GB1326466A - Scan conversion arrangements - Google Patents

Scan conversion arrangements

Info

Publication number
GB1326466A
GB1326466A GB1326466DA GB1326466A GB 1326466 A GB1326466 A GB 1326466A GB 1326466D A GB1326466D A GB 1326466DA GB 1326466 A GB1326466 A GB 1326466A
Authority
GB
United Kingdom
Prior art keywords
display
line
raster
scan
read
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
Application number
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.)
Allard Way Holdings Ltd
Original Assignee
Elliott Brothers London Ltd
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 Elliott Brothers London Ltd filed Critical Elliott Brothers London Ltd
Publication of GB1326466A publication Critical patent/GB1326466A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0105—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level using a storage device with different write and read speed
    • H04N7/0107—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level using a storage device with different write and read speed using beam gun storage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/295—Means for transforming co-ordinates or for evaluating data, e.g. using computers
    • G01S7/298—Scan converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/01—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level
    • H04N7/0105—Conversion of standards, e.g. involving analogue television standards or digital television standards processed at pixel level using a storage device with different write and read speed

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

1326466 Scan conversion; radar display ELLIOTT BROS (LONDON) Ltd 23 June 1972 [20 July 1971] 34019/71 Headings H4D and H4F A radar display is described using a technique for scan conversion of the radial sweep PPI radar signals to a raster display, similar to that disclosed in Specification 1,315,624, storage tubes used being of the type in which a stored signal is erased upon readout to an extent dependent upon the reading beam current, the current being therefore varied to control the persistence of the display. In the shown embodiment for displaying an original P.P.I. display in a raster scan (18), the radar video returns at 4 are alternately applied line by line to silicon storage vidicons 1, 2. The scanning outputs from P.P.I, time base 12 and raster time base 11 are alternately applied at line (12) rate via switches 10 and 14 so that the writing-in is with a P.P.I. radial scan for both vidicons and the reading-out is always with a raster scan. Each vidicon is switched from write to read format by the energization of a transistor 20 or 21 so that the potential on the target drops from 150V, i.e. the write format voltage, to between 8 and 20V. The latter or read format voltage determines the persistence of the final display and is varied by resistor 24. After one radial line has been written into vidicon 1, switches 3, 10, 14, 17 change over so that the line is read out by raster scan and the result fed to raster scanned display tube 18. The next radial line has mean-while been written into vidicon 2 for subsequent raster scan read-out. Fig. 2 gives a summary of the operation.
GB1326466D 1972-06-23 1972-06-23 Scan conversion arrangements Expired GB1326466A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3401971 1972-06-23

Publications (1)

Publication Number Publication Date
GB1326466A true GB1326466A (en) 1973-08-15

Family

ID=10360364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1326466D Expired GB1326466A (en) 1972-06-23 1972-06-23 Scan conversion arrangements

Country Status (1)

Country Link
GB (1) GB1326466A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149252A (en) * 1977-05-20 1979-04-10 The Bendix Corporation Digital ρ-θ to XY scan converter for use with limited access or random access reiteration memory

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149252A (en) * 1977-05-20 1979-04-10 The Bendix Corporation Digital ρ-θ to XY scan converter for use with limited access or random access reiteration memory

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee