JPH025986U - - Google Patents
Info
- Publication number
- JPH025986U JPH025986U JP8393188U JP8393188U JPH025986U JP H025986 U JPH025986 U JP H025986U JP 8393188 U JP8393188 U JP 8393188U JP 8393188 U JP8393188 U JP 8393188U JP H025986 U JPH025986 U JP H025986U
- Authority
- JP
- Japan
- Prior art keywords
- diode
- color
- fixed bias
- series
- color difference
- 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
Landscapes
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案による色信号再生回路の一実施
例を示すブロツク構成図、第２図は実施例の動作
における色相ベクトル図、第３図は従来における
色信号再生回路を示すブロツク構成図である。
７Ａ，７Ｂ……非線形回路、ＶＲ３，ＶＲ４…
…可変ボリウム、Ｄ１，Ｄ２……ダイオード、Ｖ
１，Ｖ２……固定バイアス。
FIG. 1 is a block diagram showing an embodiment of the color signal reproducing circuit according to the present invention, FIG. 2 is a hue vector diagram in the operation of the embodiment, and FIG. 3 is a block diagram showing a conventional color signal reproducing circuit. be. 7A, 7B...Nonlinear circuit, VR 3 , VR 4 ...
...variable volume, D 1 , D 2 ... diode, V
1 , V2 ...Fixed bias.
Claims (1)
線形処理を行う可変ボリウムＶＲ３とダイオード
Ｄ１と固定バイアスＶ１とが直列接続され、上記
ダイオードＤ１が上記固定バイアスＶ１により逆
バイアスされた非線形回路７Ａと、 色復調して得た色差信号（Ｂ―Ｙ）に対する非
線形処理を行う可変ボリウムＶＲ４とダイオード
Ｄ２と固定バイアスＶ２とが直列接続され、上記
ダイオードＤ２が上記固定バイアスＶ２により順
バイアスされた非線形回路７Ｂとを備え、 上記色差信号（Ｒ―Ｙ），（Ｂ―Ｙ）に対する
減衰レベルをそれぞれ上記固定バイアスＶ１，Ｖ
２に固定し、肌色に対する再現性を変えることな
く最適な状態に保つたまま、肌色以外の色に対す
る飽和度および色相を可変できるようにしたこと
を特徴とする色信号再生回路。[Claims for Utility Model Registration] A variable volume VR 3 that performs nonlinear processing on a color difference signal (RY) obtained by color demodulation, a diode D 1 , and a fixed bias V 1 are connected in series, and the diode D 1 is connected in series. A nonlinear circuit 7A reverse biased by the fixed bias V1 , a variable volume VR4 that performs nonlinear processing on the color difference signal (BY) obtained by color demodulation, a diode D2 , and a fixed bias V2 are connected in series. and a nonlinear circuit 7B in which the diode D2 is forward biased by the fixed bias V2 , and the attenuation level for the color difference signals (RY) and (BY) is adjusted by the fixed biases V1 and V, respectively.
2 , and the saturation level and hue of colors other than the skin color can be varied while maintaining the optimum state without changing the reproducibility of the skin color.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8393188U JPH025986U (en) | 1988-06-27 | 1988-06-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8393188U JPH025986U (en) | 1988-06-27 | 1988-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH025986U true JPH025986U (en) | 1990-01-16 |
Family
ID=31308635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8393188U Pending JPH025986U (en) | 1988-06-27 | 1988-06-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH025986U (en) |
-
1988
- 1988-06-27 JP JP8393188U patent/JPH025986U/ja active Pending
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