JPS6437179A - Digital video camera - Google Patents
Digital video cameraInfo
- Publication number
- JPS6437179A JPS6437179A JP62193011A JP19301187A JPS6437179A JP S6437179 A JPS6437179 A JP S6437179A JP 62193011 A JP62193011 A JP 62193011A JP 19301187 A JP19301187 A JP 19301187A JP S6437179 A JPS6437179 A JP S6437179A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- optical black
- adder
- converter
- black level
- 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
- 230000003287 optical effect Effects 0.000 abstract 4
- 238000012545 processing Methods 0.000 abstract 2
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 abstract 1
Landscapes
- Picture Signal Circuits (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
PURPOSE:To prevent the degradation of the quality of a video signal because of the fluctuation in optical black level by detecting the optical black level, holding the detected value during one horizontal cycle, then adding/subtracting to/from a subsequent signal level. CONSTITUTION:A signal from a CCD 1 is inputted to an adder 10 and an optical black detection/memory part 13 through an analog processing circuit 8 and an A/D converter 9. The part 13 detects an optical black level and holds it during one horizontal cycle. Thus held value is inputted to the adder 10 and added/subtracted to/from an output from the A/D converter 10. The output from the adder 10 is subjected to such as gamma, clipping, and synchronizing- signal-adding processings in a ROM part 11, and outputted via an A/D converter 12 as an NTSC signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193011A JPS6437179A (en) | 1987-08-01 | 1987-08-01 | Digital video camera |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62193011A JPS6437179A (en) | 1987-08-01 | 1987-08-01 | Digital video camera |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6437179A true JPS6437179A (en) | 1989-02-07 |
Family
ID=16300710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62193011A Pending JPS6437179A (en) | 1987-08-01 | 1987-08-01 | Digital video camera |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6437179A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008109264A (en) * | 2006-10-24 | 2008-05-08 | Sony Corp | Solid state imaging device and imaging apparatus |
-
1987
- 1987-08-01 JP JP62193011A patent/JPS6437179A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008109264A (en) * | 2006-10-24 | 2008-05-08 | Sony Corp | Solid state imaging device and imaging apparatus |
US8269863B2 (en) | 2006-10-24 | 2012-09-18 | Sony Corporation | Solid-state image pickup device and image pickup apparatus |
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