JPH0369986U - - Google Patents
Info
- Publication number
- JPH0369986U JPH0369986U JP12717089U JP12717089U JPH0369986U JP H0369986 U JPH0369986 U JP H0369986U JP 12717089 U JP12717089 U JP 12717089U JP 12717089 U JP12717089 U JP 12717089U JP H0369986 U JPH0369986 U JP H0369986U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- blue
- level
- red
- detection output
- 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
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図は、本考案のホワイトバランス補正回路
のブロツク図、第２図は従来のホワイトバランス
補正回路のブロツク図である。
１……利得制御回路、２……プロセス回路、３
……ホワイトクリツプ回路、４……ピーク検波回
路、５……減算器、６……増幅器、７……レベル
検出器、８……レベル切換回路。
FIG. 1 is a block diagram of a white balance correction circuit according to the present invention, and FIG. 2 is a block diagram of a conventional white balance correction circuit. 1... Gain control circuit, 2... Process circuit, 3
... White clip circuit, 4 ... Peak detection circuit, 5 ... Subtractor, 6 ... Amplifier, 7 ... Level detector, 8 ... Level switching circuit.
Claims (1)
色信号のピーク検波出力を基準値として、赤色信
号のピーク検波出力および青色信号のピーク検波
出力とレベル比較を行ない、前記基準値と赤色信
号のピーク値、および青色信号のピーク値が同一
レベルになるように、各々赤色チヤンネルの利得
制御および青色チヤンネルの利得制御を行なう、
白バランス補正回路において、赤色信号、緑色信
号、青色信号のいずれかの信号が規定レベルを越
えたことを検出するレベル検出器と、このレベル
検出器の検出信号により、その時の対応する赤色
信号、緑色信号、青色信号のレベルを所定レベル
以下に低減するレベル切換回路を付加した構成と
したことを特徴とするホワイトバランス補正回路
。 The peak detection output of the green signal of the video signals of the red signal, green signal, and blue signal is used as a reference value, and the level is compared with the peak detection output of the red signal and the peak detection output of the blue signal, and the peak detection output of the red signal is compared with the reference value. gain control of the red channel and the blue channel so that the peak value and the peak value of the blue signal are at the same level, respectively.
In the white balance correction circuit, there is a level detector that detects when any of the red, green, and blue signals exceeds a specified level, and the detection signal of this level detector detects the corresponding red signal at that time. A white balance correction circuit characterized in that it has a configuration in which a level switching circuit is added to reduce the levels of a green signal and a blue signal to below a predetermined level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12717089U JPH0369986U (en) | 1989-11-01 | 1989-11-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12717089U JPH0369986U (en) | 1989-11-01 | 1989-11-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0369986U true JPH0369986U (en) | 1991-07-12 |
Family
ID=31674944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12717089U Pending JPH0369986U (en) | 1989-11-01 | 1989-11-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0369986U (en) |
-
1989
- 1989-11-01 JP JP12717089U patent/JPH0369986U/ja active Pending
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