JPH0436373U - - Google Patents
Info
- Publication number
- JPH0436373U JPH0436373U JP7821690U JP7821690U JPH0436373U JP H0436373 U JPH0436373 U JP H0436373U JP 7821690 U JP7821690 U JP 7821690U JP 7821690 U JP7821690 U JP 7821690U JP H0436373 U JPH0436373 U JP H0436373U
- Authority
- JP
- Japan
- Prior art keywords
- contour
- signal
- contour signal
- compensation circuit
- detection means
- 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 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Picture Signal Circuits (AREA)
- Studio Circuits (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案を用いた輪郭補償回路の全体構
成を示すブロツク図、第２図は本考案の振幅検波
回路の一実施例を示す回路図である。
ＤＬ−１Ａ，ＤＬ−１Ｂ，ＤＬ−２，ＤＬ−３
Ａ，ＤＬ−３Ｂ……遅延回路、Ａ１，Ａ５，Ａ６
，Ａ７……増幅器、Ａ２，Ａ３……差動増幅器、
５……小振幅除去回路、７……振幅検波回路。
FIG. 1 is a block diagram showing the overall configuration of a contour compensation circuit using the present invention, and FIG. 2 is a circuit diagram showing an embodiment of the amplitude detection circuit of the present invention. DL-1A, DL-1B, DL-2, DL-3
A, DL-3B...Delay circuit, A1, A5, A6
, A7...Amplifier, A2, A3...Differential amplifier,
5...small amplitude removal circuit, 7... amplitude detection circuit.
Claims (1)
郭信号発生器と、該輪郭信号発生器からの出力信
号と前記映像信号とを混合する混合器からなる輪
郭補償回路において、前記輪郭信号の振幅を検出
する手段と、前記輪郭信号の利得を制御する手段
を有し、前記輪郭信号の振幅検出手段の時定数を
前記映像信号のフイールド周期より十分長く、１
秒より十分短く設定し、該輪郭信号の振幅検出手
段出力によつて前記輪郭信号の利得制御手段を制
御する構成としたことを特徴とする輪郭補償回路
。 Detecting the amplitude of the contour signal in a contour compensation circuit comprising a contour signal generator that generates a contour signal from an input video signal, and a mixer that mixes the output signal from the contour signal generator and the video signal. and means for controlling the gain of the contour signal, the time constant of the contour signal amplitude detection means being sufficiently longer than the field period of the video signal,
A contour compensation circuit characterized in that the contour signal is set sufficiently shorter than seconds, and the contour signal gain control means is controlled by the output of the contour signal amplitude detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7821690U JPH0436373U (en) | 1990-07-25 | 1990-07-25 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7821690U JPH0436373U (en) | 1990-07-25 | 1990-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0436373U true JPH0436373U (en) | 1992-03-26 |
Family
ID=31621293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7821690U Pending JPH0436373U (en) | 1990-07-25 | 1990-07-25 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0436373U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60199270A (en) * | 1984-03-23 | 1985-10-08 | Mitsubishi Electric Corp | Profile correcting device of video signal |
| JPS61201576A (en) * | 1985-02-19 | 1986-09-06 | アールシーエー トムソン ライセンシング コーポレーシヨン | Peaking processor |
-
1990
- 1990-07-25 JP JP7821690U patent/JPH0436373U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60199270A (en) * | 1984-03-23 | 1985-10-08 | Mitsubishi Electric Corp | Profile correcting device of video signal |
| JPS61201576A (en) * | 1985-02-19 | 1986-09-06 | アールシーエー トムソン ライセンシング コーポレーシヨン | Peaking processor |