FR2357130A1 - Systeme pour enregistrer et reproduire des signaux de television - Google Patents

Systeme pour enregistrer et reproduire des signaux de television

Info

Publication number
FR2357130A1
FR2357130A1 FR7719985A FR7719985A FR2357130A1 FR 2357130 A1 FR2357130 A1 FR 2357130A1 FR 7719985 A FR7719985 A FR 7719985A FR 7719985 A FR7719985 A FR 7719985A FR 2357130 A1 FR2357130 A1 FR 2357130A1
Authority
FR
France
Prior art keywords
chrominance components
recorded
lagged
playback
reference signals
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Withdrawn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
FR7719985A
Other languages
English (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.)
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 FR2357130A1 publication Critical patent/FR2357130A1/fr
Withdrawn legal-status Critical Current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)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

L'invention concerne un système d'enregistrement et de reproduction de signaux de télévision sur une bande magnétique ayant des pistes adjacentes. Selon l'invention, la possibilité d'une interférence ou d'une diaphonie entre des composantes de chrominance lors de la restitution, du fait de la proximité des pistes adjacentes est supprimée en faisant varier la phase de la fréquence de la porteuse d'enregistrement associée à l'information de chrominance en progression de phase ligne par ligne dans un groupe de pistes et en régression de phase ligne par ligne dans l'autre groupe de pistes. Pendant la restitution, un mélangeur 24 dont la fréquence centrale est déphasée en synchronisme avec la séquence de phase variable du signal enregistré, reconstitue la sous-porteuse de chrominance souhaitée. Un filtre en peigne 26, 28 formé d'une ligne à retard 1H et d'un moyen de soustraction de signaux est utilisé pour laisser passer le signal souhaité tout en rejetant les composantes de diaphonie. L'invention s'applique notamment aux téléviseurs couleurs.
FR7719985A 1976-06-30 1977-06-29 Systeme pour enregistrer et reproduire des signaux de television Withdrawn FR2357130A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70141576A 1976-06-30 1976-06-30

Publications (1)

Publication Number Publication Date
FR2357130A1 true FR2357130A1 (fr) 1978-01-27

Family

ID=24817287

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7719985A Withdrawn FR2357130A1 (fr) 1976-06-30 1977-06-29 Systeme pour enregistrer et reproduire des signaux de television

Country Status (5)

Country Link
JP (1) JPS534421A (fr)
AU (1) AU2633677A (fr)
DE (1) DE2729652A1 (fr)
FR (1) FR2357130A1 (fr)
IT (1) IT1077241B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410928A1 (fr) * 1977-12-02 1979-06-29 Philips Nv Procedes d'enregistrement et de reproduction de signaux de television couleur et appareil pour la mise en application desdits procedes
EP0429926A2 (fr) * 1989-11-30 1991-06-05 Nokia (Deutschland) GmbH Circuit pour regagner le signal de chrominance

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5437802B2 (fr) * 1974-05-20 1979-11-17
JPS5358224A (en) * 1976-11-05 1978-05-26 Matsushita Electric Ind Co Ltd Composite diaphragm for speakers
DE2830168C2 (de) * 1978-07-08 1985-10-24 Philips Patentverwaltung Gmbh, 2000 Hamburg Schaltungsanordnung zum Detektieren einer Umschalt-Phasenlage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2410928A1 (fr) * 1977-12-02 1979-06-29 Philips Nv Procedes d'enregistrement et de reproduction de signaux de television couleur et appareil pour la mise en application desdits procedes
EP0429926A2 (fr) * 1989-11-30 1991-06-05 Nokia (Deutschland) GmbH Circuit pour regagner le signal de chrominance
EP0429926A3 (en) * 1989-11-30 1992-08-05 Nokia Unterhaltungselektronik (Deutschland) Gmbh Circuit for regaining the chrominance signal

Also Published As

Publication number Publication date
AU2633677A (en) 1979-01-04
IT1077241B (it) 1985-05-04
JPS534421A (en) 1978-01-17
DE2729652A1 (de) 1978-01-05

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Legal Events

Date Code Title Description
ST Notification of lapse