JPS58189662U - Video brightness signal correction circuit - Google Patents

Video brightness signal correction circuit

Info

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
Application number
JP8675182U
Other languages
Japanese (ja)
Inventor
徹夫 高橋
Original Assignee
株式会社ケンウッド
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 株式会社ケンウッド filed Critical 株式会社ケンウッド
Priority to JP8675182U priority Critical patent/JPS58189662U/en
Publication of JPS58189662U publication Critical patent/JPS58189662U/en
Pending legal-status Critical Current

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  • 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

【図面の簡単な説明】[Brief explanation of drawings]

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)

【実用新案登録請求の範囲】 映像輝度信号中の同期信号先端部分中における雑音成分
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.
JP8675182U 1982-06-12 1982-06-12 Video brightness signal correction circuit Pending JPS58189662U (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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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