JPS57118478A - Video signal switch - Google Patents

Video signal switch

Info

Publication number
JPS57118478A
JPS57118478A JP430781A JP430781A JPS57118478A JP S57118478 A JPS57118478 A JP S57118478A JP 430781 A JP430781 A JP 430781A JP 430781 A JP430781 A JP 430781A JP S57118478 A JPS57118478 A JP S57118478A
Authority
JP
Japan
Prior art keywords
switch
circuit
code
switches
held
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.)
Granted
Application number
JP430781A
Other languages
Japanese (ja)
Other versions
JPH0153549B2 (en
Inventor
Shinichi Eguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP430781A priority Critical patent/JPS57118478A/en
Publication of JPS57118478A publication Critical patent/JPS57118478A/en
Publication of JPH0153549B2 publication Critical patent/JPH0153549B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects

Landscapes

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

Abstract

PURPOSE:To simplify the constitution of a video signal switch, by using a comparator which receives a code showing the selection of a switch of the 1st switch circuit among the outputs of a holding circuit, compares the code with another code corresponding to a prescribed switch and gives the switch control to the 2nd switch circuit in accordance with the result of comparison. CONSTITUTION:The switch information (i) of a binary code is held at a holding circuit 1 with the timing of the trigger signal. A code i1 having the switch information of a switch circuit 2 containing plural cross points among the held signals is supplied to a decoder circuit 3 and converted into switch signals S corresponding to plural cross points in the circuit 2 to be sent to the circuit 2. On the other hand, a code i2 showing the selection of switches 7, 8 and 9 among the held outputs is supplied to a comparator 4 to be compared with the prescribed codes corresponding to the switches 7, 8 and 9 and produced at a code generating circuit 5. Then the cross point of a switch circuit 6 is closed by the output of a coincidence signal. Thus the function of the circuit 3 can be set equal among all switches.
JP430781A 1981-01-14 1981-01-14 Video signal switch Granted JPS57118478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP430781A JPS57118478A (en) 1981-01-14 1981-01-14 Video signal switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP430781A JPS57118478A (en) 1981-01-14 1981-01-14 Video signal switch

Publications (2)

Publication Number Publication Date
JPS57118478A true JPS57118478A (en) 1982-07-23
JPH0153549B2 JPH0153549B2 (en) 1989-11-14

Family

ID=11580834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP430781A Granted JPS57118478A (en) 1981-01-14 1981-01-14 Video signal switch

Country Status (1)

Country Link
JP (1) JPS57118478A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243981A (en) * 1985-08-21 1987-02-25 Nec Corp Distributing switcher
JPH0632319U (en) * 1992-10-08 1994-04-26 正剛 平川 Portable container holder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6243981A (en) * 1985-08-21 1987-02-25 Nec Corp Distributing switcher
JPH078027B2 (en) * 1985-08-21 1995-01-30 日本電気株式会社 Distribution switch
JPH0632319U (en) * 1992-10-08 1994-04-26 正剛 平川 Portable container holder

Also Published As

Publication number Publication date
JPH0153549B2 (en) 1989-11-14

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