JPS5718165A - Television synchronizing signal separation system - Google Patents

Television synchronizing signal separation system

Info

Publication number
JPS5718165A
JPS5718165A JP9358980A JP9358980A JPS5718165A JP S5718165 A JPS5718165 A JP S5718165A JP 9358980 A JP9358980 A JP 9358980A JP 9358980 A JP9358980 A JP 9358980A JP S5718165 A JPS5718165 A JP S5718165A
Authority
JP
Japan
Prior art keywords
counting
signal
synchronizing signal
separated
vertical synchronizing
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
JP9358980A
Other languages
Japanese (ja)
Inventor
Yoshitaka Katayama
Daiki Nabeshima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP9358980A priority Critical patent/JPS5718165A/en
Publication of JPS5718165A publication Critical patent/JPS5718165A/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
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Abstract

PURPOSE:To recognize a vertical synchronizing signal and to separated the vertical synchronizing signal, by detecting an equalizing pulse width and its period, and also counting and deciding the number of times of a sequence of its prescribed relation. CONSTITUTION:A television signal is inputted to a comparator 12 whose threshold level has been set by a reference electric power source 11, and is synchronization- separated. The signal which has been synchronization-separated in provided to a synchronizing separator 13, and also, on the one hand, it is applied to a reset terminal of the first counting circuit 14 for counting a high speed clock, and on the other hand, it is reversed through an inverter 15 and is applied to a reset terminal of the second counting circuit 16 for counting a high speed clock. The counting circuits 14, 16 count complementarily in a ''1'' level period and a ''0'' level period of an output of the comparator 12. A counting circuit 19 counts only in case when a synchronizing separation signal is being detecte, and when it has attained to a prescribed value, it is detected and is outputted as a vertical synchronizing signal.
JP9358980A 1980-07-09 1980-07-09 Television synchronizing signal separation system Pending JPS5718165A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9358980A JPS5718165A (en) 1980-07-09 1980-07-09 Television synchronizing signal separation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9358980A JPS5718165A (en) 1980-07-09 1980-07-09 Television synchronizing signal separation system

Publications (1)

Publication Number Publication Date
JPS5718165A true JPS5718165A (en) 1982-01-29

Family

ID=14086473

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9358980A Pending JPS5718165A (en) 1980-07-09 1980-07-09 Television synchronizing signal separation system

Country Status (1)

Country Link
JP (1) JPS5718165A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276869A (en) * 1985-09-30 1987-04-08 Fujitsu Micom Syst Kk Synchronizing separator circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6276869A (en) * 1985-09-30 1987-04-08 Fujitsu Micom Syst Kk Synchronizing separator circuit
JPH0327144B2 (en) * 1985-09-30 1991-04-15 Fujitsu Maikon Shisutemuzu Kk

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