CA2025644A1 - Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying - Google Patents

Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying

Info

Publication number
CA2025644A1
CA2025644A1 CA2025644A CA2025644A CA2025644A1 CA 2025644 A1 CA2025644 A1 CA 2025644A1 CA 2025644 A CA2025644 A CA 2025644A CA 2025644 A CA2025644 A CA 2025644A CA 2025644 A1 CA2025644 A1 CA 2025644A1
Authority
CA
Canada
Prior art keywords
recording device
information recording
information
copy
obtaining
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
CA2025644A
Other languages
French (fr)
Other versions
CA2025644C (en
Inventor
Hindrik Veldhuis
Rudolf Roth
Jacobus Petrus Josephus Heemskerk
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of CA2025644A1 publication Critical patent/CA2025644A1/en
Application granted granted Critical
Publication of CA2025644C publication Critical patent/CA2025644C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B20/10—Digital recording or reproducing
    • 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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • G11B27/3063—Subcodes
    • 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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/109—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM] by using specially-adapted hardware at the client
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress
    • 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
    • G11B20/10527—Audio or video recording; Data buffering arrangements
    • G11B2020/10537—Audio or video recording
    • G11B2020/10592—Audio or video recording specifically adapted for recording or reproducing multichannel signals
    • 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
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G11B2220/218—Write-once 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
    • G11B2220/2545—CDs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
    • G11B2220/913—Digital audio tape [DAT] format
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/032—Electronic editing of digitised analogue information signals, e.g. audio or video signals on tapes

Abstract

Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying.
A record carrier is disclosed carrying subcode information in addition to the main information. The subcode information comprises "copy" bits of alternating logic values (Figs. 3 and 4) to indicate that the recorded information is a copy. Moreover, a method and recording device (Fig. 5, 72) for obtaining such record carriers are described. Finally, a recording device (71; 72) is described, which comprises a detection circuit (85) which detects the presence of "copy"
bits of alternating logic values in the received information, and which comprises a decision circuit (94; 95) for deciding whether recording of the received information is allowed depending upon the detection of the presence of the "copy" bits of alternating logic values.
CA002025644A 1989-09-21 1990-09-18 Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying Expired - Lifetime CA2025644C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902358 1989-09-21
NL8902358 1989-09-21

Publications (2)

Publication Number Publication Date
CA2025644A1 true CA2025644A1 (en) 1991-03-22
CA2025644C CA2025644C (en) 2000-02-08

Family

ID=19855337

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002025644A Expired - Lifetime CA2025644C (en) 1989-09-21 1990-09-18 Record carrier, method of and information recording device for obtaining such record carriers, and information recording device comprising anti-copy means to inhibit unauthorized copying

Country Status (20)

Country Link
US (2) US5428598A (en)
EP (1) EP0418964B1 (en)
JP (3) JP3273781B2 (en)
KR (1) KR100231670B1 (en)
CN (1) CN1030629C (en)
AR (1) AR247311A1 (en)
AT (1) ATE118288T1 (en)
AU (1) AU657465B2 (en)
BR (1) BR9004656A (en)
CA (1) CA2025644C (en)
CZ (1) CZ285659B6 (en)
DE (1) DE69016725T2 (en)
DK (1) DK0418964T3 (en)
ES (1) ES2070267T3 (en)
HK (1) HK75696A (en)
HU (1) HU212224B (en)
MY (1) MY106622A (en)
RU (1) RU1836721C (en)
SK (1) SK280686B6 (en)
UA (1) UA29373C2 (en)

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Also Published As

Publication number Publication date
EP0418964A1 (en) 1991-03-27
US5453968A (en) 1995-09-26
HU212224B (en) 1996-04-29
MY106622A (en) 1995-06-30
JP2005166253A (en) 2005-06-23
HUT54822A (en) 1991-03-28
SK453690A3 (en) 2000-06-12
SK280686B6 (en) 2000-06-12
AR247311A1 (en) 1994-11-30
KR910006957A (en) 1991-04-30
JP3648190B2 (en) 2005-05-18
KR100231670B1 (en) 1999-11-15
EP0418964B1 (en) 1995-02-08
CN1050457A (en) 1991-04-03
AU6266690A (en) 1991-04-11
DE69016725T2 (en) 1995-09-07
CN1030629C (en) 1996-01-03
CA2025644C (en) 2000-02-08
CZ453690A3 (en) 1999-07-14
AU657465B2 (en) 1995-03-16
ATE118288T1 (en) 1995-02-15
ES2070267T3 (en) 1995-06-01
JPH03108162A (en) 1991-05-08
JP2002208224A (en) 2002-07-26
DE69016725D1 (en) 1995-03-23
CZ285659B6 (en) 1999-10-13
US5428598A (en) 1995-06-27
UA29373C2 (en) 2000-11-15
HK75696A (en) 1996-05-10
BR9004656A (en) 1991-09-10
JP3273781B2 (en) 2002-04-15
RU1836721C (en) 1993-08-23
DK0418964T3 (en) 1995-07-10

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