FR2009933A1 - Procede de reduction de la largeur de bande necessaire pour la transmission de signaux analogiques - Google Patents

Procede de reduction de la largeur de bande necessaire pour la transmission de signaux analogiques

Info

Publication number
FR2009933A1
FR2009933A1 FR6916220A FR6916220A FR2009933A1 FR 2009933 A1 FR2009933 A1 FR 2009933A1 FR 6916220 A FR6916220 A FR 6916220A FR 6916220 A FR6916220 A FR 6916220A FR 2009933 A1 FR2009933 A1 FR 2009933A1
Authority
FR
France
Prior art keywords
reducing
transmission
analogue signals
bandwidth necessary
bandwidth
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
FR6916220A
Other languages
English (en)
Other versions
FR2009933B1 (fr
Inventor
Albert Macovski
James R Woodbury
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.)
Southern Pacific Transportation Co
Original Assignee
Southern Pacific Transportation Co
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 Southern Pacific Transportation Co filed Critical Southern Pacific Transportation Co
Publication of FR2009933A1 publication Critical patent/FR2009933A1/fr
Application granted granted Critical
Publication of FR2009933B1 publication Critical patent/FR2009933B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/41—Bandwidth or redundancy reduction
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
    • H04N1/4135—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which a baseband signal showing more than two values or a continuously varying baseband signal is transmitted or recorded

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Dc Digital Transmission (AREA)
  • Editing Of Facsimile Originals (AREA)
FR6916220A 1968-05-22 1969-05-20 Procede de reduction de la largeur de bande necessaire pour la transmission de signaux analogiques Granted FR2009933A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US73116268A 1968-05-22 1968-05-22

Publications (2)

Publication Number Publication Date
FR2009933A1 true FR2009933A1 (fr) 1970-02-13
FR2009933B1 FR2009933B1 (fr) 1975-07-18

Family

ID=24938322

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6916220A Granted FR2009933A1 (fr) 1968-05-22 1969-05-20 Procede de reduction de la largeur de bande necessaire pour la transmission de signaux analogiques

Country Status (5)

Country Link
US (1) US3538246A (fr)
DE (1) DE1925978C2 (fr)
FR (1) FR2009933A1 (fr)
GB (1) GB1266232A (fr)
SE (1) SE362565B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125532A1 (fr) * 1971-02-16 1972-09-29 Graphic Sciences Inc
FR2415393A1 (fr) * 1978-01-24 1979-08-17 Electroniques Et Const Telecopieur a codage selectif par inversion de polarite

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1528084A (fr) * 1967-04-28 1968-06-07 Quenot & Cie Sarl Instrument de mesures linéaires à branches articulées à ressorts perfectionnés
US3928807A (en) * 1969-11-17 1975-12-23 Stephen F Weiss Homodyne FM receiver with folded signal and gated unfolding signal detection
US3847732A (en) * 1970-01-29 1974-11-12 Xerox Corp Semi-encoded facsimile transmission
US3750021A (en) * 1971-06-14 1973-07-31 Gte Automatic Electric Lab Inc Data transmission employing correlative nonbinary coding where the number of bits per digit is not an integer
US3795765A (en) * 1971-12-29 1974-03-05 Xerox Corp Alternate analog encoding method and apparatus
US3806639A (en) * 1972-05-16 1974-04-23 Xerox Corp Guard circuit and dwell time limiting method for three level analog encoders
US3962639A (en) * 1973-06-11 1976-06-08 The United States Of America As Represented By The Secretary Of The Navy System for reducing radio communication frequency bandwidth and increasing number of channels available
DE2720079C3 (de) * 1977-05-05 1981-11-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Verfahren zur Verbesserung der Bildqualität bei der Faksimile-Übertragung
JPS55138975A (en) * 1979-04-18 1980-10-30 Ricoh Co Ltd Color facsimile signal transmission system
US4249042A (en) * 1979-08-06 1981-02-03 Orban Associates, Inc. Multiband cross-coupled compressor with overshoot protection circuit
US4413347A (en) * 1980-02-25 1983-11-01 Nippon Electric Co., Ltd. Ternary to binary pulse regenerator for a regenerative repeater
US4446565A (en) * 1980-12-30 1984-05-01 Motorola, Inc. CVSD Transmission with improved intelligibility of voice signals
JPS59223073A (ja) * 1983-06-01 1984-12-14 Canon Inc 画像処理装置
GB2219906A (en) * 1988-06-15 1989-12-20 Sony Corp Image data transmitting systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2867685A (en) * 1952-02-18 1959-01-06 Minnesota Mining & Mfg Television recording and reproducing system
US2957947A (en) * 1957-02-20 1960-10-25 Bell Telephone Labor Inc Pulse code transmission system
US3403231A (en) * 1963-04-20 1968-09-24 Slaton Alvin Maynard Sequential head switching magnetic recording and reproducing system for high frequency signals
US3294896A (en) * 1963-07-24 1966-12-27 Bell Telephone Labor Inc Digital encoder for facsimile transmission
US3392233A (en) * 1964-09-18 1968-07-09 Rca Corp Magnetic recording of sampled frequency divided television signals
US3320536A (en) * 1964-10-20 1967-05-16 Storer Broadcasting Company Method and apparatus for signal modulation control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2125532A1 (fr) * 1971-02-16 1972-09-29 Graphic Sciences Inc
FR2415393A1 (fr) * 1978-01-24 1979-08-17 Electroniques Et Const Telecopieur a codage selectif par inversion de polarite

Also Published As

Publication number Publication date
GB1266232A (fr) 1972-03-08
FR2009933B1 (fr) 1975-07-18
DE1925978A1 (de) 1969-11-27
US3538246A (en) 1970-11-03
SE362565B (fr) 1973-12-10
DE1925978C2 (de) 1982-04-08

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse