CA1056944A - Method of detecting alterations in signals corresponding to the read-out of a data carrier and system for implementing such a method - Google Patents

Method of detecting alterations in signals corresponding to the read-out of a data carrier and system for implementing such a method

Info

Publication number
CA1056944A
CA1056944A CA231,990A CA231990A CA1056944A CA 1056944 A CA1056944 A CA 1056944A CA 231990 A CA231990 A CA 231990A CA 1056944 A CA1056944 A CA 1056944A
Authority
CA
Canada
Prior art keywords
signal
read
circuit
monostable circuit
output
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
Application number
CA231,990A
Other languages
English (en)
French (fr)
Inventor
Rene Romeas
Pierre Oprandi
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Application granted granted Critical
Publication of CA1056944A publication Critical patent/CA1056944A/en
Expired 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • 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
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/94—Signal drop-out compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
CA231,990A 1974-07-23 1975-07-22 Method of detecting alterations in signals corresponding to the read-out of a data carrier and system for implementing such a method Expired CA1056944A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7425492A FR2280168A1 (fr) 1974-07-23 1974-07-23 Procede de detection d'alteration de signaux de lecture d'information enregistree sur un support et appareil mettant en oeuvre un tel procede

Publications (1)

Publication Number Publication Date
CA1056944A true CA1056944A (en) 1979-06-19

Family

ID=9141583

Family Applications (1)

Application Number Title Priority Date Filing Date
CA231,990A Expired CA1056944A (en) 1974-07-23 1975-07-22 Method of detecting alterations in signals corresponding to the read-out of a data carrier and system for implementing such a method

Country Status (6)

Country Link
US (1) US4006295A (US06229276-20010508-P00022.png)
JP (1) JPS5177209A (US06229276-20010508-P00022.png)
CA (1) CA1056944A (US06229276-20010508-P00022.png)
DE (1) DE2532771A1 (US06229276-20010508-P00022.png)
FR (1) FR2280168A1 (US06229276-20010508-P00022.png)
GB (1) GB1513825A (US06229276-20010508-P00022.png)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1536851A (en) * 1975-03-10 1978-12-20 Rca Corp Video carrier wave defect detection and compensation
JPS53114608A (en) * 1977-03-16 1978-10-06 Matsushita Electric Ind Co Ltd Defect detector
JPS5757025A (en) * 1980-09-24 1982-04-06 Sony Corp Waveform converting circuit
JPS60219679A (ja) * 1984-04-13 1985-11-02 Mitsubishi Electric Corp 情報記録装置
US5058093A (en) * 1986-01-27 1991-10-15 Matsushita Electric Industrial Co., Ltd. Signal level deviation detecting apparatus
EP0283281B1 (en) * 1987-02-23 1993-02-03 Pioneer Electronic Corporation Drop-out compensator circuit
JPH054372Y2 (US06229276-20010508-P00022.png) * 1987-03-17 1993-02-03
JPH02137595A (ja) * 1988-11-18 1990-05-25 Sony Corp ドロップアウトの検出回路

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3080487A (en) * 1959-07-06 1963-03-05 Thompson Ramo Wooldridge Inc Timing signal generator
US3071723A (en) * 1960-05-03 1963-01-01 Potter Instrument Co Inc Device for detecting defects in magnetic tape
FR1332809A (fr) * 1961-07-10 1963-07-19 Minnesota Mining & Mfg Antiparasite électronique pour chutes de tension
FR1402254A (fr) * 1963-07-15 1965-06-11 Minnesota Mining & Mfg Dispositif destiné à corriger les défaillances passagères d'un signal récurrent, et ses applications notamment à la reproduction des signaux télévisés
US3461230A (en) * 1965-11-10 1969-08-12 Minnesota Mining & Mfg Dropout compensator with delayed response
US3474418A (en) * 1967-06-19 1969-10-21 Ibm Data tracking system
US3865981A (en) * 1973-07-16 1975-02-11 Odetics Inc Clock signal assurance in digital data communication systems
NL7310869A (nl) * 1973-08-07 1975-02-11 Philips Nv Inrichting voor het weergeven van een op een registratiedrager opgetekend videosignaal.
NL7402014A (nl) * 1974-02-14 1975-08-18 Philips Nv Inrichting voor het detekteren van signaaluit- vallen.
US3909518A (en) * 1974-06-06 1975-09-30 Rca Corp Signal switching apparatus for compensating record defects
US3925605A (en) * 1974-06-28 1975-12-09 Zenith Radio Corp Dropout detector for video disc playback
US3947873A (en) * 1974-09-19 1976-03-30 Basf Aktiengesellschaft Method and circuit for detecting and compensating for drop-out and distortion of frequency modulated video signals

Also Published As

Publication number Publication date
FR2280168B1 (US06229276-20010508-P00022.png) 1979-04-27
GB1513825A (en) 1978-06-14
DE2532771A1 (de) 1976-02-12
FR2280168A1 (fr) 1976-02-20
US4006295A (en) 1977-02-01
JPS5177209A (en) 1976-07-05

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