11, wherein the particular area preceding the lead-in area is a write-once area where writing of data is possible only one time after manufacture of the optical disc.
13. A method for restricting playback of an optical disc in an optical disc apparatus, comprising the steps of:
(A) detecting and identifying disc identification information additionally recorded, in the form of physical marks, on a particular area of an optical disc; and (B) selectively restricting a data reproduction operation, based on the identified disc identification information and a format of data read out from the optical disc.
14. The method according to claim 13, wherein the step (A) comprises the step of detecting and identifying disc identification information additionally recorded, in the form of-physical marks, on a particular area preceding a lead-in area assigned to the optical disc, at an initial stage of a servo operation carried out by the optical disc apparatus.
15. The method according to claim 13, wherein the step (B) comprises the steps of carrying out a normal playback operation when both the identified disc identification information and the format of the read-out data are unique to a Blu-ray disc ROM
(BD-ROM) .
16. The method according to claim 13, wherein the step (B) comprises the steps of determining that the read-out data was illegally duplicated when the identified disc identification information is not unique to a Blu-ray disc ROM (BD-ROM) whereas the format of the read-out data is unique to the BD-ROM, and stopping a playback operation.
CA2459238A 2002-07-02 2003-07-01 High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus Expired - Fee Related CA2459238C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
KR10-2002-0037947 2002-07-02
KR1020020037947A KR20040003288A (en) 2002-07-02 2002-07-02 High density optical disc and method for restricting playback in optical disc driver
KR1020020054762A KR100925205B1 (en) 2002-09-10 2002-09-10 High density optical disc and method for restricting playback in optical disc driver
KR10-2002-0054762 2002-09-10
PCT/KR2003/001292 WO2004006231A1 (en) 2002-07-02 2003-07-01 High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus

Publications (2)

Publication Number Publication Date
CA2459238A1 true CA2459238A1 (en) 2004-01-15
CA2459238C CA2459238C (en) 2012-10-09

Family

ID=36648925

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2459238A Expired - Fee Related CA2459238C (en) 2002-07-02 2003-07-01 High-density optical disc and method for restricting playback of the high-density optical disc in optical disc apparatus

Country Status (11)

Country Link
US (4) US8077572B2 (en)
EP (2) EP1518227B1 (en)
JP (2) JP2005531880A (en)
CN (2) CN100514458C (en)
AU (1) AU2003237063B2 (en)
BR (1) BR0305347A (en)
CA (1) CA2459238C (en)
MX (1) MXPA04001985A (en)
RU (1) RU2473141C2 (en)
TW (2) TWI375221B (en)
WO (1) WO2004006231A1 (en)

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