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 6,480,960 B1
• Filed: 11/15/2000
• Issued: 11/12/2002
• 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): Barrön, Gilberto
• Assistant Examiner(s): Callahan, Paul E.
• Application Number:
  US09/713,280
• Time in Patent Office: 727 Days
• Field of Search: 380/201, 380/203, 713/182, 713/193, 713/194, 705/51, 705/56, 705/57, 705/62
• 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
• 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

A barcode is formed on an optical disk. An optical disk is provided which has a control data area and an identifier for indicating the presence or absence of the barcode in the control data area. A beam pattern is focused on a reflective film of the optical disk in an information signal region on which data is recorded. The optical disk is rotated to form the barcode.

Claims

1. A method of for a barcode on an optical disk, said method comprising the steps of:

a) providing said optical disk having a control data area and an identifier for indicating the presence or absence of said barcode in said control data area,

b) focusing a beam pattern on a reflective film of said optical disk in an information signal region on which data is recorded, and

c) rotating said optical disk while performing step b) to form said barcode.

2. A method of forming a barcode on an optical disk according to claim 1, wherein

while forming step b) to form said barcode, pulsed laser light from a light source is made into a rectangular beam pattern by using a rectangular mask and said rectangular pattern is intensity-modulated by a signal for making said barcode and focused on a reflective film in an information signal region in a prescribed radius portion of the optical disk.

3. A method of forming a barcode on an optical disk according to claim 1, wherein

said optical disk is constructed from two disk-substrates laminated together.

4. A method of forming a barcode on an optical disk according to claim 1, wherein

said barcode is made by removing the reflective film of said optical disk.