IT1142108B - Verifica di messaggi registrati - Google Patents

Verifica di messaggi registrati

Info

Publication number
IT1142108B
IT1142108B IT25640/81A IT2564081A IT1142108B IT 1142108 B IT1142108 B IT 1142108B IT 25640/81 A IT25640/81 A IT 25640/81A IT 2564081 A IT2564081 A IT 2564081A IT 1142108 B IT1142108 B IT 1142108B
Authority
IT
Italy
Prior art keywords
verification
registered messages
messages
registered
Prior art date
Application number
IT25640/81A
Other languages
English (en)
Other versions
IT8125640A0 (it
Inventor
Ian Mcwhirter
Richard Bernard Morgan
Original Assignee
Minnesota Mining Mfg Australia
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 Minnesota Mining Mfg Australia filed Critical Minnesota Mining Mfg Australia
Publication of IT8125640A0 publication Critical patent/IT8125640A0/it
Application granted granted Critical
Publication of IT1142108B publication Critical patent/IT1142108B/it

Links

Classifications

    • 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
    • G11B27/3036—Time code signal
    • 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
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/02—Analogue recording or reproducing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
IT25640/81A 1980-12-16 1981-12-16 Verifica di messaggi registrati IT1142108B (it)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
AUPE696280 1980-12-16
AUPE760881 1981-02-13
AUPE771181 1981-02-23
AUPE845881 1981-04-15
AUPE904381 1981-05-27
AUPE969981 1981-07-10
AUPF030981 1981-08-18

Publications (2)

Publication Number Publication Date
IT8125640A0 IT8125640A0 (it) 1981-12-16
IT1142108B true IT1142108B (it) 1986-10-08

Family

ID=27560702

Family Applications (1)

Application Number Title Priority Date Filing Date
IT25640/81A IT1142108B (it) 1980-12-16 1981-12-16 Verifica di messaggi registrati

Country Status (7)

Country Link
US (1) US4477848A (it)
EP (1) EP0067178B1 (it)
CA (1) CA1191603A (it)
IE (1) IE52736B1 (it)
IT (1) IT1142108B (it)
NZ (1) NZ199275A (it)
WO (1) WO1982002111A1 (it)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB8307428D0 (en) * 1983-03-17 1983-04-27 Aruga M Recording and reconstructing digital data
US4734796A (en) * 1983-04-14 1988-03-29 Amiram Grynberg Technique for preventing unauthorized copying of information recorded on a recording medium and a protected recording medium
DE3583737D1 (de) * 1984-07-16 1991-09-12 Mcwhirter Holdings Pty Ltd Kontrollsystem fuer aufgezeichnete informationen.
US4706293A (en) * 1984-08-10 1987-11-10 Minnesota Mining And Manufacturing Company Circuitry for characterizing speech for tamper protected recording
US4823210A (en) * 1984-08-13 1989-04-18 Verbatim Corporation Copy protected disk
AU582216B2 (en) * 1985-03-18 1989-03-16 Minnesota Mining And Manufacturing Company Method of ensuring authenticity of recorded information
US4706282A (en) * 1985-12-23 1987-11-10 Minnesota Mining And Manufacturing Company Decoder for a recorder-decoder system
JPH0789429B2 (ja) * 1986-02-07 1995-09-27 株式会社日立製作所 データ読込み方法
GB8809346D0 (en) * 1988-04-20 1988-05-25 Emi Plc Thorn Improvements relating to marked recorded signals
US5825969A (en) * 1994-02-18 1998-10-20 Hitachi, Ltd. Information management apparatus for inhibiting reproduction in a video cassette recorder
US6091816A (en) * 1995-11-07 2000-07-18 Trimble Navigation Limited Integrated audio recording and GPS system
DE19615301A1 (de) * 1996-04-18 1997-10-23 Deutsche Telekom Ag Verfahren und Vorrichtung zum Aufzeichnen/Verarbeiten von authentischen Bild- und/oder Tondaten
JP3998219B2 (ja) * 1996-06-27 2007-10-24 カシオ計算機株式会社 音声記憶再生装置
US6368331B1 (en) 1999-02-22 2002-04-09 Vtarget Ltd. Method and system for guiding a diagnostic or therapeutic instrument towards a target region inside the patient's body
FR2887350A1 (fr) * 2005-06-21 2006-12-22 France Telecom Procede de securisation d'un contenu stocke sur un support de donnees a partir de la verification d'une signature d'int egrite, programme, dispositif et support correspondants
US11728796B2 (en) * 2020-10-14 2023-08-15 Qorvo Us, Inc. Inverted group delay circuit
US20220115988A1 (en) 2020-10-14 2022-04-14 Qorvo Us, Inc. Power management circuit operable with group delay

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2989595A (en) * 1955-07-05 1961-06-20 Marchant Res Inc Superimposed recording
US3088101A (en) * 1957-11-07 1963-04-30 Honeywell Regulator Co Electrical apparatus for certifying magnetic tape
NL278652A (it) * 1961-05-29
US3591731A (en) * 1968-09-23 1971-07-06 Leigh Prod Inc Method and apparatus for recording real time superimposed on other information
US3723878A (en) * 1970-07-30 1973-03-27 Technical Communications Corp Voice privacy device
DE2448445A1 (de) * 1974-10-10 1976-04-22 Budapesti Radiotechnikai Gyar Vorrichtung zur magnetischen signalaufzeichnung
GB1529566A (en) * 1974-10-16 1978-10-25 Emi Ltd Magnetic recording
US4004089A (en) * 1975-02-28 1977-01-18 Ncr Corporation Programmable cryptic device for enciphering and deciphering data
US4052565A (en) * 1975-05-28 1977-10-04 Martin Marietta Corporation Walsh function signal scrambler
US4040099A (en) * 1975-07-30 1977-08-02 Cook Laboratories, Inc. Method and apparatus for preparing recorded program material to render detectable unauthorized magnetic tape duplications, and method and apparatus for detecting such duplications
US4086634A (en) * 1975-07-30 1978-04-25 Cook Laboratories, Inc. Method and apparatus for preparing recorded program material to prevent unauthorized duplication by magnetic tape recording
CA1069233A (en) * 1977-01-18 1980-01-01 Northern Telecom Limited Telephone hand set transmitter with improved output response
US4126761A (en) * 1977-02-11 1978-11-21 Daniel Graupe Method of and means for processing an audio frequency signal to conceal intelligility
US4193061A (en) * 1978-07-11 1980-03-11 Zoltai John T Electronic authentication system
US4194222A (en) * 1978-08-23 1980-03-18 Minnesota Mining And Manufacturing Company Multitrack recorder including superimposed real time code
FR2459532B1 (fr) * 1979-06-18 1987-07-31 Quadrivium Tech Avancees Procede pour associer une information auxiliaire a une information principale enregistree et application au controle de la reproduction d'information enregistree
US4380029A (en) * 1981-03-13 1983-04-12 Bti Computer Systems Data recording format and method and apparatus for producing same

Also Published As

Publication number Publication date
IT8125640A0 (it) 1981-12-16
EP0067178A1 (en) 1982-12-22
US4477848A (en) 1984-10-16
IE52736B1 (en) 1988-02-03
EP0067178B1 (en) 1986-07-02
IE812950L (en) 1982-06-16
CA1191603A (en) 1985-08-06
NZ199275A (en) 1984-11-09
WO1982002111A1 (en) 1982-06-24
EP0067178A4 (en) 1983-02-09

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