FR2288369A1 - Enregistrement magnetique - Google Patents

Enregistrement magnetique

Info

Publication number
FR2288369A1
FR2288369A1 FR7531358A FR7531358A FR2288369A1 FR 2288369 A1 FR2288369 A1 FR 2288369A1 FR 7531358 A FR7531358 A FR 7531358A FR 7531358 A FR7531358 A FR 7531358A FR 2288369 A1 FR2288369 A1 FR 2288369A1
Authority
FR
France
Prior art keywords
magnetic recording
recording
magnetic
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.)
Withdrawn
Application number
FR7531358A
Other languages
English (en)
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.)
EMI Ltd
Original Assignee
EMI Ltd
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 EMI Ltd filed Critical EMI Ltd
Publication of FR2288369A1 publication Critical patent/FR2288369A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/125—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by magnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/02—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the selection of materials, e.g. to avoid wear during transport through the machine
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers 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
    • 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
    • G11B23/30—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 with provision for auxiliary signals
    • G11B23/36—Signals on record carriers or on containers and recorded by the same method as the main recording
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
    • G11B5/842—Coating a support with a liquid magnetic dispersion
    • G11B5/845—Coating a support with a liquid magnetic dispersion in a magnetic field

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Magnetic Record Carriers (AREA)
  • Paints Or Removers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)
FR7531358A 1974-10-16 1975-10-14 Enregistrement magnetique Withdrawn FR2288369A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4474774A GB1529566A (en) 1974-10-16 1974-10-16 Magnetic recording
GB254675 1975-01-21

Publications (1)

Publication Number Publication Date
FR2288369A1 true FR2288369A1 (fr) 1976-05-14

Family

ID=26237585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531358A Withdrawn FR2288369A1 (fr) 1974-10-16 1975-10-14 Enregistrement magnetique

Country Status (5)

Country Link
JP (1) JPS5165605A (fr)
DE (1) DE2545580A1 (fr)
FR (1) FR2288369A1 (fr)
GB (1) GB1529566A (fr)
NL (1) NL7512181A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406277A1 (fr) * 1977-10-15 1979-05-11 Emi Ltd Matieres magnetiquement structurees
FR2438892A1 (fr) * 1978-10-13 1980-05-09 Sony Corp Dispositif d'inspection de l'etiquette d'une cassette
WO1980002757A1 (fr) * 1979-06-06 1980-12-11 H Winderlich Procede de protection de supports d'enregistrement du son et de leurs etiquettes et/ou emballages contre l'imitation
FR2515403A1 (fr) * 1981-10-28 1983-04-29 Quadrivium Inf Procede d'identification d'un enregistrement sonore et installation de duplication mettant en oeuvre le procede
FR2534433A1 (fr) * 1982-10-08 1984-04-13 Thomson Csf Procede de protection d'une sequence d'images video contre une utilisation frauduleuse et dispositifs pour la mise en oeuvre de ce procede
FR2535885A1 (fr) * 1982-11-08 1984-05-11 Vault Corp Procede et appareil pour dejouer le copiage non autorise de donnees enregistrees
EP0110511A2 (fr) * 1982-11-22 1984-06-13 Dysan Corporation Méthode et dispositif pour vérifier une mémoire à disque
WO1986005622A1 (fr) * 1985-03-18 1986-09-25 Minnesota Mining And Manufacturing Company Cassette de bande magnetique sur laquelle est preenregistree une tonalite basse frequence

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE52736B1 (en) * 1980-12-16 1988-02-03 Mcwhirter Holding Pty Limited Method and apparatus for verification of recorded messages
AT378620B (de) * 1983-08-11 1985-09-10 Heinz Seidl Magnetogrammtraeger, dessen herkunft unentfernbar gekennzeichnet ist
JPH0512068Y2 (fr) * 1985-02-27 1993-03-26
JPH0512067Y2 (fr) * 1985-02-27 1993-03-26
JP2569294Y2 (ja) * 1991-01-25 1998-04-22 日産自動車株式会社 線条体用プロテクター

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2406277A1 (fr) * 1977-10-15 1979-05-11 Emi Ltd Matieres magnetiquement structurees
FR2438892A1 (fr) * 1978-10-13 1980-05-09 Sony Corp Dispositif d'inspection de l'etiquette d'une cassette
WO1980002757A1 (fr) * 1979-06-06 1980-12-11 H Winderlich Procede de protection de supports d'enregistrement du son et de leurs etiquettes et/ou emballages contre l'imitation
FR2515403A1 (fr) * 1981-10-28 1983-04-29 Quadrivium Inf Procede d'identification d'un enregistrement sonore et installation de duplication mettant en oeuvre le procede
EP0078218A1 (fr) * 1981-10-28 1983-05-04 Dimitri Baranoff-Rossine Procédé d'identification d'enregistrements sonores illicites et installation de duplication mettant en oeuvre le procédé
FR2534433A1 (fr) * 1982-10-08 1984-04-13 Thomson Csf Procede de protection d'une sequence d'images video contre une utilisation frauduleuse et dispositifs pour la mise en oeuvre de ce procede
EP0107567A1 (fr) * 1982-10-08 1984-05-02 Thomson-Csf Procédé de protection d'une séquence d'images vidéo contre une utilisation frauduleuse, et dispositifs pour la mise en oeuvre de ce procédé
FR2535885A1 (fr) * 1982-11-08 1984-05-11 Vault Corp Procede et appareil pour dejouer le copiage non autorise de donnees enregistrees
EP0110511A2 (fr) * 1982-11-22 1984-06-13 Dysan Corporation Méthode et dispositif pour vérifier une mémoire à disque
EP0110511A3 (en) * 1982-11-22 1985-08-28 Dysan Corporation Method and apparatus for authenticating memory disk
WO1986005622A1 (fr) * 1985-03-18 1986-09-25 Minnesota Mining And Manufacturing Company Cassette de bande magnetique sur laquelle est preenregistree une tonalite basse frequence

Also Published As

Publication number Publication date
DE2545580A1 (de) 1976-05-06
NL7512181A (nl) 1976-04-21
GB1529566A (en) 1978-10-25
JPS5165605A (fr) 1976-06-07

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Legal Events

Date Code Title Description
ST Notification of lapse