US1757480A - Fading elimination in radio picture-transmission systems - Google Patents

Fading elimination in radio picture-transmission systems Download PDF

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Publication number
US1757480A
US1757480A US286617A US28661728A US1757480A US 1757480 A US1757480 A US 1757480A US 286617 A US286617 A US 286617A US 28661728 A US28661728 A US 28661728A US 1757480 A US1757480 A US 1757480A
Authority
US
United States
Prior art keywords
picture
lines
fading
exploring
transmission
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.)
Expired - Lifetime
Application number
US286617A
Other languages
English (en)
Inventor
Schroter Fritz
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.)
Telefunken AG
Original Assignee
Telefunken AG
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 Telefunken AG filed Critical Telefunken AG
Application granted granted Critical
Publication of US1757480A publication Critical patent/US1757480A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • H04N3/34—Elemental scanning area oscillated rapidly in direction transverse to main scanning direction
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface
    • H04N1/0664—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface with sub-scanning by translational movement of the picture-bearing surface
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional [1D] array
    • H04N1/1911—Simultaneously or substantially simultaneously scanning picture elements on more than one main scanning line, e.g. scanning in swaths
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/203—Simultaneous scanning of two or more separate pictures, e.g. two sides of the same sheet
    • 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
    • H04N1/44—Secrecy systems
    • H04N1/448—Rendering the image unintelligible, e.g. scrambling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/30—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical otherwise than with constant velocity or otherwise than in pattern formed by unidirectional, straight, substantially horizontal or vertical lines
    • 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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/06—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using cylindrical picture-bearing surfaces, i.e. scanning a main-scanning line substantially perpendicular to the axis and lying in a curved cylindrical surface

Definitions

  • the diminution or fading of the electromagnetic waves continue for an appreciably longer time than for a single line so that in the usual exploring or reassembling methods in which the constituent or vertical picture lines are successively transmitted, the disturbance will manifest itself in several adjacent lines.
  • I transmission of the picture is effected in such a way that exploration of the picture at the sending end and consequently the reassemloling thereof at the receiving end, is not effected by the form of closely adjacent and successive lines, but the transmission and reception is accomplished in such a way that first a few lines being at a relatively great distance from each other in the picture are consecutively transmitted, and by'that next a few lines an equal distance apart are transmitted, but so that the relative position of the picture and the exploring element is shifted a distance equal to thewidth of an exploring line compared with the preceding position. Hence, after this second exploration, pairs of adjacent lines] being a relatively great distance apart are transmitted.
  • the position between picture and exploring means is again shifted so that in each case three lines come to be placed contiguous to one another, and so on, until the whole picture has been explored.
  • the exploring means may be of a kind so that several perforation lines are provided which explore the picture consecutively at relatively great distances, and that next, after the first exploring stage of the picture, the picture strip 1s shifted by convenient drive means by the width of an exploring line.
  • the reassemblmg means at the receiving end should be conreproduced picture lines both as to space and time, must be worked or effected in the same manner so as to suit the operation of the device at the sending end.
  • the method of transmitting and receiving pictures by radio which includes exploring and reassembling a picture along a number of lines separated one'from the other a dis-, tance amounting to several times the width of a single exploring line, exploring and reassembling the picture along lines adjacent said first named set of lines at widely interrupted time intervals from said first exploration and reassembling, and continuing the exploring and reassembling of adjacent lines until the entire space between the first named separated lines of exploration and reassemblage has been explored and reassembled by separating each successive adjacent exploration and reassemblage by time FRITZ SCI-IRGTER.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimiles In General (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
US286617A 1927-05-21 1928-06-19 Fading elimination in radio picture-transmission systems Expired - Lifetime US1757480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DET33541D DE484765C (de) 1927-05-21 1927-05-21 Verfahren zur Bildzerlegung bzw. Zusammensetzung

Publications (1)

Publication Number Publication Date
US1757480A true US1757480A (en) 1930-05-06

Family

ID=7557848

Family Applications (1)

Application Number Title Priority Date Filing Date
US286617A Expired - Lifetime US1757480A (en) 1927-05-21 1928-06-19 Fading elimination in radio picture-transmission systems

Country Status (4)

Country Link
US (1) US1757480A (fr)
DE (1) DE484765C (fr)
FR (1) FR654018A (fr)
GB (1) GB290973A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE944557C (de) * 1932-07-19 1956-06-21 Rca Corp Tonfilmfernuebertragungssystem mit Lochscheibenabtastung und Wiedergabe durch Braun'sche Roehre

Also Published As

Publication number Publication date
GB290973A (en) 1929-05-09
DE484765C (de) 1930-05-26
FR654018A (fr) 1929-03-29

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