JPS5520045A - Compounding method of video signal - Google Patents

Compounding method of video signal

Info

Publication number
JPS5520045A
JPS5520045A JP9280178A JP9280178A JPS5520045A JP S5520045 A JPS5520045 A JP S5520045A JP 9280178 A JP9280178 A JP 9280178A JP 9280178 A JP9280178 A JP 9280178A JP S5520045 A JPS5520045 A JP S5520045A
Authority
JP
Japan
Prior art keywords
signal
circuit
picture element
output
divider
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
JP9280178A
Other languages
Japanese (ja)
Other versions
JPS585626B2 (en
Inventor
Katsuaki Tomota
Masaru Takeshita
Yuji Inoue
Kazuyoshi Ishii
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 Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
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 Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP9280178A priority Critical patent/JPS585626B2/en
Publication of JPS5520045A publication Critical patent/JPS5520045A/en
Publication of JPS585626B2 publication Critical patent/JPS585626B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Synchronizing For Television (AREA)

Abstract

PURPOSE: To simplify the video signal compounding circuit by forming the horizontal and vertical synchronous signals plus the picture element frequency signal from the same reference frequency signal, and at the same time realizing setting of the video signal effective period formed by the optional picture element frequency.
CONSTITUTION: Reference frequency signal fC oscillated from oscillator 10 is divided through divider 11 to deliver horizontal synchronous signal fH. Signal fH is applied to control signal generation circuit 16 comprising FF as well as to video signal compounding circuit 19. Furthermore, signal fH is divided through divider 12 to deliver vertical synchronous signal fV to the output, and signal fV is then supplied to circuit 19. At the same time, switch circuit 15 is controlled by the output signal which is triggered by the output of circuit 16, and phase-inverted signal fC and fC' are selected and delivered with every horizontal period from circuit 15. The output of circuit 15 is divided through divider 17 to be applied to circuit 19 in the form of the fixed picture element signal. Thus the compounding circuit can be simplified, and at the same time the selection is possible for the video signals formed with the optional picture element frequency.
COPYRIGHT: (C)1980,JPO&Japio
JP9280178A 1978-07-29 1978-07-29 How to combine video signals Expired JPS585626B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9280178A JPS585626B2 (en) 1978-07-29 1978-07-29 How to combine video signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9280178A JPS585626B2 (en) 1978-07-29 1978-07-29 How to combine video signals

Publications (2)

Publication Number Publication Date
JPS5520045A true JPS5520045A (en) 1980-02-13
JPS585626B2 JPS585626B2 (en) 1983-02-01

Family

ID=14064507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9280178A Expired JPS585626B2 (en) 1978-07-29 1978-07-29 How to combine video signals

Country Status (1)

Country Link
JP (1) JPS585626B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59231604A (en) * 1983-06-14 1984-12-26 Hitachi Ltd Operation control method for thermal power plant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59231604A (en) * 1983-06-14 1984-12-26 Hitachi Ltd Operation control method for thermal power plant

Also Published As

Publication number Publication date
JPS585626B2 (en) 1983-02-01

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