JPS6464481A - Emphasis/deemphasis circuit - Google Patents

Emphasis/deemphasis circuit

Info

Publication number
JPS6464481A
JPS6464481A JP22046587A JP22046587A JPS6464481A JP S6464481 A JPS6464481 A JP S6464481A JP 22046587 A JP22046587 A JP 22046587A JP 22046587 A JP22046587 A JP 22046587A JP S6464481 A JPS6464481 A JP S6464481A
Authority
JP
Japan
Prior art keywords
movement
high frequency
adjusting device
filter
time direction
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
JP22046587A
Other languages
Japanese (ja)
Other versions
JPH0514477B2 (en
Inventor
Yutaka Tanaka
Daiji Nishizawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Japan Broadcasting Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp filed Critical Nippon Hoso Kyokai NHK
Priority to JP22046587A priority Critical patent/JPS6464481A/en
Publication of JPS6464481A publication Critical patent/JPS6464481A/en
Publication of JPH0514477B2 publication Critical patent/JPH0514477B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To delete the deterioration of the picture quality of a movement area and to improve S/N by disposing movement adaptive level adjusting devices in modulating and demodulating sides. CONSTITUTION:In an emphasis circuit, the low frequency component of a video signal is supplied to an adder 5 by a horizontal LPF 1 and a high frequency component separated by a horizontal HPF 2 is emphasized in a time direction by a time direction high frequency emphasis filter 3. In a movement detecting part 8, a movement level is detected from the output of the filter 3 to control the movement adaptive level adjusting device 6. According to the output of the detector 8, the gain of an input signal is adjusted in the movement adaptice level adjusting device 7 in a deemphasis circuit to have 1/l to the gain l of the adjusting device 6 in the adjusting device 7. The horizontal high frequency component is deemphasized by the time direction high frequency suppressing filter 4 of a reverse characteristic to the filter 3.
JP22046587A 1987-09-04 1987-09-04 Emphasis/deemphasis circuit Granted JPS6464481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22046587A JPS6464481A (en) 1987-09-04 1987-09-04 Emphasis/deemphasis circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22046587A JPS6464481A (en) 1987-09-04 1987-09-04 Emphasis/deemphasis circuit

Publications (2)

Publication Number Publication Date
JPS6464481A true JPS6464481A (en) 1989-03-10
JPH0514477B2 JPH0514477B2 (en) 1993-02-25

Family

ID=16751543

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22046587A Granted JPS6464481A (en) 1987-09-04 1987-09-04 Emphasis/deemphasis circuit

Country Status (1)

Country Link
JP (1) JPS6464481A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350948A2 (en) * 1988-07-14 1990-01-17 Toyohakka Kogyo Kabushiki Kaisha Porphyrin derivatives
JPH05501034A (en) * 1989-10-03 1993-02-25 ゼネラル　エレクトリツク　カンパニイ Adaptive video signal noise reduction system
US10458042B2 (en) 2013-12-25 2019-10-29 Nikon Corporation Calcium fluoride member, method for producing same, and method for pressure-bonding calcium fluoride crystal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350948A2 (en) * 1988-07-14 1990-01-17 Toyohakka Kogyo Kabushiki Kaisha Porphyrin derivatives
JPH05501034A (en) * 1989-10-03 1993-02-25 ゼネラル　エレクトリツク　カンパニイ Adaptive video signal noise reduction system
US10458042B2 (en) 2013-12-25 2019-10-29 Nikon Corporation Calcium fluoride member, method for producing same, and method for pressure-bonding calcium fluoride crystal

Also Published As

Publication number Publication date
JPH0514477B2 (en) 1993-02-25

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