JPS6365364U - - Google Patents
Info
- Publication number
- JPS6365364U JPS6365364U JP16028586U JP16028586U JPS6365364U JP S6365364 U JPS6365364 U JP S6365364U JP 16028586 U JP16028586 U JP 16028586U JP 16028586 U JP16028586 U JP 16028586U JP S6365364 U JPS6365364 U JP S6365364U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- amplitude
- limiter
- input
- 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 7
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Picture Signal Circuits (AREA)
- Television Signal Processing For Recording (AREA)
Description
第１図および第２図はこの考案の画質補償回路
の実施例を示し、第１図は１実施例のブロツク図
、第２図は他の実施例のブロツク図、第３図は従
来の画質補償回路のブロツク図、第４図は第３図
の補償特性の説明図である。
６…高域通過フイルタ、７，２８…振幅リミツ
タ、８…加算回路、２３…ノイズ検出回路、２４
，３６…検波回路、２６…可変減衰器。
1 and 2 show an embodiment of the image quality compensation circuit of this invention, FIG. 1 is a block diagram of one embodiment, FIG. 2 is a block diagram of another embodiment, and FIG. 3 is a conventional image quality compensation circuit. FIG. 4, a block diagram of the compensation circuit, is an explanatory diagram of the compensation characteristics of FIG. 3. 6... High-pass filter, 7, 28... Amplitude limiter, 8... Addition circuit, 23... Noise detection circuit, 24
, 36...detection circuit, 26...variable attenuator.
Claims (1)
を強調し前記記録映像信号の細部情報を強調する
画質補償回路において、 前記輝度信号から高域成分を抽出する高域通過
フイルタと、 前記高域成分の信号が入力され、入力信号を振
幅制限処理して出力する振幅リミツタと、 前記輝度信号に前記リミツタの出力信号を加算
し、前記小振幅成分が強調された輝度信号を出力
する加算回路と、 前記フイルタに入力される輝度信号のノイズ成
分を検出し前記ノイズ成分に比例したレベルのノ
イズ検出信号を出力するノイズ検出回路と、 前記検出信号を検波し前記ノイズ成分の積分レ
ベルあるいは包絡線レベルの検波信号を出力する
検波回路と、 前記検波信号により前記リミツタの入力レベル
または出力レベルあるいは振幅制限レベルを可変
する強調量可変手段と を備えた画質補償回路。[Claims for Utility Model Registration] In an image quality compensation circuit that emphasizes high-frequency small amplitude components of a luminance signal in a recorded video signal and emphasizes detailed information of the recorded video signal, the high-frequency component is extracted from the luminance signal. a high-pass filter; an amplitude limiter to which the high-frequency component signal is input; and an amplitude limiter that performs amplitude limiting processing on the input signal and outputs the signal; and an amplitude limiter that adds the output signal of the limiter to the luminance signal so that the small amplitude component is emphasized. a noise detection circuit that detects a noise component of the luminance signal input to the filter and outputs a noise detection signal having a level proportional to the noise component; An image quality compensation circuit comprising: a detection circuit that outputs a detection signal at an integral level or an envelope level of a noise component; and enhancement amount variable means for varying the input level, output level, or amplitude limiting level of the limiter based on the detection signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16028586U JPS6365364U (en) | 1986-10-20 | 1986-10-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16028586U JPS6365364U (en) | 1986-10-20 | 1986-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6365364U true JPS6365364U (en) | 1988-04-30 |
Family
ID=31085524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16028586U Pending JPS6365364U (en) | 1986-10-20 | 1986-10-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6365364U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
-
1986
- 1986-10-20 JP JP16028586U patent/JPS6365364U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
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