EP0276800B1 - Einrichtung zur Darstellung eines zusammengesetzten Bildes - Google Patents

Einrichtung zur Darstellung eines zusammengesetzten Bildes Download PDF

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Publication number
EP0276800B1
EP0276800B1 EP88101043A EP88101043A EP0276800B1 EP 0276800 B1 EP0276800 B1 EP 0276800B1 EP 88101043 A EP88101043 A EP 88101043A EP 88101043 A EP88101043 A EP 88101043A EP 0276800 B1 EP0276800 B1 EP 0276800B1
Authority
EP
European Patent Office
Prior art keywords
image
screen
sources
control
composite
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
EP88101043A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0276800A3 (en
EP0276800A2 (de
Inventor
Ludwig Dr. Ing. Pietzsch
Detlef Dr. Ing. Senger
Horst Dipl.-Inf. Winter
Hubert Dipl.-Inf. Völlinger
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.)
IBP Pietzsch GmbH
Original Assignee
IBP Pietzsch GmbH
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 IBP Pietzsch GmbH filed Critical IBP Pietzsch GmbH
Publication of EP0276800A2 publication Critical patent/EP0276800A2/de
Publication of EP0276800A3 publication Critical patent/EP0276800A3/de
Application granted granted Critical
Publication of EP0276800B1 publication Critical patent/EP0276800B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/36—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of a graphic pattern, e.g. using an all-points-addressable [APA] memory
    • G09G5/39—Control of the bit-mapped memory
    • G09G5/395—Arrangements specially adapted for transferring the contents of the bit-mapped memory to the screen

Definitions

  • the invention relates to a device for displaying an overall digital image on a screen of a screen device, which is composed of several natural moving and / or synthetic partial images supplied by different sources.
  • the display of an image on the screen of a display device is represented by a large number of lines, e.g. 625, which are traversed by an electron beam.
  • lines e.g. 625
  • the entire process is repeated. So that the electron beam travels the lines regularly, it must be synchronized in the horizontal and vertical directions.
  • the clock for the horizontal synchronization the line clock, the electron beam is clocked from one line to the next line, while it returns with the clock for the vertical synchronization, the image clock, back to the beginning of the picture and moves the screen again line by line.
  • This well-known principle can be used to display color or gray values at defined points on the screen that are not from the connected image source, e.g. TV cameras.
  • Methods for superimposing graphic elements in the image of a screen device are already known (DE-A-34 10 662).
  • Techniques such as "picture in picture” in analog studio technology or window techniques in screen-supported computer workstations which work with purely synthetic raster images (DE-B-30 35 636) are also known.
  • the invention has for its object to provide a method and a device of the type mentioned that enable an improved overall representation of at least two partial images generated by different sources on a screen.
  • the device according to the invention makes it possible to display images, in particular on high-resolution screens, which keep pace from pixel to pixel, from line to line and from image to image with the pixel frequency of a few 10 MHz can be composed of changing partial images from different sources, the image sources being able to work asynchronously and with different image generation frequencies.
  • three TV cameras 1, raster graphics generators 2 and mass memories 3 for digital image data are provided for generating images as "sources", each of which has its own buffer memories 11 to 13, 14 to 16 and 17 to 19 assigned.
  • the TV cameras 1, raster graphics generators 2 and mass storage 3 transmit their information asynchronously and thus independently of one another in each case to a buffer memory 11 to 19 which can be written to or read via various inputs and outputs (“dual port”). While the writing can take place at different data rates, the reading and transfer of the data to an interface circuit 25 for a screen or monitor 30 on which the image information is to be displayed is synchronized via a central clock control 20.
  • the clock rate must at least correspond to the video frequency. In the case of high-resolution screens, it must even be a multiple of the video frequency in order to produce a flicker-free picture.
  • the buffer memory 11 to 19, which is normally Images or partial images are not read out one after the other or according to another fixed scheme and are displayed on the monitor 30, but the monitor image can basically be composed point by point from points from different sources 1 and / or 2 and / or 3.
  • a mask memory 21, which can be loaded from a control computer 24, is provided, the content of which is transferred to a control network 23 at the pixel frequency.
  • the control network 23 connects one bit of the mask memory output register 22 to the control part 31 to 39 of the buffer memory 11 to 19 of a source 1, 2, 3.
  • the mask memory 21 is constructed in such a way that the data width (data word) that can be read out in parallel corresponds exactly to the number of sources, and if the mask memory 21 is loaded such that one bit is set for each data word, a selection of the pixel to be displayed can be made from pixel to pixel from the pixels of all available sources 1, 2, 3.
  • control of the buffer memory is additionally provided with four loadable registers or counters 40, then partial images of various formats can be used as the source and inserted at any point in the overall image, since the starting point of the partial image (top left corner) can be preset by suitably setting the counter 40. can be determined relative to the overall picture.
  • One counter indicates the line offset, the second the pixel shift in the line and the further counters run along to the end of the line or to the last line of the field.
  • the counters 40 are preset according to the picture size and the desired picture position in the overall picture via the data collecting lines (bus) 41.
  • the control information specified by the mask memory 21 finally causes in the control of the buffer memory 11 to 19 that the gray value or color value of the pixel to be displayed is passed on from the selected source via the data collection line 42 to the interface circuit 25.
  • the gray values or colors are transmitted to the interface circuit 25 pixel by pixel as they are continuously required for the display. Regarding the arrangement, it does not matter what size the overall picture has in relation to the size of the drawing files and how the drawing files or parts of the drawing files are put together.
  • text can be faded in at any point on the screen, either "into space” or via already defined drawing files.
  • a "panorama image” can be displayed on the screen by combining the partial images obtained.
  • a corresponding map section can be shown in the overall display, in which the viewing direction of the television camera as an arrow or Like. is representable. The camera can be swiveled in this direction by marking a desired direction on the map section shown using a light pen, by touching or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Studio Circuits (AREA)
EP88101043A 1987-01-26 1988-01-25 Einrichtung zur Darstellung eines zusammengesetzten Bildes Expired - Lifetime EP0276800B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873702220 DE3702220A1 (de) 1987-01-26 1987-01-26 Verfahren und einrichtung zur darstellung eines gesamtbildes auf einem bildschirm eines bildschirmgeraetes
DE3702220 1987-01-26

Publications (3)

Publication Number Publication Date
EP0276800A2 EP0276800A2 (de) 1988-08-03
EP0276800A3 EP0276800A3 (en) 1990-03-28
EP0276800B1 true EP0276800B1 (de) 1994-06-08

Family

ID=6319556

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101043A Expired - Lifetime EP0276800B1 (de) 1987-01-26 1988-01-25 Einrichtung zur Darstellung eines zusammengesetzten Bildes

Country Status (3)

Country Link
US (1) US4876600A (enrdf_load_stackoverflow)
EP (1) EP0276800B1 (enrdf_load_stackoverflow)
DE (2) DE3702220A1 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
EP0276800A3 (en) 1990-03-28
DE3889934D1 (de) 1994-07-14
US4876600A (en) 1989-10-24
DE3702220A1 (de) 1988-08-04
EP0276800A2 (de) 1988-08-03
DE3702220C2 (enrdf_load_stackoverflow) 1992-08-13
HK1002718A1 (en) 1998-09-11

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