DE2732188A1 - System zur automatischen korrektur des formfaktors - Google Patents

System zur automatischen korrektur des formfaktors

Info

Publication number
DE2732188A1
DE2732188A1 DE19772732188 DE2732188A DE2732188A1 DE 2732188 A1 DE2732188 A1 DE 2732188A1 DE 19772732188 DE19772732188 DE 19772732188 DE 2732188 A DE2732188 A DE 2732188A DE 2732188 A1 DE2732188 A1 DE 2732188A1
Authority
DE
Germany
Prior art keywords
square wave
input
form factor
generated
reading
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Withdrawn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
DE19772732188
Other languages
German (de)
English (en)
Inventor
Claude Bricot
Francois Le Carvennec
Jean Pierre Lacotte
Jean Claude Lehureau
Pierre Oprandi
Jean Paul Peltier
Claude Puech
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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 Thomson-Brandt SA filed Critical Thomson-Brandt SA
Publication of DE2732188A1 publication Critical patent/DE2732188A1/de
Withdrawn legal-status Critical Current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
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/931—Regeneration of the television signal or of selected parts thereof for restoring the level of the reproduced signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • 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
    • G11B7/005—Reproducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/93—Regeneration of the television signal or of selected parts thereof
    • H04N5/94—Signal drop-out compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Television Signal Processing For Recording (AREA)
DE19772732188 1976-07-16 1977-07-15 System zur automatischen korrektur des formfaktors Withdrawn DE2732188A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7621819A FR2358797A1 (fr) 1976-07-16 1976-07-16 Systeme de correction automatique du facteur de forme de l'onde porteuse issue de la lecture d'un support d'information

Publications (1)

Publication Number Publication Date
DE2732188A1 true DE2732188A1 (de) 1978-02-09

Family

ID=9175819

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19772732188 Withdrawn DE2732188A1 (de) 1976-07-16 1977-07-15 System zur automatischen korrektur des formfaktors

Country Status (7)

Country Link
US (1) US4142208A (cg-RX-API-DMAC7.html)
JP (1) JPS5337319A (cg-RX-API-DMAC7.html)
CA (1) CA1106493A (cg-RX-API-DMAC7.html)
DE (1) DE2732188A1 (cg-RX-API-DMAC7.html)
FR (1) FR2358797A1 (cg-RX-API-DMAC7.html)
GB (1) GB1590801A (cg-RX-API-DMAC7.html)
NL (1) NL7707852A (cg-RX-API-DMAC7.html)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0048041A3 (en) * 1978-03-27 1982-08-04 Discovision Associates Method and apparatus for writing a signal-information track by using a radiation beam
US4312013A (en) * 1979-09-19 1982-01-19 Rca Corporation Non-linear aperture correction circuit
NL8105095A (nl) * 1981-11-11 1983-06-01 Philips Nv Schakeling voor het omzetten van een informatiesignaal in een rechthoekvormig signaal.
JPS58190190A (ja) * 1982-04-30 1983-11-07 Victor Co Of Japan Ltd 周波数変調波信号の二次歪低減装置
US4549288A (en) * 1982-12-20 1985-10-22 North American Philips Corporation Apparatus for enhancing the playback signal in an optical data recording system
DE3612266C1 (de) * 1986-04-11 1987-06-19 Philips Patentverwaltung Schaltungsanordnung fuer frequenzmodulierte Bildsignale
JPH083942B2 (ja) * 1986-11-20 1996-01-17 株式会社リコー 情報記録再生装置
US5070495A (en) * 1989-04-12 1991-12-03 International Business Machines Corporation Write calibration for magnetooptic disk recorders
US5185733A (en) * 1990-03-01 1993-02-09 International Business Machines Corporation Calibrating lasers for optical recording using a maximal readback signal amplitude as a criterion
JPH04212723A (ja) * 1990-07-31 1992-08-04 Toshiba Corp 情報記録再生装置
JP2550772B2 (ja) * 1990-10-26 1996-11-06 日本ビクター株式会社 光学的情報記録媒体円盤の再生装置
US5204848A (en) * 1991-06-17 1993-04-20 International Business Machines Corporation Adjusting amplitude detection threshold by feeding back timing-data phase errors
US5268893A (en) * 1991-10-18 1993-12-07 International Business Machines Corporation Write power calibration utilizing least squares fit of read-back signals for moving media memory
EP0686298B1 (fr) * 1993-12-23 2000-05-17 Thomson-Csf Procede et systeme optiques d'inscription/lecture d'information sur un support d'enregistrement
FR2723243B1 (fr) * 1994-07-26 1996-09-06 Thomson Csf Dispositif d'enregistrement et/ou de lecture de tetes magnetiques et son procede de realisation
FR2731808B1 (fr) * 1995-03-14 1997-04-11 Thomson Csf Systeme de reglage de focalisation optique
FR2739965B1 (fr) * 1995-10-17 1997-11-07 Thomson Csf Dispositif emetteur-recepteur de lumiere et systeme de lecture optique
FR2786345B1 (fr) 1998-11-24 2001-02-09 Thomson Csf Dispositif de cryptage quantique
FR2787232B1 (fr) 1998-12-15 2001-02-23 Thomson Csf Disque d'enregistrement optique anti-piratage et procede de lecture d'un tel disque
FR2805071B1 (fr) 2000-02-11 2002-05-03 Moulage Plastique De L Ouest Disque optique protege contre la copie et procede de protection pour un tel disque
US7149173B2 (en) * 2000-10-17 2006-12-12 Thales Medium for recording optically readable data, method for making same and optical system reproducing said data
FR2824905B1 (fr) * 2001-05-15 2003-08-29 Thomson Csf Gyrometre a fibre optique

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB756444A (en) 1953-09-02 1956-09-05 Saunder Roe Ltd Improvements relating to electric circuits for producing rectangular waveforms
US3909608A (en) * 1972-12-26 1975-09-30 Thomson Csf Reproducing device for the optical reading out of a record carrying an embossed print
FR2266932B1 (cg-RX-API-DMAC7.html) * 1973-03-02 1977-09-02 Thomson Brandt
NL7402078A (nl) * 1974-02-15 1975-08-19 Philips Nv Inrichting voor het uitlezen van een schijfvormige registratiedrager.
US3988531A (en) * 1975-04-02 1976-10-26 Zenith Radio Corporation System for compensating for incorrect duty factor when reading out information stored in a video disc
US3988532A (en) * 1975-04-02 1976-10-26 Zenith Radio Corporation Arrangement for compensating duty factor variations in an optical video disc

Also Published As

Publication number Publication date
NL7707852A (nl) 1978-01-18
US4142208A (en) 1979-02-27
FR2358797B1 (cg-RX-API-DMAC7.html) 1982-01-22
GB1590801A (en) 1981-06-10
JPS5337319A (en) 1978-04-06
CA1106493A (en) 1981-08-04
FR2358797A1 (fr) 1978-02-10

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Legal Events

Date Code Title Description
8141 Disposal/no request for examination