JPS5745784A - Noise suppressing circuit - Google Patents

Noise suppressing circuit

Info

Publication number
JPS5745784A
JPS5745784A JP55120203A JP12020380A JPS5745784A JP S5745784 A JPS5745784 A JP S5745784A JP 55120203 A JP55120203 A JP 55120203A JP 12020380 A JP12020380 A JP 12020380A JP S5745784 A JPS5745784 A JP S5745784A
Authority
JP
Japan
Prior art keywords
noise
signal
circuit
synchronizing
tip
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
JP55120203A
Other languages
Japanese (ja)
Inventor
Masayuki Takano
Ichitaro Sato
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 JP55120203A priority Critical patent/JPS5745784A/en
Publication of JPS5745784A publication Critical patent/JPS5745784A/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
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/911—Television signal processing therefor for the suppression of noise

Landscapes

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

Abstract

PURPOSE:To suppress noise between synchronization tip and pedestal without hindrance by synchronizing signal by detecting noise at the first threshold level within the tip of synchronizing signal and further detecting noise at the second threshold level at synchronizing signal part. CONSTITUTION:Regenerated video signal (a) from a VTR is 1H delayed by a 1H delay circuit 2 and supplied to a noise slicing circuit 3. Further, the signal (a) is inputted to another noise slicing circuit 4. In these circuits 3, 4, noise component extending beyond the tip of synchronizing signal of the signal (a) is sliced, and the synchronizing signal is separated by a synchronizing separation circuit 5. Clamp pulse (c) of respective pedestal part and suppressing pulse (d) of horizontal synchronizing part are added to a noise detecting circuit 10. On the other hand, the signal (a) is added to the circuit 10 and a changeover switch 11. Noise is detected by comparing the noise within the tip of synchronizing signal and synchronizing part with the first and second threshold levels and noise is eliminated by controlling a switch 11 by output of the circuit 10.
JP55120203A 1980-08-30 1980-08-30 Noise suppressing circuit Pending JPS5745784A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55120203A JPS5745784A (en) 1980-08-30 1980-08-30 Noise suppressing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55120203A JPS5745784A (en) 1980-08-30 1980-08-30 Noise suppressing circuit

Publications (1)

Publication Number Publication Date
JPS5745784A true JPS5745784A (en) 1982-03-15

Family

ID=14780449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55120203A Pending JPS5745784A (en) 1980-08-30 1980-08-30 Noise suppressing circuit

Country Status (1)

Country Link
JP (1) JPS5745784A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369892A2 (en) * 1988-11-18 1990-05-23 Sony Corporation Dropout detecting circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542412A (en) * 1977-05-26 1979-01-10 Beloit Corp Method and apparatus for producing creped tissue
JPS542412B1 (en) * 1970-08-25 1979-02-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS542412B1 (en) * 1970-08-25 1979-02-07
JPS542412A (en) * 1977-05-26 1979-01-10 Beloit Corp Method and apparatus for producing creped tissue

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0369892A2 (en) * 1988-11-18 1990-05-23 Sony Corporation Dropout detecting circuit

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