JPS6257491U - - Google Patents

Info

Publication number
JPS6257491U
JPS6257491U JP14857985U JP14857985U JPS6257491U JP S6257491 U JPS6257491 U JP S6257491U JP 14857985 U JP14857985 U JP 14857985U JP 14857985 U JP14857985 U JP 14857985U JP S6257491 U JPS6257491 U JP S6257491U
Authority
JP
Japan
Prior art keywords
color difference
signal
circuit
difference signal
color
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.)
Granted
Application number
JP14857985U
Other languages
English (en)
Other versions
JPH0413896Y2 (ja
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 filed Critical
Priority to JP1985148579U priority Critical patent/JPH0413896Y2/ja
Publication of JPS6257491U publication Critical patent/JPS6257491U/ja
Application granted granted Critical
Publication of JPH0413896Y2 publication Critical patent/JPH0413896Y2/ja
Expired legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)

Description

【図面の簡単な説明】
第１図はこの考案に係るクロマキー信号発生装
置の一実施例を示すブロツク回路構成図、第２図
及び第３図はそれぞれ同実施例の動作を説明する
ための図、第４図は従来のクロマキー信号発生装
置の構成を示すブロツク回路図、第５図及び第６
図はそれぞれ従来の装置の動作を説明するための
図である。 ２１〜２３……入力端子、２４〜２６……色差
発生回路、２７……セレクタ回路、２８……選択
切換回路、２９，３０……混合器、、３１……混
合比調整回路、３２……加算器、３３……二乗回
路、３４……反転増幅器、３５……利得調整回路
、３６……ブラツククリツプ回路。

Claims (1)

    【実用新案登録請求の範囲】
  1. 第１乃至第３の原色信号を入力し第１の原色信
    号から第３の原色信号を減算した第１の色差信号
    及び第２の原色信号から第３の原色信号を減算し
    た第２の色差信号を取出す色差信号発生手段と、
    前記第２の色差信号を二乗演算する二乗回路と、
    この二乗回路の出力を反転増幅する反転増幅回路
    と、この反転増幅回路の出力と前記色差信号発生
    手段で取出される第１の色差信号とを加算する加
    算回路と、この加算回路の出力の少なくとも負極
    性側をクリツプしてクロマキー信号を発生するブ
    ラツククリツプ回路とを具備したことを特徴とす
    るクロマキー信号発生装置。
JP1985148579U 1985-09-28 1985-09-28 Expired JPH0413896Y2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1985148579U JPH0413896Y2 (ja) 1985-09-28 1985-09-28

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1985148579U JPH0413896Y2 (ja) 1985-09-28 1985-09-28

Publications (2)

Publication Number Publication Date
JPS6257491U true JPS6257491U (ja) 1987-04-09
JPH0413896Y2 JPH0413896Y2 (ja) 1992-03-30

Family

ID=31062984

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1985148579U Expired JPH0413896Y2 (ja) 1985-09-28 1985-09-28

Country Status (1)

Country Link
JP (1) JPH0413896Y2 (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511694A (en) * 1978-07-07 1980-01-26 Philips Nv Color television color selector
JPS5537097A (en) * 1978-08-30 1980-03-14 Rca Corp Black marking signal selector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511694A (en) * 1978-07-07 1980-01-26 Philips Nv Color television color selector
JPS5537097A (en) * 1978-08-30 1980-03-14 Rca Corp Black marking signal selector

Also Published As

Publication number Publication date
JPH0413896Y2 (ja) 1992-03-30

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