GB1551070A - Dropout detector circuit - Google Patents

Dropout detector circuit

Info

Publication number
GB1551070A
GB1551070A GB2719276A GB2719276A GB1551070A GB 1551070 A GB1551070 A GB 1551070A GB 2719276 A GB2719276 A GB 2719276A GB 2719276 A GB2719276 A GB 2719276A GB 1551070 A GB1551070 A GB 1551070A
Authority
GB
United Kingdom
Prior art keywords
input
threshold device
signal
supplied
amplifier
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
GB2719276A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1551070A publication Critical patent/GB1551070A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

The signal read from a recording carrier, particularly the video signal, is supplied to the input of an amplifier (19). The output of the amplifier is connected via a filter (20), a rectifier arrangement (21) and a low-pass filter (22) to a first input of a threshold device (23) constructed as Schmitt trigger. A second input of the threshold device is also supplied with the signal from the output of the amplifier via a rectifier arrangement (26) acting as amplitude detector and a further low-pass filter (27). When the ratio between the amplitude of the signal supplied to the first input of the threshold device and the amplitude of the signal supplied to the second input of the threshold device has dropped to a particular value, the threshold device generates a switching signal. This indicates that dropout interference is present. <IMAGE>
GB2719276A 1975-07-03 1976-06-30 Dropout detector circuit Expired GB1551070A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT512475A AT337269B (en) 1975-07-03 1975-07-03 CIRCUIT ARRANGEMENT FOR A DROPOUT DETECTOR

Publications (1)

Publication Number Publication Date
GB1551070A true GB1551070A (en) 1979-08-22

Family

ID=3572178

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2719276A Expired GB1551070A (en) 1975-07-03 1976-06-30 Dropout detector circuit

Country Status (12)

Country Link
JP (1) JPS528810A (en)
AR (1) AR209661A1 (en)
AT (1) AT337269B (en)
AU (1) AU509584B2 (en)
BE (1) BE843698A (en)
CA (1) CA1070012A (en)
CH (1) CH608673A5 (en)
DE (1) DE2627547C2 (en)
ES (1) ES449499A1 (en)
FR (1) FR2316809A1 (en)
GB (1) GB1551070A (en)
IT (1) IT1066920B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893192A (en) * 1987-03-17 1990-01-09 Pioneer Electronic Corporation Video signal drop-out corrector circuit responsive to level of luminance component of the signal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2008888B (en) * 1977-10-27 1982-06-30 Quantel Ltd Drop-out compensation system
EP0283281B1 (en) * 1987-02-23 1993-02-03 Pioneer Electronic Corporation Drop-out compensator circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3366732A (en) * 1961-07-10 1968-01-30 Minnesota Mining & Mfg Electronic dropout suppressor having autoamtic phase control
US3333063A (en) * 1962-10-01 1967-07-25 Ampex Signal demodulating and combining circuit for wideband reproducing systems
US3328521A (en) * 1963-07-15 1967-06-27 Minnesota Mining & Mfg Dropout compensator for video signals
US3461230A (en) * 1965-11-10 1969-08-12 Minnesota Mining & Mfg Dropout compensator with delayed response
US3536994A (en) * 1968-03-28 1970-10-27 Minnesota Mining & Mfg Dropout counter with continuous integration and moving counting period

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893192A (en) * 1987-03-17 1990-01-09 Pioneer Electronic Corporation Video signal drop-out corrector circuit responsive to level of luminance component of the signal

Also Published As

Publication number Publication date
AT337269B (en) 1977-06-27
AR209661A1 (en) 1977-05-13
ES449499A1 (en) 1978-01-16
DE2627547A1 (en) 1977-01-27
CA1070012A (en) 1980-01-15
AU1549376A (en) 1978-01-05
CH608673A5 (en) 1979-01-15
FR2316809B1 (en) 1980-01-25
BE843698A (en) 1977-01-03
ATA512475A (en) 1976-10-15
JPS528810A (en) 1977-01-24
AU509584B2 (en) 1980-05-15
FR2316809A1 (en) 1977-01-28
DE2627547C2 (en) 1981-11-26
IT1066920B (en) 1985-03-12

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee