JPS5758482A - Dropout compensation circuit - Google Patents

Dropout compensation circuit

Info

Publication number
JPS5758482A
JPS5758482A JP55132913A JP13291380A JPS5758482A JP S5758482 A JPS5758482 A JP S5758482A JP 55132913 A JP55132913 A JP 55132913A JP 13291380 A JP13291380 A JP 13291380A JP S5758482 A JPS5758482 A JP S5758482A
Authority
JP
Japan
Prior art keywords
switch
dropout
delay
output
signal preceding
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.)
Pending
Application number
JP55132913A
Other languages
Japanese (ja)
Inventor
Noboru Kojima
Koichi Hirose
Akira Shibata
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55132913A priority Critical patent/JPS5758482A/en
Publication of JPS5758482A publication Critical patent/JPS5758482A/en
Pending 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

PURPOSE:To completely compensate transient noise generated at the start or end of dropout compensation, by changing over an FM switch for the compensation of dropout and dropout noise generated at the start of dropout generation. CONSTITUTION:At the generation of dropout, a pulse 17 is generated from a pulser 5 immediately and an FM switch 6, hysteresis circuit 15 and video switch 14 are driven. Thus, an FM signal preceding by 1H from a 1H delay line 8 is introduced to the output of the switch 6, and the video signal preceding by 1H is given to the output of the switch 14 from an FM demodulation circuit 10. At the end of dropout the output of the switch 14 is switched to the video signal preceding by 1H after the delay of rd2+rd3. The switch 6 is switched after rdd delay, and noise of this switching passes through an FM demodulator and enters the switch 14 with a delay of about 0.5-1.0mus. Thus, the noise due to switch 6 is removed by making the rd3 to >=1.0mus.
JP55132913A 1980-09-26 1980-09-26 Dropout compensation circuit Pending JPS5758482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55132913A JPS5758482A (en) 1980-09-26 1980-09-26 Dropout compensation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55132913A JPS5758482A (en) 1980-09-26 1980-09-26 Dropout compensation circuit

Publications (1)

Publication Number Publication Date
JPS5758482A true JPS5758482A (en) 1982-04-08

Family

ID=15092445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55132913A Pending JPS5758482A (en) 1980-09-26 1980-09-26 Dropout compensation circuit

Country Status (1)

Country Link
JP (1) JPS5758482A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221807A (en) * 1983-05-31 1984-12-13 Canon Inc Fm modulating signal reproducing device
JPS59221808A (en) * 1983-05-31 1984-12-13 Canon Inc Fm modulating signal reproducing device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59221807A (en) * 1983-05-31 1984-12-13 Canon Inc Fm modulating signal reproducing device
JPS59221808A (en) * 1983-05-31 1984-12-13 Canon Inc Fm modulating signal reproducing device
JPH0466071B2 (en) * 1983-05-31 1992-10-22 Canon Kk
JPH0466072B2 (en) * 1983-05-31 1992-10-22 Canon Kk

Similar Documents

Publication Publication Date Title
JPS54106161A (en) Switch circuit
JPS5758482A (en) Dropout compensation circuit
ATE40026T1 (en) LOSS CORRECTION CIRCUIT FOR CORRECTING VIDEO SIGNALS DISTURBED BY LOSSES.
JPS5483718A (en) Improvement unit for picture quality
JPS579182A (en) Signal source switching device for television picture receiver
JPS5417623A (en) Scanning-speed modulator circuit
JPS5640371A (en) Drop-out compensating unit
JPS5763964A (en) Aural switch circuit
JPS5339048A (en) Delay circuit
JPS647813A (en) Automatic threshold level setting circuit
JPS57104382A (en) Ghost rejecting device for television receiver
JPS5783983A (en) Magnetic recorder and reproducer
JPS5274220A (en) Contour compensating unit
JPS53144624A (en) Signal processing system
JPS5391529A (en) Color television picture receiver
JPS572109A (en) Automatic gain control circuit
JPS5563186A (en) Television picture receiver
JPS57204692A (en) Delaying device
JPS52132722A (en) Solid state pick up unit
JPS54142926A (en) Sound reproducer
JPS5528645A (en) Compensation circuit for deficient noise
JPS5436121A (en) Generator of still picture signal
JPS53141565A (en) A-d converter circuit
JPS5397810A (en) Drop-out compensating system
JPS57184336A (en) Fm receiver