JPH036369U - - Google Patents
Info
- Publication number
- JPH036369U JPH036369U JP6575789U JP6575789U JPH036369U JP H036369 U JPH036369 U JP H036369U JP 6575789 U JP6575789 U JP 6575789U JP 6575789 U JP6575789 U JP 6575789U JP H036369 U JPH036369 U JP H036369U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- pulse
- detection
- video signal
- 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)
Description
第１図は本考案に係る画質改善回路の一実施例
を示す回路図、第２図は第１図の画質改善回路の
具体的な回路例を示す回路図、第３図は第１図の
各部動作波形図、第４図は本考案に係る画質改善
回路の他の実施例を示す回路図、第５図は本考案
に係る画質改善回路の更に他の実施例を示す回路
図、第６図は従来の画質改善回路を示す回路図、
第７図は第６図の各部動作波形図、第８図は他の
従来の画質改善回路を示す回路図である。
２１……入力端子、２２……２Ｈ遅延回路、２
３……差動増幅回路、２４……第１の検出回路、
２５……第２の検出回路、２６……論理回路、２
７……補正回路、２８……出力端子。
FIG. 1 is a circuit diagram showing an embodiment of the image quality improvement circuit according to the present invention, FIG. 2 is a circuit diagram showing a specific example of the image quality improvement circuit shown in FIG. 1, and FIG. 4 is a circuit diagram showing another embodiment of the image quality improvement circuit according to the present invention. FIG. 5 is a circuit diagram showing still another embodiment of the image quality improvement circuit according to the present invention. The figure shows a circuit diagram of a conventional image quality improvement circuit.
FIG. 7 is an operational waveform diagram of each part of FIG. 6, and FIG. 8 is a circuit diagram showing another conventional image quality improvement circuit. 21...Input terminal, 22...2H delay circuit, 2
3... Differential amplifier circuit, 24... First detection circuit,
25...Second detection circuit, 26...Logic circuit, 2
7... Correction circuit, 28... Output terminal.
Claims (1)
側に混入したパルス性ノイズを除去する画質改善
回路であつて、 映像信号入力端子からの前記映像信号を水平走
査期間の整数倍遅延する遅延回路と、 この遅延回路からの遅延信号と前記映像信号入
力端子からの信号との差分を求める差動増幅回路
と、 前記パルス性ノイズによつて前記差動増幅回路
からの差分信号に現れる黒レベル側及び白レベル
側パルス成分を示す第１検出信号を出力する第１
の検出回路と、 前記パルス性ノイズを検出対象としたレベルが
設定され、このレベルより黒レベル及び白レベル
側に振れるパルス成分を示す第２、第３の検出信
号を前記入力端子からの映像信号又は前記遅延信
号より検出出力する第２の検出回路と、 これら第１乃至第３の各検出信号に基づいて前
記映像信号入力端子からの信号又は遅延回路から
の遅延信号に混入したパルス性ノイズの位置を示
すノイズ除去用パルスを形成する論理回路と、 このノイズ除去用パルスに基づいて前記映像信
号からパルス性ノイズを除去する補正回路とを具
備したことを特徴とする画質改善回路。[Claims for Utility Model Registration] An image quality improvement circuit that removes pulse noise mixed into the white and black level sides from a baseband video signal, the circuit comprising: a delay circuit that delays by an integer multiple; a differential amplifier circuit that calculates the difference between the delayed signal from the delay circuit and the signal from the video signal input terminal; A first detection signal that outputs a first detection signal indicating black level side and white level side pulse components appearing in the signal.
a detection circuit, a level is set for detecting the pulsed noise, and second and third detection signals indicating pulse components swinging toward the black level and white level from this level are input to the video signal from the input terminal. or a second detection circuit that detects and outputs the delayed signal; and detects pulse noise mixed in the signal from the video signal input terminal or the delayed signal from the delay circuit based on each of the first to third detection signals. An image quality improvement circuit comprising: a logic circuit that forms a noise removal pulse indicating a position; and a correction circuit that removes pulse noise from the video signal based on the noise removal pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575789U JPH036369U (en) | 1989-06-07 | 1989-06-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6575789U JPH036369U (en) | 1989-06-07 | 1989-06-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH036369U true JPH036369U (en) | 1991-01-22 |
Family
ID=31597870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6575789U Pending JPH036369U (en) | 1989-06-07 | 1989-06-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH036369U (en) |
-
1989
- 1989-06-07 JP JP6575789U patent/JPH036369U/ja active Pending
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