JPS6068754U

JPS6068754U - contour compensation circuit

Info

Publication number: JPS6068754U
Application number: JP16155283U
Authority: JP
Inventors: 長井　清武
Original assignee: 日本電気株式会社
Priority date: 1983-10-19
Filing date: 1983-10-19
Publication date: 1985-05-15

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は一般的な輪郭補償回路のブロック図、第２図は
この輪郭補償回路に用いられる従来の利得制御回路の回
路図、第３図は本考案の一実施例に用いられる利得制御
回路の回路図、第４図ａはウェーティング信号の波形と
対応するテレビ画面との位置関係を現す図、同図すはウ
ェーティング信号の模式的波形図である。１・・・水平輪郭信号発生回路、２・・・垂直輪郭信号
発生回路、３・・・水平垂直輪郭信号加算制御器、４・
・・ブランキング挿入増幅器、５・・・ノイズキラー回
路、６・・・利得制御回路、７・・・ブランキング挿入
制御器、８・・・ノイズキラー制御器、９・・・利得制
御器、６０・・・テレビ画面。Figure 1 is a block diagram of a general contour compensation circuit, Figure 2 is a circuit diagram of a conventional gain control circuit used in this contour compensation circuit, and Figure 3 is a gain control circuit used in an embodiment of the present invention. FIG. 4A is a diagram showing the positional relationship between the waveform of the waiting signal and the corresponding television screen, and FIG. 4A is a schematic waveform diagram of the waiting signal. DESCRIPTION OF SYMBOLS 1...Horizontal contour signal generation circuit, 2...Vertical contour signal generation circuit, 3...Horizontal/vertical contour signal addition controller, 4.
...Blanking insertion amplifier, 5...Noise killer circuit, 6...Gain control circuit, 7...Blanking insertion controller, 8...Noise killer controller, 9...Gain controller, 60...TV screen.

Claims

[Scope of utility model registration request]

A circuit is provided for controlling the amplification gain of the contour compensation signal according to the amplitudes of horizontal and vertical weighting signals, and the weighting signal changes the amplification gain at a time corresponding to the peripheral part of the image to the time corresponding to the center part of the image. A contour compensation circuit characterized in that the waveform has a waveform that is higher than the amplification gain at the time.