FR2456446A1 - SIGNAL PROCESSING CIRCUIT HAVING NON-LINEAR TRANSFER FUNCTION - Google Patents

SIGNAL PROCESSING CIRCUIT HAVING NON-LINEAR TRANSFER FUNCTION

Info

Publication number
FR2456446A1
FR2456446A1 FR8010438A FR8010438A FR2456446A1 FR 2456446 A1 FR2456446 A1 FR 2456446A1 FR 8010438 A FR8010438 A FR 8010438A FR 8010438 A FR8010438 A FR 8010438A FR 2456446 A1 FR2456446 A1 FR 2456446A1
Authority
FR
France
Prior art keywords
output
input
signal processing
processing circuit
amplifier
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
FR8010438A
Other languages
French (fr)
Inventor
William Adamson Lagoni
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of FR2456446A1 publication Critical patent/FR2456446A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/26—Arbitrary function generators
    • G06G7/28—Arbitrary function generators for synthesising functions by piecewise approximation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)

Abstract

LA PRESENTE INVENTION CONCERNE UN CIRCUIT DE TRAITEMENT DE SIGNAUX VIDEO AYANT UN AMPLIFICATEUR AVEC UNE BORNE D'ENTREE ET UNE BORNE DE SORTIE. SELON L'INVENTION, ON PREVOIT UN PREMIER TRAJET DE CONTRE-REACTION ENTRE L'ENTREE ET LA SORTIE DE L'AMPLIFICATEUR 75, COMPORTANT UNE PREMIERE IMPEDANCE 76, ET UN SECOND TRAJET DE CONTRE-REACTION ENTRE CETTE SORTIE ET CETTE ENTREE, COMPORTANT UNE SECONDE IMPEDANCE 87 ET UN RESEAU DE COMMUTATION DE CONDUCTION A SEUIL 81, 82 AYANT UNE ENTREE RELIEE A LA SORTIE DE L'AMPLIFICATEUR ET UNE SORTIE RELIEE A LA BORNE D'ENTREE; LE RESEAU DE COMMUTATION PRESENTE UN ETAT CONDUCTEUR EN REPONSE A DES AMPLITUDES A DES PREMIERES GRANDEURS DANS UNE PREMIERE PLAGE ET PRESENTE UN AUTRE ETAT CONDUCTEUR EN REPONSE A DES AMPLITUDES A DES SECONDES GRANDEURS SUPERIEURES AUX PREMIERES DANS UNE SECONDE PLAGE. L'INVENTION S'APPLIQUE NOTAMMENT A LA TELEVISION EN COULEURS.THE PRESENT INVENTION CONCERNS A VIDEO SIGNAL PROCESSING CIRCUIT HAVING AN AMPLIFIER WITH AN INPUT TERMINAL AND AN OUTPUT TERMINAL. ACCORDING TO THE INVENTION, A FIRST FEEDBACK PATH BETWEEN THE INPUT AND THE OUTPUT OF THE AMPLIFIER 75, INCLUDING A FIRST IMPEDANCE 76, AND A SECOND FEEDBACK BETWEEN THIS OUTPUT AND THIS INPUT, IS PROVIDED FOR. SECOND IMPEDANCE 87 AND A THRESHOLD CONDUCTION SWITCHING NETWORK 81, 82 HAVING AN INPUT CONNECTED TO THE OUTPUT OF THE AMPLIFIER AND AN OUTPUT CONNECTED TO THE INPUT TERMINAL; THE SWITCHING NETWORK SHOWS A CONDUCTIVE STATE IN RESPONSE TO AMPLITUDES AT FIRST QUANTITIES IN A FIRST RANGE AND PRESENTS ANOTHER CONDUCTIVE STATE IN RESPONSE TO AMPLITUDES AT SECOND QUANTITIES GREATER THAN THE FIRST IN A SECOND RANGE. THE INVENTION APPLIES IN PARTICULAR TO COLOR TELEVISION.

FR8010438A 1979-05-11 1980-05-09 SIGNAL PROCESSING CIRCUIT HAVING NON-LINEAR TRANSFER FUNCTION Pending FR2456446A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3810079A 1979-05-11 1979-05-11

Publications (1)

Publication Number Publication Date
FR2456446A1 true FR2456446A1 (en) 1980-12-05

Family

ID=21898092

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8010438A Pending FR2456446A1 (en) 1979-05-11 1980-05-09 SIGNAL PROCESSING CIRCUIT HAVING NON-LINEAR TRANSFER FUNCTION

Country Status (8)

Country Link
JP (1) JPS55156488A (en)
KR (1) KR830002655B1 (en)
CA (1) CA1143828A (en)
DE (1) DE3017929C2 (en)
FR (1) FR2456446A1 (en)
GB (1) GB2049347B (en)
IT (1) IT8021964A0 (en)
MY (1) MY8500725A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4612567A (en) * 1984-05-03 1986-09-16 Rca Corporation Television receiver using non-interlaced scanning format with vertical detail enhancement and motion compensation
MY110211A (en) * 1992-06-17 1998-02-28 Rca Thomson Licensing Corp Kinescope driver apparatus with contrast enhancement.
WO2005101658A1 (en) * 2004-04-15 2005-10-27 Koninklijke Philips Electronics N.V. Analogue non-linear dynamic filter

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3715477A (en) * 1971-03-11 1973-02-06 Rca Corp Video signal noise-limiting apparatus
DE2264282A1 (en) * 1972-12-30 1974-07-04 Bosch Fernsehanlagen CIRCUIT ARRANGEMENT WITH NON-LINEAR TRANSMISSION CHARACTERISTIC FOR TELEVISION SIGNALS
US4143397A (en) * 1976-04-19 1979-03-06 Rca Corporation Comb filter apparatus
US4096516A (en) * 1977-03-25 1978-06-20 Rca Corporation Electronic signal processing apparatus

Also Published As

Publication number Publication date
IT8021964A0 (en) 1980-05-09
KR830004027A (en) 1983-06-30
GB2049347A (en) 1980-12-17
JPS6133501B2 (en) 1986-08-02
JPS55156488A (en) 1980-12-05
CA1143828A (en) 1983-03-29
DE3017929A1 (en) 1980-11-20
GB2049347B (en) 1983-04-27
DE3017929C2 (en) 1985-02-14
MY8500725A (en) 1985-12-31
KR830002655B1 (en) 1983-12-06

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