JPS647894A - Digital drop out compensating circuit - Google Patents

Digital drop out compensating circuit

Info

Publication number
JPS647894A
JPS647894A JP62163415A JP16341587A JPS647894A JP S647894 A JPS647894 A JP S647894A JP 62163415 A JP62163415 A JP 62163415A JP 16341587 A JP16341587 A JP 16341587A JP S647894 A JPS647894 A JP S647894A
Authority
JP
Japan
Prior art keywords
video signal
output
circuit
delaying
carrier
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
JP62163415A
Other languages
Japanese (ja)
Inventor
Mitsuo Hirose
Shusuke Magara
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric Co 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP62163415A priority Critical patent/JPS647894A/en
Publication of JPS647894A publication Critical patent/JPS647894A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To obtain a good picture by delaying the input digital video signal of an NTSC system approximately by a half cycle of a chrominance sub-carrier from one horizontal synchronizing period, delaying half the cycle of the chrominance sub-carrier, and switching an output obtained by adding and averaging them and the input digital video signal. CONSTITUTION:The titled circuit is provided with a digital delay circuit 13 for delaying the input digital video signal of the NTSC system approximately by half the cycle of the chrominance sub-carrier from the one horizontal synchronizing period, a dot shift circuit 17 for delaying the output of the digital delay circuit approximately half the cycle of the chrominance sub-carrier, an adder 19 for adding and averaging the output of the digital delay circuit and the output of the dot shift circuit 17 and a switching circuit 12 for switching the output of the adder 19 and the input digital video signal. Thereby, at the time of compensating the drop out of the video signal by the delay means 13, a geometric distortion generated in the compensating part can be reduced.
JP62163415A 1987-06-30 1987-06-30 Digital drop out compensating circuit Pending JPS647894A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62163415A JPS647894A (en) 1987-06-30 1987-06-30 Digital drop out compensating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62163415A JPS647894A (en) 1987-06-30 1987-06-30 Digital drop out compensating circuit

Publications (1)

Publication Number Publication Date
JPS647894A true JPS647894A (en) 1989-01-11

Family

ID=15773461

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62163415A Pending JPS647894A (en) 1987-06-30 1987-06-30 Digital drop out compensating circuit

Country Status (1)

Country Link
JP (1) JPS647894A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9802671B2 (en) 2005-06-27 2017-10-31 Campagnolo S.R.L. Control device for a bicycle derailleur

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627592A (en) * 1979-08-13 1981-03-17 Nec Corp Dropout correction unit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5627592A (en) * 1979-08-13 1981-03-17 Nec Corp Dropout correction unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9802671B2 (en) 2005-06-27 2017-10-31 Campagnolo S.R.L. Control device for a bicycle derailleur

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