JPS6126368U

JPS6126368U - Ghost removal device

Info

Publication number: JPS6126368U
Application number: JP10887784U
Authority: JP
Inventors: 郁也荒井; 敏則村田; 正文員見
Original assignee: 株式会社日立製作所
Priority date: 1984-07-20
Filing date: 1984-07-20
Publication date: 1986-02-17

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 drawings]

第１図は従来のゴースト除去装置の一例ｉ示すブロック
図、第２図は第１図におけるトランスバ−”−／Ｌ／７
イルタ３の詳細を示すブロック図、第３図は第１図にお
ける要部の信号波形を示す波形図、第４図は第１図のコ
ースト除去装置によるゴースト除去動作を示す波形図、
第５図は本考案の一実施例を示すブロック図、第６図は
第５図におけるフィルタ回路１９の詳細を示すブロック
図、第７図は第５図における要部の信号波形を示す波形
図である。１・一七デオ信号入力端子、２・・・ビデオ信号出力端
子、３・・・トランスバーサルフィルタ、４・・・減算
器、５・・・基準信号発生回路、６・・・微分回路、７
・・・コンパレータ、訃・・メモリ、９・・・ｉ算器、
１０・・・タップ利得メモリ、１１・・・Ｄ／Ａ変換器
、１５・・・遅延素子、１、６・・・タップ増幅器、１
８・・・波形整形回路、１９・・・フィルタ回路。FIG. 1 is a block diagram showing an example of a conventional ghost removal device, and FIG. 2 is a block diagram showing an example of a conventional ghost removal device.
3 is a waveform diagram showing the signal waveforms of the main parts in FIG. 1; FIG. 4 is a waveform diagram showing the ghost removal operation by the coast removal device shown in FIG. 1;
FIG. 5 is a block diagram showing an embodiment of the present invention, FIG. 6 is a block diagram showing details of the filter circuit 19 in FIG. 5, and FIG. 7 is a waveform diagram showing signal waveforms of important parts in FIG. 5. It is. 1.17 video signal input terminal, 2... video signal output terminal, 3... transversal filter, 4... subtracter, 5... reference signal generation circuit, 6... differentiator circuit, 7
... comparator, ... memory, 9 ... i calculator,
10... Tap gain memory, 11... D/A converter, 15... Delay element, 1, 6... Tap amplifier, 1
8... Waveform shaping circuit, 19... Filter circuit.

Claims

[Scope of utility model registration request]

a transversal filter, comprising a tap amplifier and a charge transfer element, into which a video signal is input; a tap that stores the tap gain of each tap amplifier included in the transversal filter; and supplies tap gain data stored in the transversal filter; The gain memory compares a timing signal synchronized with a predetermined reference signal included in the video signal and a signal containing a ghost component included in the video signal that has passed through the transversal filter, thereby obtaining the reference signal. means for detecting information on the existence position of a ghost component with the time reference position as a temporal reference position; means for modifying tap gain data stored in the tap gain memory according to the detected existence position information; and means for removing a coast component from a video signal that has passed through the transversal filter by controlling the gain of each tap amplifier in the transversal filter. A detection means for detecting a position, a switch means connected to the detection means and opened and closed by an output signal of the detection means, a transversal filter and a switch means connected to the switch means, and included in the video signal that has passed through the transversal filter. 1. A ghost removal device comprising filter means for attenuating and suppressing a signal of a Takagi component at a position where a coast exists.