GB1220103A - Comparison discrepancy indicator for records - Google Patents

Comparison discrepancy indicator for records

Info

Publication number
GB1220103A
GB1220103A GB06452/68A GB1645268A GB1220103A GB 1220103 A GB1220103 A GB 1220103A GB 06452/68 A GB06452/68 A GB 06452/68A GB 1645268 A GB1645268 A GB 1645268A GB 1220103 A GB1220103 A GB 1220103A
Authority
GB
United Kingdom
Prior art keywords
copy
master
signal
subchannels
records
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
GB06452/68A
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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 Bell and Howell Co filed Critical Bell and Howell Co
Publication of GB1220103A publication Critical patent/GB1220103A/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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing

Landscapes

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
GB06452/68A 1967-04-07 1968-04-05 Comparison discrepancy indicator for records Expired GB1220103A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US62931767A 1967-04-07 1967-04-07

Publications (1)

Publication Number Publication Date
GB1220103A true GB1220103A (en) 1971-01-20

Family

ID=24522483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB06452/68A Expired GB1220103A (en) 1967-04-07 1968-04-05 Comparison discrepancy indicator for records

Country Status (9)

Country Link
US (1) US3551608A (cg-RX-API-DMAC10.html)
AT (1) AT302684B (cg-RX-API-DMAC10.html)
BE (1) BE713360A (cg-RX-API-DMAC10.html)
CH (1) CH486093A (cg-RX-API-DMAC10.html)
DE (1) DE1772155C2 (cg-RX-API-DMAC10.html)
FR (1) FR1565752A (cg-RX-API-DMAC10.html)
GB (1) GB1220103A (cg-RX-API-DMAC10.html)
NL (1) NL6804934A (cg-RX-API-DMAC10.html)
SE (1) SE336923B (cg-RX-API-DMAC10.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805284A (en) * 1972-09-18 1974-04-16 Burroughs Corp Digital data copy duplication method and apparatus utilizing bit to bit data verification
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
DE3150061A1 (de) * 1981-12-17 1983-06-23 Polygram Gmbh, 2000 Hamburg Verfahren zur ermittlung von stoerimpulsen bei auf tontraegern aufgezeichneten signalen
US4746991A (en) * 1982-01-12 1988-05-24 Discovision Associates Recording characteristic evaluation of a recording medium with a time sequence of test signals
EP0111010B1 (en) * 1982-06-04 1989-08-16 Sony Corporation Optical disc reproducer
US4638378A (en) * 1984-06-12 1987-01-20 Arrigo Zanessi Fidelity control during operation of duplicator machines
US4823210A (en) * 1984-08-13 1989-04-18 Verbatim Corporation Copy protected disk

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2774056A (en) * 1954-04-12 1956-12-11 Loew S Inc Comparator device

Also Published As

Publication number Publication date
AT302684B (de) 1972-10-25
CH486093A (fr) 1970-02-15
NL6804934A (cg-RX-API-DMAC10.html) 1968-10-08
BE713360A (cg-RX-API-DMAC10.html) 1968-08-16
SE336923B (cg-RX-API-DMAC10.html) 1971-07-19
DE1772155C2 (de) 1973-01-04
FR1565752A (cg-RX-API-DMAC10.html) 1969-05-02
DE1772155B1 (de) 1972-06-08
US3551608A (en) 1970-12-29

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