JPH0249277U - - Google Patents
Info
- Publication number
- JPH0249277U JPH0249277U JP12933188U JP12933188U JPH0249277U JP H0249277 U JPH0249277 U JP H0249277U JP 12933188 U JP12933188 U JP 12933188U JP 12933188 U JP12933188 U JP 12933188U JP H0249277 U JPH0249277 U JP H0249277U
- Authority
- JP
- Japan
- Prior art keywords
- gamma correction
- luminance signal
- white peak
- signal
- circuit
- 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 3
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Picture Signal Circuits (AREA)
Description
第１図はこの考案に係るダイナミツクガンマ補
正回路の一例を示す構成図、第２図はこれに使用
される白ピーク検出回路の一例を示す接続図、第
３図はガンマ補正動作の説明に供する波形図、第
４図はガンマ補正回路の従来例を示す構成図、第
５図はその動作説明に供する波形図である。
１０……ガンマ補正回路、１２……コントラス
ト調整回路、１３……ブライト調整回路、２０，
５０……ガンマ補正部、３０……ダイナミツクガ
ンマ補正回路、３２……クランプ回路、４０……
白ピーク検出回路、４５……直流制御信号形成手
段、４６……ピークホールド回路、Ｌγ……ガン
マ補正レベル、Ｌｂ……ブルーミング輝度レベル
。
Fig. 1 is a configuration diagram showing an example of a dynamic gamma correction circuit according to this invention, Fig. 2 is a connection diagram showing an example of a white peak detection circuit used in this, and Fig. 3 is an explanation of gamma correction operation. FIG. 4 is a configuration diagram showing a conventional example of a gamma correction circuit, and FIG. 5 is a waveform diagram for explaining its operation. 10... Gamma correction circuit, 12... Contrast adjustment circuit, 13... Bright adjustment circuit, 20,
50... Gamma correction section, 30... Dynamic gamma correction circuit, 32... Clamp circuit, 40...
White peak detection circuit, 45... DC control signal forming means, 46... Peak hold circuit, Lγ... Gamma correction level, Lb... Blooming brightness level.
Claims (1)
号を出力する白ピーク検出回路と、 直流再生された輝度信号をガンマ補正するガン
マ補正部とを有し、 上記直流制御信号によつてガンマ補正レベルを
可変して輝度信号の圧縮量を可変するようにした
ことを特徴とするダイナミツクガンマ補正回路。[Claims for Utility Model Registration] A white peak detection circuit that outputs a DC control signal according to the white peak level of a luminance signal, and a gamma correction section that performs gamma correction on the DC-regenerated luminance signal, A dynamic gamma correction circuit characterized in that the amount of compression of a luminance signal is varied by varying the gamma correction level depending on the signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12933188U JPH0249277U (en) | 1988-09-30 | 1988-09-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12933188U JPH0249277U (en) | 1988-09-30 | 1988-09-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0249277U true JPH0249277U (en) | 1990-04-05 |
Family
ID=31383511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12933188U Pending JPH0249277U (en) | 1988-09-30 | 1988-09-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0249277U (en) |
-
1988
- 1988-09-30 JP JP12933188U patent/JPH0249277U/ja active Pending