JPS58189662U - Video brightness signal correction circuit - Google Patents
Video brightness signal correction circuitInfo
- Publication number
- JPS58189662U JPS58189662U JP8675182U JP8675182U JPS58189662U JP S58189662 U JPS58189662 U JP S58189662U JP 8675182 U JP8675182 U JP 8675182U JP 8675182 U JP8675182 U JP 8675182U JP S58189662 U JPS58189662 U JP S58189662U
- Authority
- JP
- Japan
- Prior art keywords
- level
- detection means
- video
- signal
- level detection
- 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
- Picture Signal Circuits (AREA)
- Television Receiver Circuits (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
グ 第１因は従来の映像輝度信号雑音低減回路のブ
１ ロック図。第２図は本考案の一実施例のブロック
１ 図。第３図は本考案の一実施例の作用の説明に供
： する波形図。
１・・・ローパスフィルタ、２・・・バイパスフィルタ
、； ４および５・・・レベル比較器、７・・・傾斜
検出パルス： 発生回路、９および１０・・・単安定
マルチパイブレ］ −夕、１１・・・平坦部検出パル
ス発生回路、１２お１ よび１３・・・アナログスイ
ッチ、１６および１７・・・： レベル検出器、１８
・・・リミッタ、１９・・・可変利得増幅器。The first cause is the block diagram of a conventional video luminance signal noise reduction circuit. FIG. 2 is a block 1 diagram of an embodiment of the present invention. FIG. 3 is a waveform diagram for explaining the operation of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1...Low pass filter, 2...Bypass filter, 4 and 5...Level comparator, 7...Slope detection pulse: Generation circuit, 9 and 10...Monostable multi-pibre] - evening, 11 ... Flat part detection pulse generation circuit, 12 and 1 and 13 ... Analog switch, 16 and 17 ...: Level detector, 18
...Limiter, 19...Variable gain amplifier.
Claims (1)
レベルを検出する第１のレベル検出手段と、該第１のレ
ベル検出手段により検出された刺音成分レベルに比例し
たレベル以上の前記映像１度信号高域成分のみを通過さ
せるレベル制限手段とを備えた雑音低減回路と、 前記水平同期信号の立上り部分と立下り部分の少なくと
も一方の時間変化を検出する第２のレベル検出手段と、
該第２のレベル検出手段により検出された電圧変化に比
例して前記映像輝度信号高域成分のみを増強する増幅回
路とを備えた周波数特性補正回路と の何れか一方を少なくとも備えてなることを特徴とする
映像輝度信号補正回路。[Claims for Utility Model Registration] A first level detection means for detecting a noise component level in the leading edge portion of a synchronization signal in a video luminance signal, and a noise component level proportional to the level of a stinging sound component detected by the first level detection means. a noise reduction circuit comprising: level limiting means for passing only high-frequency components of the video 1-degree signal having a level equal to or higher; and a second noise reduction circuit for detecting a temporal change in at least one of a rising portion and a falling portion of the horizontal synchronizing signal. level detection means,
and an amplifier circuit that enhances only the high frequency component of the video luminance signal in proportion to the voltage change detected by the second level detection means. Features a video brightness signal correction circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8675182U JPS58189662U (en) | 1982-06-12 | 1982-06-12 | Video brightness signal correction circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8675182U JPS58189662U (en) | 1982-06-12 | 1982-06-12 | Video brightness signal correction circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58189662U true JPS58189662U (en) | 1983-12-16 |
Family
ID=30095522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8675182U Pending JPS58189662U (en) | 1982-06-12 | 1982-06-12 | Video brightness signal correction circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58189662U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517008A (en) * | 1974-07-09 | 1976-01-21 | Asahi Glass Co Ltd | Garasuyojurono kairyo |
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
-
1982
- 1982-06-12 JP JP8675182U patent/JPS58189662U/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS517008A (en) * | 1974-07-09 | 1976-01-21 | Asahi Glass Co Ltd | Garasuyojurono kairyo |
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
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