JPS56122575A - Picture indicator of cathode-ray tube - Google Patents

Picture indicator of cathode-ray tube

Info

Publication number
JPS56122575A
JPS56122575A JP2646780A JP2646780A JPS56122575A JP S56122575 A JPS56122575 A JP S56122575A JP 2646780 A JP2646780 A JP 2646780A JP 2646780 A JP2646780 A JP 2646780A JP S56122575 A JPS56122575 A JP S56122575A
Authority
JP
Japan
Prior art keywords
circuit
picture
blanking pulse
crt4
crt
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
JP2646780A
Other languages
Japanese (ja)
Inventor
Shigeru Kashiwagi
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP2646780A priority Critical patent/JPS56122575A/en
Publication of JPS56122575A publication Critical patent/JPS56122575A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen

Landscapes

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

Abstract

PURPOSE:To superpose and display a specific display picture on the regular picture, by adding a blanking pulse waveform shaping circuit by which a blanking pulse in the deflection flyback period of a CRT is not applied to the CRT for a prescribed time within the flyback time. CONSTITUTION:A video signal and a synchronizing signal are provided to the video amplification output circuit 2 and the synchronizing defection circuit 3, respectively, from the circuit 1 containing the antenna input, channel selection mechanism, video intermediate frequency amplification, detection, synchronizing separation, etc. The outputs of the circuits 2, 3 are provided to the CRT4, respectively, and modulate and deflect an electronic beam of the CRT. A blanking pulse which has been generated by the horizontal deflection blanking pulse generating circuit 5 is provided to the circuit 2, and cuts off the electronic beam of the horizontal scanning flyback time CRT4. The pulse from the circuit 5 is input to the waveform shaping circuit 6, the blanking pulse to be provided to the circuit 2 depending on the state of a display signal S is shaped, and in the course of scanning of the horizontal deflection fly-back line on the picture of the CRT4, in addition to the regular picture (a), the display picture (b) of a longitudinal bright line for displaying that a sound multiplex telecasting is being executed, etc. is superposed and displayed.
JP2646780A 1980-03-03 1980-03-03 Picture indicator of cathode-ray tube Pending JPS56122575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2646780A JPS56122575A (en) 1980-03-03 1980-03-03 Picture indicator of cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2646780A JPS56122575A (en) 1980-03-03 1980-03-03 Picture indicator of cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS56122575A true JPS56122575A (en) 1981-09-26

Family

ID=12194313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2646780A Pending JPS56122575A (en) 1980-03-03 1980-03-03 Picture indicator of cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS56122575A (en)

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