OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN OPTICAL DISK REPRODUCTION APPARATUS, A MARKING FORMING APPARATUS, A METHOD OF FORMING A LASER MARKING ON AN OPTICAL DISK, AND A METHOD OF MANUFACTURING AN OPTICAL DISK

• US 6,457,128 B1
• Filed: 06/15/2000
• Issued: 09/24/2002
• Est. Priority Date: 10/09/1995
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Tanaka, Shinichi, Oshima, Mitsuaki, Gotoh, Yoshiho, Koishi, Kenji, Moriya, Mitsuro
• Primary Examiner(s): Barrón, Gilberto
• Assistant Examiner(s): Callahan, Paul E.
• Application Number:
  US09/595,139
• Time in Patent Office: 831 Days
• Field of Search: 380/203, 380/201, 713/193, 705/51, 705/57
• US Class Current: 713/193
• CPC Class Codes: G06K 1/126 by photographic or thermographic registration recording apparatus for measuring instruments G01D15/00
• CPC Class Codes: G06K 19/04 characterised by the shape
• CPC Class Codes: G06K 19/06018 one-dimensional coding
• CPC Class Codes: G06K 19/06028 using bar codes
• CPC Class Codes: G06K 19/08 using markings of different kinds or more than one marking of the same kind in the same record carrier, e.g. one marking being sensed by optical and the other by magnetic means
• CPC Class Codes: G06K 19/14 the marking being sensed by radiation
• CPC Class Codes: G06K 2019/06243 concentric-code
• CPC Class Codes: G06K 2019/06271 Relief-type marking
• CPC Class Codes: G11B 13/04 magnetically or by magnetisation and optically or by radiation, for changing or sensing optical properties
• CPC Class Codes: G11B 13/045 combined recording by magnetic and optic means
• 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 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• 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 20/00123 the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
• 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 20/00144 involving a user identifier, e.g. a unique customer ID
• CPC Class Codes: G11B 20/00152 involving a password
• CPC Class Codes: G11B 20/0021 : involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/0026 : the key being stored as a barcode
• CPC Class Codes: G11B 20/00268 : said barcode being recorded in a burst cutting area [BCA]
• CPC Class Codes: G11B 20/00326 : the key being embossed on the record carrier
• CPC Class Codes: G11B 20/00347 : wherein the medium identifier is used as a key
• CPC Class Codes: G11B 20/00384 : the key being derived from a physical signature of the record carrier, e.g. unique feature set
• CPC Class Codes: G11B 20/00492 : wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00528 : wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
• CPC Class Codes: G11B 20/00543 : wherein external data is encrypted, e.g. for secure communication with an external device or for encrypting content on a separate record carrier
• CPC Class Codes: G11B 20/00557 : wherein further management data is encrypted, e.g. sector headers, TOC or the lead-in or lead-out areas
• 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 20/0084 : wherein the usage restriction can be expressed as a specific time or date
• CPC Class Codes: G11B 20/00855 : involving a step of exchanging information with a remote server
• CPC Class Codes: G11B 20/00876 : wherein physical copy protection means are attached to the medium, e.g. holograms, sensors, or additional semiconductor circuitry
• CPC Class Codes: G11B 20/0092 : involving measures which are linked to media defects or read/write errors
• CPC Class Codes: G11B 20/10 : Digital recording or reproducing
• CPC Class Codes: G11B 20/1217 : on discs
• CPC Class Codes: G11B 20/1252 : for discontinuous data, e.g. digital information signals, computer programme data
• CPC Class Codes: G11B 20/1403 : characterised by the use of two levels
• CPC Class Codes: G11B 20/1419 : to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
• CPC Class Codes: G11B 20/1426 : conversion to or from block codes or representations thereof
• CPC Class Codes: G11B 20/1833 : by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11B 2007/0013 : for carriers having multiple discrete layers
• CPC Class Codes: G11B 2020/122 : Burst cutting area [BCA]
• CPC Class Codes: G11B 2020/1259 : with ROM/RAM areas
• CPC Class Codes: G11B 2220/213 : Read-only discs
• CPC Class Codes: G11B 2220/2545 : CDs
• CPC Class Codes: G11B 2220/2562 : DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
• CPC Class Codes: G11B 2220/61 : wherein solid state memory is used for storing A/V content storing computer data in solid state memories G06F
• CPC Class Codes: G11B 23/0042 : with provision for auxiliary features sensing such features G11B17/00, G11B19/02
• CPC Class Codes: G11B 23/281 : by changing the physical properties of the record carrier
• CPC Class Codes: G11B 23/283 : Security features, e.g. digital codes
• CPC Class Codes: G11B 23/284 : on the record carrier
• CPC Class Codes: G11B 23/30 : with provision for auxiliary signals
• CPC Class Codes: G11B 23/34 : Signal means additional to the main recording track, e.g. photoelectric sensing of sprocket holes for timing
• CPC Class Codes: G11B 23/38 : Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
• 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 5/86 : Re-recording, i.e. transcribing information from one magnetisable record carrier on to one or more similar or dissimilar record carriers by varying the order of the information G11B27/029, G11B27/036
• CPC Class Codes: G11B 7/0037 : with discs
• CPC Class Codes: G11B 7/005 : Reproducing G11B7/0065 takes precedence
• CPC Class Codes: G11B 7/0053 : Reproducing non-user data, e.g. wobbled address, prepits, BCA
• CPC Class Codes: G11B 7/007 : 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
• 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 7/24038 : Multiple laminated recording layers
• CPC Class Codes: G11B 7/26 : Apparatus or processes specially adapted for the manufacture of record carriers
• CPC Class Codes: G11B 7/268 : Post-production operations, e.g. initialising phase-change recording layers, checking for defects investigating the presence of flaws or contamination in optical discs G01N21/9506

Abstract

Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.

Claims

1. An optical disk on which data is recorded comprising:

a first recording area where main information is recorded,

a second recording area having barcode-like marks each of which has a strip-like configuration in a radius direction, which are disposed in a circumferential direction and which are recorded as sub information wherein

said first recording area contains

a control data area which represents a physical property of the optical disk and is located in the lead-in area,

said second recording area is disposed inside from said control data area on said first recording area and said second recording area is overlapped with said lead in area,

wherein in a prescribed region of said control data area, an identifier is provided for indicating whether said barcode-like mark is present or not on said optical disk, said identifier and said barcode-like mark are in respectively different locations on said disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality of bars, each of said bars extending in a radial direction, and

a mark is marked by laser beam on an information layer of said disk, information based on the position of said mark is encrypted and said encrypted information is included in said barcode-like mark,

a specific ring-like area on the second recording area is divided into a plurality of sections with substantially the same width (τ

) in a circumferential direction, said width (τ

) being corresponding to a frequency of a channel clock of modulation signal of said sub information,

said barcode-like marks are formed within the sections corresponding to the sub information, with RZ recording method, and

a width of the barcode-like mark is substantially half or less of the section width (τ

).

3. An optical disk according to claim 1, wherein one of said bars has a lower reflectivity than an average reflectivity of an area between said one of said bars and another of said bars.

4. An optical disk according to claim 1, wherein one of said bars has a lower reflectivity than an average reflectivity of an area between said one of said bars and another of said bars.

2. An optical disk on which data is recorded, comprising:

a first recording area where main information is recorded,

second recording area having barcode-like marks each of which has a strip-like configuration in a radius direction, which are disposed in a circumferential direction and which are recorded as sub information wherein

said first recording area contains

a control data area which represents a physical property of the optical disk and is located in the lead-in area,

said second recording area is disposed inside from said control data 11 area on said first recording area and said second recording area is overlapped with said lead in area,

wherein in a prescribed region of said control data area, an identifier is provided for indicating whether said barcode-like mark is present or not on said optical disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality of bars, each of said bars extending in a radial direction, and

a mark is marked by laser beam on an information layer of said disk, information based on the position of said mark is applied with a digital signature and said information applied with said digital signature is included in said barcode-like mark,

a specific ring-like area on the second recording area is divided into a plurality of sections with substantially the same width (τ

) in a circumferential direction, said width (τ

) being corresponding to a frequency of a channel clock of modulation signal of said sub information,

said barcode-like marks are formed within the sections corresponding to the sub information, with RZ recording method, and

a width of the barcode-like mark is substantially half or less of the section width (τ

).

7. An optical disk according to claim 2, wherein one of said bars has a lower reflectivity than an average reflectivity of an area between said one of said bars and another of said bars.

8. An optical disk according to claim 2, wherein one of said bars has a lower reflectivity than an average reflectivity of an area between said one of said bars and another of said bars.

5. An optical disk reproduction apparatus for use with a disk on which data is recorded, wherein in a prescribed region of said disk, an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said identifier and said barcode-like mark are in respectively different locations on said disk, said barcode-like mark disposed in a circumferential direction, and said barcode-like mark having a plurality of bars, each of said bars extending in a radial direction, and a mark is marked by laser beam on a information layer of said disk, information based on the position of said mark is encrypted and said encrypted information is included in said barcode-like mark, and said bar-code like mark is formed with a RZ recording method, said apparatus comprising:

reproduction means for reproducing said barcode-like mark on said optical disk;

RZ-demodulation means for RZ-demodulating said bar-code like mark

identifier detection means for detecting said identifier on said optical disk, and

control means for controlling a prescribed operation based on said identifier detected by said identifier detection means,

wherein said reproduction means includes an optical head for performing reproduction,

positional information readout means for reproducing, from said barcode-like mark, information regarding the position of said mark,

mark measurement means for determining an actual position of said mark, and

reproducing means for reproducing data recorded on said optical disk based on a comparison of

said information reproduced by said positional information readout means, and

said actual position determined by said mark measurement means.

6. An optical disk reproduction apparatus according to claim 5, wherein said positional information reading means decrypts the reproduced information and obtains said reproduced information based on the position of said mark.