JPS57160284A - Luminance signal separating circuit - Google Patents

Luminance signal separating circuit

Info

Publication number
JPS57160284A
JPS57160284A JP4674881A JP4674881A JPS57160284A JP S57160284 A JPS57160284 A JP S57160284A JP 4674881 A JP4674881 A JP 4674881A JP 4674881 A JP4674881 A JP 4674881A JP S57160284 A JPS57160284 A JP S57160284A
Authority
JP
Japan
Prior art keywords
luminance signal
output
frequency characteristics
delay line
filter
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
JP4674881A
Other languages
Japanese (ja)
Other versions
JPH0139274B2 (en
Inventor
Jun Hirai
Masayasu Kaneko
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP4674881A priority Critical patent/JPS57160284A/en
Publication of JPS57160284A publication Critical patent/JPS57160284A/en
Publication of JPH0139274B2 publication Critical patent/JPH0139274B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

Abstract

PURPOSE:To compensate the frequency characteristics of a comb line filter and to separate a luminance signal with generally flat characteristics, by feeding back an output of an attenuator to the attenuator through a filter circuit. CONSTITUTION:A color video signal (a) from an input terminal 1 is inputted to a 1H delay line 4 and an adder 5. A signal (b) delayed by 1H in the delay line 4 is added to the adder 5 and a luminance signal (c) separated by a comb line filter 3 is supplied to a synthesizing device 7. An output of said device 7 is sent to an output terminal 2 to output as a luminance signal (d'). The luminance signal (d') is inputted to a filter circuit 8 with the same frequency characteristics as the pass frequency characteristics of the delay line 4 and the output of the filter circuit 8 is fed back to the synthesizing device 7. Thus, the frequency characteristics of the comb line filter 3 in the delay line 4 is compensated, outputting the luminance signal with generally flat characteristics.
JP4674881A 1981-03-30 1981-03-30 Luminance signal separating circuit Granted JPS57160284A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4674881A JPS57160284A (en) 1981-03-30 1981-03-30 Luminance signal separating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4674881A JPS57160284A (en) 1981-03-30 1981-03-30 Luminance signal separating circuit

Publications (2)

Publication Number Publication Date
JPS57160284A true JPS57160284A (en) 1982-10-02
JPH0139274B2 JPH0139274B2 (en) 1989-08-18

Family

ID=12755945

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4674881A Granted JPS57160284A (en) 1981-03-30 1981-03-30 Luminance signal separating circuit

Country Status (1)

Country Link
JP (1) JPS57160284A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124280A2 (en) * 1983-04-04 1984-11-07 Ampex Corporation Method and apparatus for the extraction of luminance information from a video signal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4873017A (en) * 1971-09-06 1973-10-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4873017A (en) * 1971-09-06 1973-10-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0124280A2 (en) * 1983-04-04 1984-11-07 Ampex Corporation Method and apparatus for the extraction of luminance information from a video signal

Also Published As

Publication number Publication date
JPH0139274B2 (en) 1989-08-18

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