JPS56157193A - Video signal processing circuit - Google Patents

Video signal processing circuit

Info

Publication number
JPS56157193A
JPS56157193A JP6131480A JP6131480A JPS56157193A JP S56157193 A JPS56157193 A JP S56157193A JP 6131480 A JP6131480 A JP 6131480A JP 6131480 A JP6131480 A JP 6131480A JP S56157193 A JPS56157193 A JP S56157193A
Authority
JP
Japan
Prior art keywords
circuit
output
signal
luminance signal
video signal
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.)
Pending
Application number
JP6131480A
Other languages
Japanese (ja)
Inventor
Yuzo Yamamoto
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo Electric Co Ltd
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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP6131480A priority Critical patent/JPS56157193A/en
Publication of JPS56157193A publication Critical patent/JPS56157193A/en
Pending 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
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/85—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded brightness signal occupying a frequency band totally overlapping the frequency band of the recorded chrominance signal, e.g. frequency interleaving

Abstract

PURPOSE:To ensure a minimum process for a luminance signal and reduce the deterioration of the luminance signal, only by subtracting the color component of 1.53MHz from the inputted baried subcarrier wave video signal. CONSTITUTION:A mixing circuit 23 inputs the output of a color processing circuit 7 and a signal generated from a signal generator 4 and then executes a converting function to cause the NTSC color subcarrier wave component formed at the circuit 7 to return to the base band again. Thus an output signal is delivered. The output of this mixing (converting) circuit 23 is applied to a subtractor circut 25 via a low or band pass filter 24 which makes the component of 1.53+ or -0.5MHz pass through. The circuit 25 inputs the output of a switch circuit 2 and the output of a filter 24 and delivers a luminance signal with its color component eliminated. This luminance signal is added with the output of the circuit 7 in the adder circuit 20, and the NTSC video signal is supplied to an output terminal 21.
JP6131480A 1980-05-08 1980-05-08 Video signal processing circuit Pending JPS56157193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6131480A JPS56157193A (en) 1980-05-08 1980-05-08 Video signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6131480A JPS56157193A (en) 1980-05-08 1980-05-08 Video signal processing circuit

Publications (1)

Publication Number Publication Date
JPS56157193A true JPS56157193A (en) 1981-12-04

Family

ID=13167567

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6131480A Pending JPS56157193A (en) 1980-05-08 1980-05-08 Video signal processing circuit

Country Status (1)

Country Link
JP (1) JPS56157193A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5036026A (en) * 1973-08-02 1975-04-04
JPS51130120A (en) * 1975-04-21 1976-11-12 Rca Corp Color video signal processor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5036026A (en) * 1973-08-02 1975-04-04
JPS51130120A (en) * 1975-04-21 1976-11-12 Rca Corp Color video signal processor

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