FR2440134A1 - Procede et dispositif d'enregistrement et de reproduction d'un signal video - Google Patents

Procede et dispositif d'enregistrement et de reproduction d'un signal video

Info

Publication number
FR2440134A1
FR2440134A1 FR7830094A FR7830094A FR2440134A1 FR 2440134 A1 FR2440134 A1 FR 2440134A1 FR 7830094 A FR7830094 A FR 7830094A FR 7830094 A FR7830094 A FR 7830094A FR 2440134 A1 FR2440134 A1 FR 2440134A1
Authority
FR
France
Prior art keywords
track
video
stored
information
playback system
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
FR7830094A
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.)
Discovision Associates
Original Assignee
MCA Discovision 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
Priority to BE191172A priority Critical patent/BE871326A/fr
Application filed by MCA Discovision Inc filed Critical MCA Discovision Inc
Priority to FR7830094A priority patent/FR2440134A1/fr
Publication of FR2440134A1 publication Critical patent/FR2440134A1/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/7605—Television signal recording on discs or drums
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1263—Power control during transducing, e.g. by monitoring
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/128—Modulators

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

L'INVENTION CONCERNE L'ENREGISTREMENT D'UN SIGNAL VIDEO SUR DISQUE. POUR ENREGISTRER UN SIGNAL VIDEO SUR UN DISQUE 10, ON MODULE UNE PORTEUSE EN FREQUENCE A L'AIDE DU SIGNAL VIDEO, ET ON FORME SUR LE DISQUE DES MARQUES 37 QUI CORRESPONDENT PAR EXEMPLE AUX DEMI-CYCLES POSITIFS DU SIGNAL MODULE. ON FORME LES MARQUES 37 A L'AIDE D'UN FAISCEAU LASER D'ECRITURE, ET ON UTILISE LA DIFFERENCE ENTRE LES PROPRIETES REFLECHISSANTES DE CES MARQUES, ET CELLES DES REGIONS INTERMEDIAIRES 38, POUR LIRE L'INFORMATION ENREGISTREE, A L'AIDE D'UN FAISCEAU LASER DE LECTURE. APPLICATION A L'ENREGISTREMENT D'EMISSIONS DE TELEVISION.
FR7830094A 1978-10-23 1978-10-23 Procede et dispositif d'enregistrement et de reproduction d'un signal video Pending FR2440134A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE191172A BE871326A (fr) 1978-10-23 1978-10-17 Procede et dispositif d'enregistrement et de reproduction d'un signal video.
FR7830094A FR2440134A1 (fr) 1978-10-23 1978-10-23 Procede et dispositif d'enregistrement et de reproduction d'un signal video

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7830094A FR2440134A1 (fr) 1978-10-23 1978-10-23 Procede et dispositif d'enregistrement et de reproduction d'un signal video

Publications (1)

Publication Number Publication Date
FR2440134A1 true FR2440134A1 (fr) 1980-05-23

Family

ID=9214050

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7830094A Pending FR2440134A1 (fr) 1978-10-23 1978-10-23 Procede et dispositif d'enregistrement et de reproduction d'un signal video

Country Status (2)

Country Link
BE (1) BE871326A (fr)
FR (1) FR2440134A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447890A1 (fr) * 2003-02-12 2004-08-18 Northrop Grumman Corporation Miroir pour cavité laser à réflection variable

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044122A3 (en) * 1978-03-27 1982-08-04 Discovision Associates Method and apparatus for writing a signal information track on a disc
BE871326A (fr) * 1978-10-23 1979-04-17 Mca Disco Vision Procede et dispositif d'enregistrement et de reproduction d'un signal video.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128576A1 (fr) * 1971-03-04 1972-10-20 Philips Nv
FR2218612A1 (fr) * 1973-02-20 1974-09-13 Mca Disco Vision
DE2521695A1 (de) * 1974-05-15 1976-02-05 Canon Kk Signalaufzeichnungsvorrichtung
FR2385170A1 (fr) * 1977-03-24 1978-10-20 Laser File Procede et appareil d'enregistrement d'informations
BE871326A (fr) * 1978-10-23 1979-04-17 Mca Disco Vision Procede et dispositif d'enregistrement et de reproduction d'un signal video.
EP0005316A1 (fr) * 1978-03-27 1979-11-14 Discovision Associates Appareil optique et procédé d'enregistrement d'information et support d'enregistrement formé par cet appareil; appareil optique pour recouvrer l'information enregistrée

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128576A1 (fr) * 1971-03-04 1972-10-20 Philips Nv
FR2218612A1 (fr) * 1973-02-20 1974-09-13 Mca Disco Vision
FR2399086A1 (fr) * 1973-02-20 1979-02-23 Mca Disco Vision Appareil et procede pour emmagasiner des informations sous la forme d'un signal module en frequence sur un element de stockage d'informations
FR2399087A1 (fr) * 1973-02-20 1979-02-23 Mca Disco Vision Appareil et procede pour emmagasiner et restituer des informations sous la forme d'un signal module en frequence sur un element de stockage d'information
DE2521695A1 (de) * 1974-05-15 1976-02-05 Canon Kk Signalaufzeichnungsvorrichtung
FR2385170A1 (fr) * 1977-03-24 1978-10-20 Laser File Procede et appareil d'enregistrement d'informations
EP0005316A1 (fr) * 1978-03-27 1979-11-14 Discovision Associates Appareil optique et procédé d'enregistrement d'information et support d'enregistrement formé par cet appareil; appareil optique pour recouvrer l'information enregistrée
EP0044122A2 (fr) * 1978-03-27 1982-01-20 Discovision Associates Méthode et appareil pour écrire une piste de signal d'information sur un disque
EP0045117A2 (fr) * 1978-03-27 1982-02-03 Discovision Associates Appareil et méthode pour écrire une piste d'information sur un disque
BE871326A (fr) * 1978-10-23 1979-04-17 Mca Disco Vision Procede et dispositif d'enregistrement et de reproduction d'un signal video.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1447890A1 (fr) * 2003-02-12 2004-08-18 Northrop Grumman Corporation Miroir pour cavité laser à réflection variable
US7173956B2 (en) 2003-02-12 2007-02-06 Northrop Grumman Corporation Electrically controlled uniform or graded reflectivity electro-optic mirror

Also Published As

Publication number Publication date
BE871326A (fr) 1979-04-17

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Legal Events

Date Code Title Description
CD Change of name or company name
TP Transmission of property