FR2420890A2 - Recepteur de television equipe pour recevoir simultanement plusieurs programmes - Google Patents

Recepteur de television equipe pour recevoir simultanement plusieurs programmes

Info

Publication number
FR2420890A2
FR2420890A2 FR7907118A FR7907118A FR2420890A2 FR 2420890 A2 FR2420890 A2 FR 2420890A2 FR 7907118 A FR7907118 A FR 7907118A FR 7907118 A FR7907118 A FR 7907118A FR 2420890 A2 FR2420890 A2 FR 2420890A2
Authority
FR
France
Prior art keywords
program
television receiver
circuit
sound
receive multiple
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
FR7907118A
Other languages
English (en)
Other versions
FR2420890B2 (fr
Inventor
Edmund Zaehringer
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
ITT Industries Inc
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 Deutsche ITT Industries GmbH, ITT Industries Inc filed Critical Deutsche ITT Industries GmbH
Publication of FR2420890A2 publication Critical patent/FR2420890A2/fr
Application granted granted Critical
Publication of FR2420890B2 publication Critical patent/FR2420890B2/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Television Receiver Circuits (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

Récepteur de télévision comportant un commutateur de fréquence d'accord et une mémoire analogique pour produire une image à échelle réduite d'un programme supplémentaire dans l'image du programme en cours. Le signal de son du programme principal étant périodiquement interrompu pendant que le circuit d'accord unique est réglé sur le second programme, il y a lieu de prévoir un circuit de compensation et de régénération de ce signal. Selon l'invention, la porteuse son NF traverse un circuit d'échantillonnage et de maintien 14 dont la fréquence d'échantillonnage H est un multiple h de la fréquence de commutation f u et dont le temps de maintien est au moins égal au temps total de perturbation du son. Un filtre passe-bas 15 limite la bande passante à la moitié de la fréquence d'échantillonnage.
FR7907118A 1978-03-22 1979-03-21 Recepteur de television equipe pour recevoir simultanement plusieurs programmes Granted FR2420890A2 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782812549 DE2812549A1 (de) 1978-03-22 1978-03-22 Fernsehempfaenger mit einer einrichtung zur gleichzeitigen wiedergabe mehrerer programme

Publications (2)

Publication Number Publication Date
FR2420890A2 true FR2420890A2 (fr) 1979-10-19
FR2420890B2 FR2420890B2 (fr) 1982-10-22

Family

ID=6035197

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7907118A Granted FR2420890A2 (fr) 1978-03-22 1979-03-21 Recepteur de television equipe pour recevoir simultanement plusieurs programmes

Country Status (5)

Country Link
JP (1) JPS54130831A (fr)
DE (1) DE2812549A1 (fr)
FR (1) FR2420890A2 (fr)
GB (1) GB2017452B (fr)
IT (1) IT1207181B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01246978A (ja) * 1988-03-28 1989-10-02 Toshiba Corp 画像情報受信表示装置
ES2057046T3 (es) * 1989-10-06 1994-10-16 Siemens Ag Disposicion de circuito para mezclar imagen-en-imagen en un aparato de television con un solo sintonizador.
GB0127234D0 (en) 2001-11-13 2002-01-02 British Sky Broadcasting Ltd Improvements in receivers for television signals

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2239593B2 (de) * 1972-08-11 1975-02-27 Pelweckyj, Peter, 6056 Heusenstamm Verfahren und anordnung zur elektronischen einblendung mehrerer markierungen oder bilder in ein videosignal
DE2542502A1 (de) * 1975-09-24 1977-04-07 Itt Ind Gmbh Deutsche Fernsehempfaenger mit einer einrichtung zur gleichzeitigen wiedergabe mehrerer programme

Also Published As

Publication number Publication date
DE2812549A1 (de) 1979-09-27
GB2017452A (en) 1979-10-03
FR2420890B2 (fr) 1982-10-22
IT7921170A0 (it) 1979-03-21
IT1207181B (it) 1989-05-17
DE2812549C2 (fr) 1987-03-26
GB2017452B (en) 1982-06-30
JPS54130831A (en) 1979-10-11

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