JPS57212883A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
JPS57212883A
JPS57212883A JP56098962A JP9896281A JPS57212883A JP S57212883 A JPS57212883 A JP S57212883A JP 56098962 A JP56098962 A JP 56098962A JP 9896281 A JP9896281 A JP 9896281A JP S57212883 A JPS57212883 A JP S57212883A
Authority
JP
Japan
Prior art keywords
signal
head
adder
noise component
demodulation
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
JP56098962A
Other languages
Japanese (ja)
Inventor
Akira Hirota
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor KK
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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56098962A priority Critical patent/JPS57212883A/en
Publication of JPS57212883A publication Critical patent/JPS57212883A/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)

Abstract

PURPOSE:To simplify the circuit constitution, by providing a head which simultaneously reproduces two video signals having a time difference of a multiple of one field period from a recording medium and separating noise component through the level difference of both the video signals. CONSTITUTION:A main head gap 8a and a sub-head gap 8b are provided and a video signal shifted by almost one field is reproduced from a magnetic tape 7. A video signal from the main head 8a passes through a preamplifier 9a and a high pass filter 10a, where a luminance signal is separated, and the result is demodulated at an FM demodulator 11a and applied to adders 12 and 13. Similarly, the luminance signal is separated from a video signal from the sub-head 8b, and after FM demodulation the signal is added with in opposite phase with a demodulation signal from the FM demodulator 11a to an adder 12. Noise component is picked up without field correlation at the adder 12 and applied to the adder 13 via a limiter 14, a high pass filter 15 and an attenuator 16 to reject noise component from the FM demodulation signal.
JP56098962A 1981-06-25 1981-06-25 Noise reduction circuit Pending JPS57212883A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56098962A JPS57212883A (en) 1981-06-25 1981-06-25 Noise reduction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56098962A JPS57212883A (en) 1981-06-25 1981-06-25 Noise reduction circuit

Publications (1)

Publication Number Publication Date
JPS57212883A true JPS57212883A (en) 1982-12-27

Family

ID=14233690

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56098962A Pending JPS57212883A (en) 1981-06-25 1981-06-25 Noise reduction circuit

Country Status (1)

Country Link
JP (1) JPS57212883A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6030678U (en) * 1983-08-08 1985-03-01 ソニー株式会社 Digital video disc playback device
JPS61157193A (en) * 1984-12-28 1986-07-16 Victor Co Of Japan Ltd Video signal reproducing device
JPS6380687A (en) * 1986-09-24 1988-04-11 Nec Home Electronics Ltd Cyclic type noise reducing device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834512A (en) * 1971-09-06 1973-05-19
JPS5195716A (en) * 1975-02-20 1976-08-21
JPS5453923A (en) * 1977-10-07 1979-04-27 Sony Corp Noise eliminating circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4834512A (en) * 1971-09-06 1973-05-19
JPS5195716A (en) * 1975-02-20 1976-08-21
JPS5453923A (en) * 1977-10-07 1979-04-27 Sony Corp Noise eliminating circuit

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6030678U (en) * 1983-08-08 1985-03-01 ソニー株式会社 Digital video disc playback device
JPH0210709Y2 (en) * 1983-08-08 1990-03-16
JPS61157193A (en) * 1984-12-28 1986-07-16 Victor Co Of Japan Ltd Video signal reproducing device
JPS6380687A (en) * 1986-09-24 1988-04-11 Nec Home Electronics Ltd Cyclic type noise reducing device

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