JPS579187A - Dropout compensating device - Google Patents

Dropout compensating device

Info

Publication number
JPS579187A
JPS579187A JP8290780A JP8290780A JPS579187A JP S579187 A JPS579187 A JP S579187A JP 8290780 A JP8290780 A JP 8290780A JP 8290780 A JP8290780 A JP 8290780A JP S579187 A JPS579187 A JP S579187A
Authority
JP
Japan
Prior art keywords
signal
circuit
dropout
color
frequency conversion
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
JP8290780A
Other languages
Japanese (ja)
Inventor
Katsumi Takeda
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 JP8290780A priority Critical patent/JPS579187A/en
Publication of JPS579187A publication Critical patent/JPS579187A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/87—Regeneration of colour television signals
    • H04N9/88—Signal drop-out compensation

Abstract

PURPOSE:To improve a reproduced image quality, by providing a prevalue holding circuit for a luminance signal system after the Y/C in the video signal is separated. CONSTITUTION:An input FM signal 1 is demodulated at an FM demodulation circuit 2, a video signal A including dropout is inputted to a color signal rejecting circuit 4 consisting of comb-type filters and it becomes a signal B only with the luminance signal. Further, a color signal before frequency conversion is present in the dropout section, and when this signal is inputted to a prevalue holding circuit 3, it is held with a DC voltage immediately before the dropout to become a signal C in which the color signal before remaining conversion of the dropout section is rejected. Further, the signal A becomes the color signal E subjected frequency conversion, via a luminance signal rejection circuit 5 and a color signal frequency conversion circuit 6, consisting of comb-type filters. Further, the signals C and E are added at an addition circuit 7 to obtain a video signal 8 after compensation.
JP8290780A 1980-06-20 1980-06-20 Dropout compensating device Pending JPS579187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8290780A JPS579187A (en) 1980-06-20 1980-06-20 Dropout compensating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8290780A JPS579187A (en) 1980-06-20 1980-06-20 Dropout compensating device

Publications (1)

Publication Number Publication Date
JPS579187A true JPS579187A (en) 1982-01-18

Family

ID=13787319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8290780A Pending JPS579187A (en) 1980-06-20 1980-06-20 Dropout compensating device

Country Status (1)

Country Link
JP (1) JPS579187A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142188A1 (en) * 1983-10-17 1985-05-22 Koninklijke Philips Electronics N.V. Signal-dropout correction circuit for correcting video signals disturbed by signal dropouts
JPS60124185A (en) * 1983-12-08 1985-07-03 Mitsubishi Electric Corp Projection type television receiver
JPH0322480U (en) * 1989-07-13 1991-03-07
JP2903485B2 (en) * 1990-06-29 1999-06-07 イヴァノヴィッチ アルゼニッチ，スヴヤトスラフ Projection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0142188A1 (en) * 1983-10-17 1985-05-22 Koninklijke Philips Electronics N.V. Signal-dropout correction circuit for correcting video signals disturbed by signal dropouts
JPS60124185A (en) * 1983-12-08 1985-07-03 Mitsubishi Electric Corp Projection type television receiver
JPH0322480U (en) * 1989-07-13 1991-03-07
JP2903485B2 (en) * 1990-06-29 1999-06-07 イヴァノヴィッチ アルゼニッチ，スヴヤトスラフ Projection device

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