JPS647894A - Digital drop out compensating circuit - Google Patents
Digital drop out compensating circuitInfo
- 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
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.
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5627592A (en) * | 1979-08-13 | 1981-03-17 | Nec Corp | Dropout correction unit |
-
1987
- 1987-06-30 JP JP62163415A patent/JPS647894A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5627592A (en) * | 1979-08-13 | 1981-03-17 | Nec Corp | Dropout correction unit |
Cited By (1)
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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