JPS56789A - Video signal processing circuit - Google Patents

Video signal processing circuit

Info

Publication number
JPS56789A
JPS56789A JP7613879A JP7613879A JPS56789A JP S56789 A JPS56789 A JP S56789A JP 7613879 A JP7613879 A JP 7613879A JP 7613879 A JP7613879 A JP 7613879A JP S56789 A JPS56789 A JP S56789A
Authority
JP
Japan
Prior art keywords
signal
chroma signal
output
circuit
scanning lines
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
JP7613879A
Other languages
Japanese (ja)
Inventor
Akira Usui
Tetsuo Kuchiki
Toshimitsu Fujimori
Masaaki Fujita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7613879A priority Critical patent/JPS56789A/en
Publication of JPS56789A publication Critical patent/JPS56789A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00—Colour television systems
    • H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/12—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only
    • H04N11/14—Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous signals only in which one signal, modulated in phase and amplitude, conveys colour information and a second signal conveys brightness information, e.g. NTSC-system

Abstract

PURPOSE:To increase the video quality by perfectly rejecting chroma signal through the rejection of the chroma signal not in common with two horizontal scanning lines with the trap circuit. CONSTITUTION:The composite video signal from the input terminal 5 is divided into two, and one is through the BPF6 passing through the band of chroma signal only. The output is divided into two. One is delayed by 1H period at the delay circuit 7 and it is added with another signal not delayed at the addition circuit 8 to detect the chroma signal not in common in two scanning lines. The detection signal is obtained only for the period corresponding to the part d for difference between two scanning lines. On the other hand, the input from the terminal 5 is added with the output of the delay circuit 7 at the addition circuit 10 and the luminance signal is picked up. But, in this output, the part d chroma signal is left. Then, the remaining chroma signal is rejected for the output of the addition circuit 10 at the trap circuit 11. Thus, since the chroma signal is perfectly rejected, the video quality can be increased.
JP7613879A 1979-06-15 1979-06-15 Video signal processing circuit Pending JPS56789A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7613879A JPS56789A (en) 1979-06-15 1979-06-15 Video signal processing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7613879A JPS56789A (en) 1979-06-15 1979-06-15 Video signal processing circuit

Publications (1)

Publication Number Publication Date
JPS56789A true JPS56789A (en) 1981-01-07

Family

ID=13596605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7613879A Pending JPS56789A (en) 1979-06-15 1979-06-15 Video signal processing circuit

Country Status (1)

Country Link
JP (1) JPS56789A (en)

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

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