FR2400298A1 - MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY - Google Patents

MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY

Info

Publication number
FR2400298A1
FR2400298A1 FR7724740A FR7724740A FR2400298A1 FR 2400298 A1 FR2400298 A1 FR 2400298A1 FR 7724740 A FR7724740 A FR 7724740A FR 7724740 A FR7724740 A FR 7724740A FR 2400298 A1 FR2400298 A1 FR 2400298A1
Authority
FR
France
Prior art keywords
filtering equipment
reproduction
video signals
frequency
reduce noise
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.)
Withdrawn
Application number
FR7724740A
Other languages
French (fr)
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.)
ELEKTROTECHNIK EISENACH KOM
Original Assignee
ELEKTROTECHNIK EISENACH KOM
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
Priority to DD76194043A priority Critical patent/DD139378A1/en
Priority to DE19772731567 priority patent/DE2731567A1/en
Priority to NL7708253A priority patent/NL7708253A/en
Priority to GB31155/77A priority patent/GB1586875A/en
Application filed by ELEKTROTECHNIK EISENACH KOM filed Critical ELEKTROTECHNIK EISENACH KOM
Priority to FR7724740A priority patent/FR2400298A1/en
Publication of FR2400298A1 publication Critical patent/FR2400298A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/24—Automatic control in frequency-selective amplifiers
    • 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

Abstract

Montage permettant de réduire le bruit de signaux et comprenant un équipement de filtrage susceptible d'être commandé, un circuit à retard étant monté en série avec l'équipement de filtrage et une première branche de commande, destinée à influencer l'équipement de filtrage en cas de variations de fréquence d'entrée lentes, étant connectée à l'entrée du circuit à retard. Outre la première branche de commande 5 il est prévu une seconde branche de commande qui, en cas de variations de fréquence d'entrée lentes, commande l'équipement de filtrage 2. L'invention est applicable en particulier à la reproduction et la transmission de signaux vidéo.Circuitry for reducing signal noise and comprising controllable filtering equipment, a delay circuit being connected in series with the filtering equipment and a first control branch for influencing the filtering equipment in case of slow input frequency variations, being connected to the input of the delay circuit. In addition to the first control branch 5 there is provided a second control branch which, in the event of slow input frequency variations, controls the filtering equipment 2. The invention is applicable in particular to the reproduction and transmission of video signals.

FR7724740A 1976-07-26 1977-08-11 MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY Withdrawn FR2400298A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DD76194043A DD139378A1 (en) 1976-07-26 1976-07-26 CIRCUIT ARRANGEMENT FOR NOISE REDUCTION, IN PARTICULAR IN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, WITH A FREQUENCY-RELATED FILTER ARRANGEMENT
DE19772731567 DE2731567A1 (en) 1976-07-26 1977-07-13 CIRCUIT ARRANGEMENT FOR NOISE REDUCTION, ESPECIALLY WHEN PLAYING RECORDED VIDEO SIGNALS, WITH A FREQUENCY-DEPENDENT FILTER ARRANGEMENT
NL7708253A NL7708253A (en) 1976-07-26 1977-07-25 NOISE REDUCTION CIRCUIT, ESPECIALLY WHEN PLAYING RECORDED VIDEO SIGNALS, WITH A FREQUENCY DEPENDENT FILTER CIRCUIT.
GB31155/77A GB1586875A (en) 1976-07-26 1977-07-25 Reducing noise in the playback of recorded video signals
FR7724740A FR2400298A1 (en) 1976-07-26 1977-08-11 MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD76194043A DD139378A1 (en) 1976-07-26 1976-07-26 CIRCUIT ARRANGEMENT FOR NOISE REDUCTION, IN PARTICULAR IN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, WITH A FREQUENCY-RELATED FILTER ARRANGEMENT
FR7724740A FR2400298A1 (en) 1976-07-26 1977-08-11 MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY

Publications (1)

Publication Number Publication Date
FR2400298A1 true FR2400298A1 (en) 1979-03-09

Family

ID=25747573

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7724740A Withdrawn FR2400298A1 (en) 1976-07-26 1977-08-11 MOUNTING INTENDED TO REDUCE NOISE, IN PARTICULAR WHEN THE REPRODUCTION OF RECORDED VIDEO SIGNALS, AND INCLUDING FILTERING EQUIPMENT ACTING ACCORDING TO THE FREQUENCY

Country Status (5)

Country Link
DD (1) DD139378A1 (en)
DE (1) DE2731567A1 (en)
FR (1) FR2400298A1 (en)
GB (1) GB1586875A (en)
NL (1) NL7708253A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048661A1 (en) * 1980-09-16 1982-03-31 Thomson-Lgt Laboratoire General Des Telecommunications Demodulator for a frequency-modulated signal
US4459621A (en) * 1980-12-29 1984-07-10 Universal Pioneer Corporation High frequency crosstalk eliminating circuit in video disc reproducing device

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57168593A (en) * 1981-01-28 1982-10-16 Toshiba Corp Wide-band color demodulator
US4472733A (en) * 1982-09-01 1984-09-18 Rca Corporation Color channel signal-to-noise improvement in digital television
JPS62175025A (en) † 1986-01-25 1987-07-31 Fujitsu Ten Ltd Noise eliminator
KR920007491Y1 (en) * 1989-12-31 1992-10-15 삼성전자 주식회사 High quality video recording circuit
DE19546406C1 (en) * 1995-12-12 1997-05-22 Becker Gmbh Digital IF filter circuit for FM receiver

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488359A (en) * 1940-03-11 1949-11-15 Hazeltine Research Inc Frequency-modulated carrier signal receiver
US3288930A (en) * 1964-11-12 1966-11-29 Winston Res Corp Wide-band signal-translating channel
US3333055A (en) * 1963-06-01 1967-07-25 Fernseh Gmbh Apparatus for increasing the signal-to-noise ratio of a television signal
FR2032118A5 (en) * 1969-02-19 1970-11-20 Thomson Csf
US3872387A (en) * 1972-09-29 1975-03-18 Zenith Radio Corp Frequency response modifier for fixed-tuned IF amplifiers
US4015076A (en) * 1964-06-17 1977-03-29 Sony Corporation Noise eliminating circuit for video television signal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2488359A (en) * 1940-03-11 1949-11-15 Hazeltine Research Inc Frequency-modulated carrier signal receiver
US3333055A (en) * 1963-06-01 1967-07-25 Fernseh Gmbh Apparatus for increasing the signal-to-noise ratio of a television signal
US4015076A (en) * 1964-06-17 1977-03-29 Sony Corporation Noise eliminating circuit for video television signal
US3288930A (en) * 1964-11-12 1966-11-29 Winston Res Corp Wide-band signal-translating channel
FR2032118A5 (en) * 1969-02-19 1970-11-20 Thomson Csf
US3872387A (en) * 1972-09-29 1975-03-18 Zenith Radio Corp Frequency response modifier for fixed-tuned IF amplifiers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048661A1 (en) * 1980-09-16 1982-03-31 Thomson-Lgt Laboratoire General Des Telecommunications Demodulator for a frequency-modulated signal
US4458207A (en) * 1980-09-16 1984-07-03 Thomson-Csf FM Demodulator with variable bandpass filter
US4459621A (en) * 1980-12-29 1984-07-10 Universal Pioneer Corporation High frequency crosstalk eliminating circuit in video disc reproducing device

Also Published As

Publication number Publication date
GB1586875A (en) 1981-03-25
DD139378A1 (en) 1979-12-27
DE2731567A1 (en) 1978-02-02
NL7708253A (en) 1978-01-30

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Legal Events

Date Code Title Description
ST Notification of lapse