JPS58158569U - Luminance signal band automatic limit circuit - Google Patents
Luminance signal band automatic limit circuitInfo
- Publication number
- JPS58158569U JPS58158569U JP5444382U JP5444382U JPS58158569U JP S58158569 U JPS58158569 U JP S58158569U JP 5444382 U JP5444382 U JP 5444382U JP 5444382 U JP5444382 U JP 5444382U JP S58158569 U JPS58158569 U JP S58158569U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- luminance signal
- detection circuit
- 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)
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
第１図は本考案の一実施例を示すブロック図。
第２図ａおよびｂは本考案の一実施例における波形変換
回路およびノイズレベル検出回路の一例を示すブロック
図。第３図ａおよびｂは本考案のＬ実施例におけるロー
パスフィルタおよびバンドエリミネーションフィルタの
一例を示す回路図。第４図は本考案の一実施例の作用の
説明に供する波形図。
１・・・・・・複合信金線路、２・・・・・・水平同期
信号分離回路、３・・・・・・波形変換回路、４・・・
・・・ゲート回路、６・０・・・ノイズレベル検出回路
、７・・・・・田−パスフィルタ。FIG. 1 is a block diagram showing an embodiment of the present invention. FIGS. 2a and 2b are block diagrams showing an example of a waveform conversion circuit and a noise level detection circuit in an embodiment of the present invention. FIGS. 3a and 3b are circuit diagrams showing an example of a low-pass filter and a band elimination filter in the L embodiment of the present invention. FIG. 4 is a waveform diagram for explaining the operation of an embodiment of the present invention. 1...Composite Shinkin Bank line, 2...Horizontal synchronization signal separation circuit, 3...Waveform conversion circuit, 4...
. . . Gate circuit, 6.0… Noise level detection circuit, 7. . . .-Pass filter.
Claims (1)
路と、前記複合信号から分離した水平同期信号のパルス
幅を縮小して前記ゲート回路にゲート信号として出力す
る波形変換回路と、前記ゲート回路からの出力信号中の
交流ノイズ成分レベルを検出し該交流ノイズ成分レベル
に対応した出力信号を少なくとも前記水平同期信号の繰
返し周期の１周期の期間出力するノイズレベル検出回路
と、前記ノイズレベル検出回路の出力信号の存在により
選択的に前記複合信号の線路に挿入されかつ前記ノイズ
レベル検出回路の出力信号により時定数が制御されるロ
ーパスフィルタまたはバンドエリミネーションフィルタ
とを備え、前記ローパスフィルタまたはバンドエリミネ
ーションフィルタを介して輝度信号帯域を自動的に制限
することを特徴とする輝度信号帯域自動制限回路。 −a gate circuit to which a composite signal of a luminance signal and a synchronization signal is applied; a waveform conversion circuit that reduces the pulse width of a horizontal synchronization signal separated from the composite signal and outputs it as a gate signal to the gate circuit; and the gate circuit. a noise level detection circuit that detects an AC noise component level in an output signal from the AC noise component level and outputs an output signal corresponding to the AC noise component level for at least one cycle of the repetition cycle of the horizontal synchronization signal; and the noise level detection circuit. a low-pass filter or band elimination filter that is selectively inserted into the line of the composite signal due to the presence of the output signal of the noise level detection circuit and whose time constant is controlled by the output signal of the noise level detection circuit; A luminance signal band automatic limiting circuit characterized in that the luminance signal band is automatically limited through a nation filter. −
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5444382U JPS58158569U (en) | 1982-04-16 | 1982-04-16 | Luminance signal band automatic limit circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5444382U JPS58158569U (en) | 1982-04-16 | 1982-04-16 | Luminance signal band automatic limit circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58158569U true JPS58158569U (en) | 1983-10-22 |
Family
ID=30065065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5444382U Pending JPS58158569U (en) | 1982-04-16 | 1982-04-16 | Luminance signal band automatic limit circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58158569U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4914366A (en) * | 1972-06-01 | 1974-02-07 | ||
| JPS5248916A (en) * | 1975-10-16 | 1977-04-19 | Matsushita Electric Ind Co Ltd | Automated frequency property adjusting unit |
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
-
1982
- 1982-04-16 JP JP5444382U patent/JPS58158569U/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4914366A (en) * | 1972-06-01 | 1974-02-07 | ||
| JPS5248916A (en) * | 1975-10-16 | 1977-04-19 | Matsushita Electric Ind Co Ltd | Automated frequency property adjusting unit |
| JPS5259520A (en) * | 1975-11-11 | 1977-05-17 | Matsushita Electric Ind Co Ltd | Noise suppression circuit |
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