ES2107676T3 - Procesamiento de datos registrados. - Google Patents

Procesamiento de datos registrados.

Info

Publication number
ES2107676T3
ES2107676T3 ES93916121T ES93916121T ES2107676T3 ES 2107676 T3 ES2107676 T3 ES 2107676T3 ES 93916121 T ES93916121 T ES 93916121T ES 93916121 T ES93916121 T ES 93916121T ES 2107676 T3 ES2107676 T3 ES 2107676T3
Authority
ES
Spain
Prior art keywords
tape
circuit
magnetic
nucleus
processing
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.)
Expired - Lifetime
Application number
ES93916121T
Other languages
English (en)
Inventor
Ian Macdonald Green
Simon Nicholas Murray Willcock
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.)
Central Research Laboratories Ltd
Original Assignee
Central Research Laboratories 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
Priority claimed from GB929215924A external-priority patent/GB9215924D0/en
Application filed by Central Research Laboratories Ltd filed Critical Central Research Laboratories Ltd
Application granted granted Critical
Publication of ES2107676T3 publication Critical patent/ES2107676T3/es
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
    • G11B20/00086—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
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
    • 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
    • G11B20/00166—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised contents recorded on or reproduced from a record carrier, e.g. music or software
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1816—Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Artificial Intelligence (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Digital Magnetic Recording (AREA)
  • Credit Cards Or The Like (AREA)
  • Traffic Control Systems (AREA)
  • Holo Graphy (AREA)
  • Pinball Game Machines (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

UNA BOBINA (6), QUE FORMA PARTE DE UN CIRCUITO (8) SINTONIZADO, SE ENROLLA ALREDEDOR DE UN NUCLEO (2) MAGNETICO RESONANTE. A MEDIDA QUE SE PASA DEBAJO DEL NUCLEO (2) UNA CINTA MAGNETICA (14), SE PRODUCEN VARIACIONES EN LA AMPLITUD Y FRECUENCIA DEL CIRCUITO (8), DEPENDIENDO DE LOS DATOS MAGNETICOS SOBRE LA CINTA (14). SE MANIPULAN DATOS SELECCIONADOS PARA DEDUCIR VARIOS VALORES, PARA COMBINACION POR UNA PUERTA "AND" (CIRCUITO QUE REALIZA LA OPERACION LOGICA "Y"). TAN SOLO SI EL VALOR DE COMBINACION ESTA POR ENCIMA DE UN VALOR UMBRAL, ES UNA INDICACION DE QUE LA CINTA (14) ES AUTENTICA Y NO UNA COPIA DE PRUEBA.
ES93916121T 1992-07-27 1993-07-27 Procesamiento de datos registrados. Expired - Lifetime ES2107676T3 (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929215924A GB9215924D0 (en) 1992-07-27 1992-07-27 Improvements in or relating to magnetic data reading
GB9305273A GB2269254A (en) 1992-07-27 1993-03-15 Verification of recorded data

Publications (1)

Publication Number Publication Date
ES2107676T3 true ES2107676T3 (es) 1997-12-01

Family

ID=26301326

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93916121T Expired - Lifetime ES2107676T3 (es) 1992-07-27 1993-07-27 Procesamiento de datos registrados.

Country Status (9)

Country Link
EP (1) EP0658267B1 (es)
JP (1) JP3597530B2 (es)
KR (1) KR100271691B1 (es)
AU (1) AU664476B2 (es)
CA (1) CA2141059C (es)
DE (1) DE69314499T2 (es)
ES (1) ES2107676T3 (es)
NZ (1) NZ254215A (es)
WO (1) WO1994002943A1 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2324644B (en) * 1997-04-22 2001-09-12 Central Research Lab Ltd Apparatus for reading permanently structured magnetic records

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027549A (en) * 1956-06-06 1962-03-27 Ibm Magnetic transducer
DE2035257A1 (de) * 1970-07-16 1972-01-20 Fernseh Gmbh Anordnung zur Wiedergabe von Signalen, welche in einer oder mehreren Spuren auf magnetisierbare Aufzeichnungsträger auf gezeichnet sind
GB2035659B (en) * 1978-11-11 1982-11-10 Emi Ltd Reading secure magnetic documents

Also Published As

Publication number Publication date
EP0658267A1 (en) 1995-06-21
DE69314499T2 (de) 1998-04-23
EP0658267B1 (en) 1997-10-08
AU4580593A (en) 1994-02-14
DE69314499D1 (de) 1997-11-13
KR100271691B1 (ko) 2000-12-01
JPH07509330A (ja) 1995-10-12
WO1994002943A1 (en) 1994-02-03
NZ254215A (en) 1995-12-21
JP3597530B2 (ja) 2004-12-08
AU664476B2 (en) 1995-11-16
CA2141059A1 (en) 1993-07-27
CA2141059C (en) 2003-05-20

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