JPS55123276A - Synchronizing signal separation system - Google Patents

Synchronizing signal separation system

Info

Publication number
JPS55123276A
JPS55123276A JP3074879A JP3074879A JPS55123276A JP S55123276 A JPS55123276 A JP S55123276A JP 3074879 A JP3074879 A JP 3074879A JP 3074879 A JP3074879 A JP 3074879A JP S55123276 A JPS55123276 A JP S55123276A
Authority
JP
Japan
Prior art keywords
signal
circuit
output signal
synchronizing signal
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.)
Granted
Application number
JP3074879A
Other languages
Japanese (ja)
Other versions
JPS6145914B2 (en
Inventor
Sadafumi Kitamura
Hiroshi Taniguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP3074879A priority Critical patent/JPS55123276A/en
Publication of JPS55123276A publication Critical patent/JPS55123276A/en
Publication of JPS6145914B2 publication Critical patent/JPS6145914B2/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
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Abstract

PURPOSE:To obtain a normal synchronizing signal by detecting a falling part from white to dark and then by inhibiting the output signal of a synchronizing signal separating circuit for a certain time from the falling position. CONSTITUTION:This system consists of video signal level detecting circuit 13, monostable multivibrator 14 and inhibiting circuit 15. Output signal (a) of LPF2 which removes a high frequency component from a color video signal is supplied to both synchronizing signal separating circuit 3 and circuit 13. Circuit 3 extracts a synchronizing signal part from the video signal according to detection level A to output signal (b). Circuit 13, on the other hand, detects a signal by 2nd detection level B, which detects a component higher than a prescribed reference level in signal (a), to output signal (c). Monostable multivibrator 14 is triggered at the fall of signal (c) to output signal (d) and circuit 15 inhibits signal (b) by signal (d) to output signal (e) from circuit 15. This signal (e) is a normal synchronizing signal.
JP3074879A 1979-03-15 1979-03-15 Synchronizing signal separation system Granted JPS55123276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3074879A JPS55123276A (en) 1979-03-15 1979-03-15 Synchronizing signal separation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3074879A JPS55123276A (en) 1979-03-15 1979-03-15 Synchronizing signal separation system

Publications (2)

Publication Number Publication Date
JPS55123276A true JPS55123276A (en) 1980-09-22
JPS6145914B2 JPS6145914B2 (en) 1986-10-11

Family

ID=12312294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3074879A Granted JPS55123276A (en) 1979-03-15 1979-03-15 Synchronizing signal separation system

Country Status (1)

Country Link
JP (1) JPS55123276A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0224383A (en) * 1988-07-14 1990-01-26 Arao Sakurai Pocketable chemical body warmer

Also Published As

Publication number Publication date
JPS6145914B2 (en) 1986-10-11

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