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JPS5696579A - Vertical synchronizing separation circuit - Google Patents

Vertical synchronizing separation circuit

Info

Publication number
JPS5696579A
JPS5696579A JP17174279A JP17174279A JPS5696579A JP S5696579 A JPS5696579 A JP S5696579A JP 17174279 A JP17174279 A JP 17174279A JP 17174279 A JP17174279 A JP 17174279A JP S5696579 A JPS5696579 A JP S5696579A
Authority
JP
Japan
Prior art keywords
signal
synchronizing signal
period
sync
window
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
JP17174279A
Other languages
Japanese (ja)
Other versions
JPS648951B2 (en
Inventor
Mitsutoshi Magai
Masaaki Sakai
Kenji Nakano
Tadahiko Nakamura
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP17174279A priority Critical patent/JPS5696579A/en
Priority to GB8040934A priority patent/GB2067054B/en
Priority to AU65673/80A priority patent/AU535411B2/en
Priority to DE19803048539 priority patent/DE3048539A1/en
Priority to FR8027356A priority patent/FR2472893B1/en
Priority to AT0633280A priority patent/AT385381B/en
Priority to NL8007081A priority patent/NL192178C/en
Publication of JPS5696579A publication Critical patent/JPS5696579A/en
Priority to US06/418,069 priority patent/US4459612A/en
Publication of JPS648951B2 publication Critical patent/JPS648951B2/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
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To make easy circuit integration, to remove broad noise, to prevent malfunction and to increase the accuracy, by detecting the level of synthesized synchronizing signal at window period and obtaining the output without level change. CONSTITUTION:To an input terminal 63, synthesized synchronizing signal SYNC including signals such as horizontal synchronizing signal HD, equalizing pulses EQ, EQ', and vertical synchronizing signal VD0 is fed, and a vertical synchronizing signal VD is obtained at an output terminal 64 and it is output as the pulse indicating a given location of the period of the synchronizing signal VD0. From the position where the signal SYNC is at low level, the window signal to detect the vertical signal and noise is made. Whether or not the SYNC is at high level during the window period is detected, and the period, for example, 4 consecutive period, are regarded as the signal VD0. Thus, circuit integration is made easy, the malfunction against broad noise is avoided and the accuracy can be increased.
JP17174279A 1979-12-29 1979-12-29 Vertical synchronizing separation circuit Granted JPS5696579A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP17174279A JPS5696579A (en) 1979-12-29 1979-12-29 Vertical synchronizing separation circuit
GB8040934A GB2067054B (en) 1979-12-29 1980-12-22 Synchronizing signal detecting circuits
AU65673/80A AU535411B2 (en) 1979-12-29 1980-12-22 Synchronizing signal detector
DE19803048539 DE3048539A1 (en) 1979-12-29 1980-12-22 "SIGNAL TESTING, IN PARTICULAR FOR SYNCHRONOUS SIGNALS IN THE SERVO CIRCUIT OF A VIDEO RECORDING DEVICE"
FR8027356A FR2472893B1 (en) 1979-12-29 1980-12-23 PULSE DETECTION CIRCUIT, PARTICULARLY FOR A MAGNETOSCOPE
AT0633280A AT385381B (en) 1979-12-29 1980-12-29 DIGITAL SWITCHING
NL8007081A NL192178C (en) 1979-12-29 1980-12-29 Digital circuit for generating a noise-free vertical synchronization signal.
US06/418,069 US4459612A (en) 1979-12-29 1982-09-14 Vertical synchronizing signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17174279A JPS5696579A (en) 1979-12-29 1979-12-29 Vertical synchronizing separation circuit

Publications (2)

Publication Number Publication Date
JPS5696579A true JPS5696579A (en) 1981-08-04
JPS648951B2 JPS648951B2 (en) 1989-02-15

Family

ID=15928837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17174279A Granted JPS5696579A (en) 1979-12-29 1979-12-29 Vertical synchronizing separation circuit

Country Status (1)

Country Link
JP (1) JPS5696579A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833364A (en) * 1981-08-21 1983-02-26 Matsushita Electric Ind Co Ltd Separating circuit of vertical synchronizing signal
JPS63193780A (en) * 1987-02-06 1988-08-11 Sony Corp Vertical synchronizing signal detection device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01155953A (en) * 1987-12-14 1989-06-19 Chiyoda Corp Separation of starting material for superconductor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017920A (en) * 1973-06-19 1975-02-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5017920A (en) * 1973-06-19 1975-02-25

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5833364A (en) * 1981-08-21 1983-02-26 Matsushita Electric Ind Co Ltd Separating circuit of vertical synchronizing signal
JPH0217984B2 (en) * 1981-08-21 1990-04-24 Matsushita Electric Ind Co Ltd
JPS63193780A (en) * 1987-02-06 1988-08-11 Sony Corp Vertical synchronizing signal detection device

Also Published As

Publication number Publication date
JPS648951B2 (en) 1989-02-15

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