JPH02130164U - - Google Patents
Info
- Publication number
- JPH02130164U JPH02130164U JP3926089U JP3926089U JPH02130164U JP H02130164 U JPH02130164 U JP H02130164U JP 3926089 U JP3926089 U JP 3926089U JP 3926089 U JP3926089 U JP 3926089U JP H02130164 U JPH02130164 U JP H02130164U
- Authority
- JP
- Japan
- Prior art keywords
- image quality
- circuit
- output means
- voltage output
- pass filter
- 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
- 238000010586 diagram Methods 0.000 description 6
Description
第１図は本考案に係るノイズリダクシヨン調整
回路の一実施例を示す回路図、第２図は上記ノイ
ズリダクシヨン調整回路のコアリング動作を説明
する説明図、第３図は従来の画質調整回路を示す
回路図、第４図は第３図の画質調整回路の入出力
輝度信号の帯域特性を示す説明図、第５図は従来
のノイズリダクシヨン回路を示す回路図、第６図
は第５図の回路動作を説明する説明図である。
１１……画質回路、２２……ハイパスフイルタ
ー、２３……ローパスフイルター、２８……加算
器、３１……ノイズリダクシヨン調整回路、３２
……画質調整回路、３３……ノイズリダクシヨン
回路、３５……映像ノイズリダクシヨン回路部、
３６……コアリング回路、ＶＲ１……可変抵抗。
FIG. 1 is a circuit diagram showing an embodiment of the noise reduction adjustment circuit according to the present invention, FIG. 2 is an explanatory diagram illustrating the coring operation of the noise reduction adjustment circuit, and FIG. 3 is a conventional image quality adjustment circuit. 4 is an explanatory diagram showing the band characteristics of input and output luminance signals of the image quality adjustment circuit of FIG. 3, FIG. 5 is a circuit diagram showing a conventional noise reduction circuit, and FIG. 6 is a circuit diagram showing the conventional noise reduction circuit. FIG. 6 is an explanatory diagram illustrating the circuit operation of FIG. 5; 11... Image quality circuit, 22... High pass filter, 23... Low pass filter, 28... Adder, 31... Noise reduction adjustment circuit, 32
...Picture quality adjustment circuit, 33...Noise reduction circuit, 35...Video noise reduction circuit section,
36...coring circuit, VR1...variable resistor.
Claims (1)
段と、 前記直流電圧出力手段と接続し、前記直流電圧
出力手段からの直流電圧に対応して輝度信号の周
波数特性を変化させ、画質調整された輝度信号を
出力する画質回路と、 この画質回路で画質調整された輝度信号の高域
成分を通過させるハイパスフイルターと、 前記画質回路で画質調整された輝度信号の低域
成分を通過させるローパスフイルタートと、 前記直流電圧出力手段と接続し、前記ハイパス
フイルターからの高域信号を入力し前記直流電圧
出力手段からの直流電圧に対応してコアリング幅
を変化させ、コアリングされた高域信号を出力す
るコアリング回路と、 一方の入力端には前記コアリング回路からの高
域信号を所定のレベルに増幅して入力し、他方の
入力端には前記ローパスフイルターからの低域信
号を入力し、前記２つの信号を加算して、画質調
整及びノイズ除去した輝度信号を出力する加算回
路とを具備したことを特徴とするノイズリダクシ
ヨン調整回路。[Claims for Utility Model Registration] DC voltage output means for outputting an adjustable DC voltage; and a DC voltage output means connected to the DC voltage output means to adjust the frequency characteristics of a luminance signal in response to the DC voltage from the DC voltage output means. an image quality circuit that outputs a luminance signal whose image quality has been adjusted by changing the image quality, a high-pass filter that passes the high frequency component of the luminance signal whose image quality has been adjusted by the image quality circuit, and a low frequency component of the luminance signal whose image quality has been adjusted by the image quality circuit. A low-pass filter that passes the component is connected to the DC voltage output means, and a high-frequency signal from the high-pass filter is inputted to change the coring width in response to the DC voltage from the DC voltage output means. a coring circuit that outputs a high-frequency signal from the coring circuit; one input terminal amplifies the high-frequency signal from the coring circuit to a predetermined level, and the other input terminal receives the high-frequency signal from the low-pass filter; 1. A noise reduction adjustment circuit comprising: an addition circuit which inputs a low frequency signal, adds the two signals, and outputs a luminance signal from which image quality has been adjusted and noise has been removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3926089U JPH02130164U (en) | 1989-04-04 | 1989-04-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3926089U JPH02130164U (en) | 1989-04-04 | 1989-04-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02130164U true JPH02130164U (en) | 1990-10-26 |
Family
ID=31548013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3926089U Pending JPH02130164U (en) | 1989-04-04 | 1989-04-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02130164U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04354477A (en) * | 1991-05-31 | 1992-12-08 | Sharp Corp | Picture quality correction device |
-
1989
- 1989-04-04 JP JP3926089U patent/JPH02130164U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04354477A (en) * | 1991-05-31 | 1992-12-08 | Sharp Corp | Picture quality correction device |
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