JPS56107675A - Video signal mixing circuit - Google Patents

Video signal mixing circuit

Info

Publication number
JPS56107675A
JPS56107675A JP1066580A JP1066580A JPS56107675A JP S56107675 A JPS56107675 A JP S56107675A JP 1066580 A JP1066580 A JP 1066580A JP 1066580 A JP1066580 A JP 1066580A JP S56107675 A JPS56107675 A JP S56107675A
Authority
JP
Japan
Prior art keywords
signal
circuit
synchronizing
video
camera
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
JP1066580A
Other languages
Japanese (ja)
Inventor
Yoshiichi Nishimura
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 JP1066580A priority Critical patent/JPS56107675A/en
Publication of JPS56107675A publication Critical patent/JPS56107675A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/63—Control of cameras or camera modules by using electronic viewfinders

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To prevent a synchronizing disturbance of the picture by mixing a signal which has removed a synchronizing signal from the video signal provided from the outside, with the video signal obtained from a TV camera, and providing it to the view finder circuit of TV camera. CONSTITUTION:A video signal S1 obtained from a TV camera is provided to the input terminal 1, and a video signal S2 inserted from another TV camera is provided to the input terminal 2. The signal S1 is added to not only the synchronization separating circuit 3 but also the mixing circuit 4. On the other hand, as for the signal S2, the synchronizing signal is removed from the synchronizing signal removing circuit 6, only the video part is added by the adder circuit 5 together with the output S3, and a signal S5 in which a video part of the signal S2 has been superposed on a synchronizing signal S3 of the signal S1 is obtained. This signal S5 and the signal S1 are compounded in the prescribed ratio by the mixing circuit 4. When this composite signal S6 is added to the view finder circuit, a composite picture having no synchronizing disturbance, in which a picture of subsignal has been overlapped on a part of the main picture is obtained.
JP1066580A 1980-01-31 1980-01-31 Video signal mixing circuit Pending JPS56107675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1066580A JPS56107675A (en) 1980-01-31 1980-01-31 Video signal mixing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1066580A JPS56107675A (en) 1980-01-31 1980-01-31 Video signal mixing circuit

Publications (1)

Publication Number Publication Date
JPS56107675A true JPS56107675A (en) 1981-08-26

Family

ID=11756530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1066580A Pending JPS56107675A (en) 1980-01-31 1980-01-31 Video signal mixing circuit

Country Status (1)

Country Link
JP (1) JPS56107675A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543424A (en) * 1977-06-09 1979-01-11 Shin Meiwa Ind Co Ltd Tv video signal synthesizing circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543424A (en) * 1977-06-09 1979-01-11 Shin Meiwa Ind Co Ltd Tv video signal synthesizing circuit

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