FR2434537A1 - MOUNTING FOR THE REPRODUCTION OF COLOR TELEVISION SIGNALS - Google Patents

MOUNTING FOR THE REPRODUCTION OF COLOR TELEVISION SIGNALS

Info

Publication number
FR2434537A1
FR2434537A1 FR7905643A FR7905643A FR2434537A1 FR 2434537 A1 FR2434537 A1 FR 2434537A1 FR 7905643 A FR7905643 A FR 7905643A FR 7905643 A FR7905643 A FR 7905643A FR 2434537 A1 FR2434537 A1 FR 2434537A1
Authority
FR
France
Prior art keywords
line
polarity
lines
reproduction
frequency
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
FR7905643A
Other languages
French (fr)
Other versions
FR2434537B3 (en
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.)
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Original Assignee
Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
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 Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH filed Critical Grundig EMV Elektromechanische Versuchsanstalt Max Grundig GmbH
Publication of FR2434537A1 publication Critical patent/FR2434537A1/en
Application granted granted Critical
Publication of FR2434537B3 publication Critical patent/FR2434537B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
    • H04N9/84—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal the recorded signal showing a feature, which is different in adjacent track parts, e.g. different phase or frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

Montage pour la reproduction de signaux de télévision en couleurs qui sont enregistrés en pistes obliques à haute densité avec un décalage de ligne de 1,5 ligne et dont le signal de chrominance porté par une fréquence porteuse subit une inversion de polarité toutes les quatre lignes pendant l'enregistrement et un rétablissement de polarité toutes les quatre lignes pendant la reproduction, ce signal étant transmis par l'intermédiaire d'un filtre à << peigne >> comportant une ligne à retard dont le retard correspond à la durée de deux lignes, la tension de commande utilisée pour l'inversion de la polarité et le rétablissement de la polarité étant produite par une division correspondante de la fréquence de ligne, ce montage étant caractérisé en ce qu'une impulsion additionnelle est rajoutée, à intervalles de temps déterminés, aux impulsions de ligne transmises à un diviseur 14 lorsque le signal de synchronisation de couleur filtré à la sortie du filtre à << peigne >> 7 ne présente pas de composantes possédant une fréquence égale à la moitié de la fréquence de ligne.Editing for the reproduction of color television signals which are recorded in high density oblique tracks with a line shift of 1.5 lines and whose chrominance signal carried by a carrier frequency undergoes a polarity inversion every four lines for recording and re-polarity every four lines during reproduction, this signal being transmitted through a "comb" filter comprising a delay line whose delay corresponds to the duration of two lines, the control voltage used for the reversal of the polarity and the re-establishment of the polarity being produced by a corresponding division of the line frequency, this assembly being characterized in that an additional pulse is added, at determined time intervals, to line pulses transmitted to a divider 14 when the filtered color sync signal at the output of the "comb" filter 7 shows no components having a frequency equal to half of the line frequency.

FR7905643A 1978-07-05 1979-03-05 MOUNTING FOR THE REPRODUCTION OF COLOR TELEVISION SIGNALS Granted FR2434537A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782829410 DE2829410C2 (en) 1978-07-05 1978-07-05 Circuit arrangement for reproducing color television signals

Publications (2)

Publication Number Publication Date
FR2434537A1 true FR2434537A1 (en) 1980-03-21
FR2434537B3 FR2434537B3 (en) 1981-12-04

Family

ID=6043525

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7905643A Granted FR2434537A1 (en) 1978-07-05 1979-03-05 MOUNTING FOR THE REPRODUCTION OF COLOR TELEVISION SIGNALS

Country Status (4)

Country Link
AT (1) AT373113B (en)
DE (1) DE2829410C2 (en)
FR (1) FR2434537A1 (en)
GB (1) GB2025186B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3314873A1 (en) * 1982-11-18 1984-10-31 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Method for testing whether a videotape has been copied
DE3242558A1 (en) * 1982-11-18 1984-07-26 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Method for checking a video tape for a copy made

Also Published As

Publication number Publication date
GB2025186B (en) 1982-09-22
ATA46079A (en) 1983-04-15
DE2829410B1 (en) 1979-11-15
GB2025186A (en) 1980-01-16
FR2434537B3 (en) 1981-12-04
AT373113B (en) 1983-12-27
DE2829410C2 (en) 1980-07-17

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