JPS56144677A - Multiple-screen television receiver - Google Patents

Multiple-screen television receiver

Info

Publication number
JPS56144677A
JPS56144677A JP4690480A JP4690480A JPS56144677A JP S56144677 A JPS56144677 A JP S56144677A JP 4690480 A JP4690480 A JP 4690480A JP 4690480 A JP4690480 A JP 4690480A JP S56144677 A JPS56144677 A JP S56144677A
Authority
JP
Japan
Prior art keywords
signal
screen
sampling
memory
subordinate
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
JP4690480A
Other languages
Japanese (ja)
Inventor
Yuji Ito
Tomomitsu Azeyanagi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4690480A priority Critical patent/JPS56144677A/en
Publication of JPS56144677A publication Critical patent/JPS56144677A/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 prevent picture quality from deterioration even when the number of sampling points and required memory capacity are reduced, by making sampling points different between two scanning lines. CONSTITUTION:Flip-flops 46A and 46B are inverted in logic level on every sampling scanning line to output the control signal of changeover switch level is ''1'' or a phase-inverted writing clock signal when ''0'', thereby controlling changeover switches 45A and 45B. Changeover switches 45A and 45B switch two kinds of 180 deg. out-of-phase signal on every sampling scanning line and input them to memory 41. The picture signal of a subordinate screen is stored in memory 41 and then inserted into a master screen signal by subordinate-screen inserting circuit 12.
JP4690480A 1980-04-11 1980-04-11 Multiple-screen television receiver Pending JPS56144677A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4690480A JPS56144677A (en) 1980-04-11 1980-04-11 Multiple-screen television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4690480A JPS56144677A (en) 1980-04-11 1980-04-11 Multiple-screen television receiver

Publications (1)

Publication Number Publication Date
JPS56144677A true JPS56144677A (en) 1981-11-11

Family

ID=12760337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4690480A Pending JPS56144677A (en) 1980-04-11 1980-04-11 Multiple-screen television receiver

Country Status (1)

Country Link
JP (1) JPS56144677A (en)

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