WO1999016046A1 - Procede et circuit pour la production d'une image pouvant etre representee sur un ecran - Google Patents

Procede et circuit pour la production d'une image pouvant etre representee sur un ecran Download PDF

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Publication number
WO1999016046A1
WO1999016046A1 PCT/DE1998/002577 DE9802577W WO9916046A1 WO 1999016046 A1 WO1999016046 A1 WO 1999016046A1 DE 9802577 W DE9802577 W DE 9802577W WO 9916046 A1 WO9916046 A1 WO 9916046A1
Authority
WO
WIPO (PCT)
Prior art keywords
control characters
image
characters
window
window area
Prior art date
Application number
PCT/DE1998/002577
Other languages
German (de)
English (en)
Inventor
Wolfgang-Hermann Berthin
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1999016046A1 publication Critical patent/WO1999016046A1/fr

Links

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
    • G09G5/14—Display of multiple viewports
    • 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
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/222—Control of the character-code memory
    • 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
    • G09G5/22—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/30—Control of display attribute
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/422—Input-only peripherals, i.e. input devices connected to specially adapted client devices, e.g. global positioning system [GPS]
    • H04N21/42204—User interfaces specially adapted for controlling a client device through a remote control device; Remote control devices therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications

Definitions

  • the invention relates to a method and a circuit arrangement for generating an image composed of rows and columns, which can be displayed on a screen, from an image signal which contains image characters and control characters.
  • Such a method and such a circuit arrangement can be used in connection with the representation of characters and graphics on a screen, such as are known in teletext and displayable menus in television technology.
  • controller modules are being used more and more, which in addition to actually controlling the television, also carry out the decoding of the teletext data transmitted by the transmitter.
  • the teletext data are read into a memory and implemented by an algorithm so that they can be displayed as teletext pages on the television screen.
  • control characters are included in the teletext data.
  • attributes can be set with the control characters. These attributes include the color of a character, the background color or foreground color and special functions such as flashing a character or swapping the foreground color with the background color (inverse video).
  • the teletext data is transmitted in various stages according to the World Standard Teletext (WST).
  • WST World Standard Teletext
  • the decoder When transmitting level 1, the decoder must be able to process serial control characters in order to prepare a teletext page.
  • the serial control characters are stored in memory like the characters to be displayed. Should be within a character string, for example a word, change the attribute of a character to the next one, for example when changing from a red letter to a green letter, the character string must be interrupted by serial control characters which cause the corresponding attributes to be changed. This means that no character can be displayed on the screen that corresponds to the location of the serial control character. There is a gap with the background color that is currently set. The gap is greater the more attributes are to be changed when changing from one character to the next.
  • the controller modules with integrated teletext decoder are also used to display menus, so-called "on-screen displays" (OSD).
  • OSD on-screen displays
  • Such menus can be called up by the operator of a television set in order to set various parameters of the television set TV manufacturers have designed and programmed the requirements for the design options of the menus are significantly higher than for the teletext pages in order to create visually appealing menus.
  • the memory For each character there are additional storage locations in the memory for the control characters assigned to the attributes of the character. If the word width of the memory is eight bits at level 1, a multiple of it is to be provided at level 2.5. In particular, the higher chip area expenditure of the memory means higher costs.
  • the object of the invention is to provide a method for generating an image that can be displayed on a screen, which removes the restrictions mentioned when using serial control characters and can be carried out with a smaller amount of memory than is necessary when using parallel control characters.
  • a circuit arrangement with which the method according to the invention can be carried out is specified in claim 6.
  • the invention has the advantage that designs of teletext pages and overlays on the screen with serial control characters are possible in a way that was previously only possible with parallel control characters.
  • the memory requirement for serial control characters is clearly below that for parallel control characters.
  • the invention has the advantage that the activation signals and the means for activating individual registers make it easy to program a controller module that can be used with the invention.
  • Figure 1 is a schematic diagram of a circuit arrangement according to the invention
  • the method according to the invention provides that one
  • a window area is selected that is at most as large as the picture itself.
  • the window area is preferably rectangular and can be determined with coordinates for a corner point and a corner point diagonally opposite it. Certain parameters are selected uniformly within the window area. A certain area of the image is therefore combined into a window area with regard to these parameters.
  • image signals are stored in a display memory 1 and processed one after the other.
  • the image signals also contain control characters.
  • the pictorial characters can be characters according to the ASCII code or other graphic characters.
  • the attributes of the symbols or of the entire image are determined by the control characters.
  • An attribute is a parameter that defines the appearance of a symbol or an image. Such attributes are, for example, the color of a character, the background color or the foreground color.
  • the attributes also include various functions such as flashing the Image, contrast reduction, shadow or change of foreground and background color.
  • the display memory 1 can be constructed in the form of a matrix from rows and columns. Each storage location then corresponds to a smallest, separately controllable image unit of the image.
  • the display memory 1 can be designed, for example, as a matrix with 40 columns and 25 rows and can be read out in rows. The reading out of the display memory 1 is controlled by a column counter 2 and a row counter 3.
  • the image signals from the display memory 1 are fed to a decoder unit 4.
  • the picture characters are separated from the control characters.
  • control characters and image characters are fed to a display generator 5, which generates signals for generating an image on a screen.
  • image signals are read out from memory locations of the display memory 1 that lie within the area predetermined by the window area, some of the control characters contained in the image signals are replaced by window control characters.
  • the previously valid attributes are therefore replaced in the window area by attributes that are determined by the window control characters.
  • several attributes can be suddenly replaced by temporary attributes determined by window control characters.
  • the attributes that are not replaced by temporary attributes remain valid.
  • Amit D example it is possible to switch the window area of the image on a different background color, without the remaining attributes to influence.
  • the serial control characters are again supplied to the display generator 5 by the decoder unit 4.
  • the serial control characters cannot be used to change attributes within the window area.
  • attributes set by serial control characters also remain valid within the window area until they are changed by the window control characters by temporary attributes.
  • An identical area repeating itself at different points in the image can be created with the same window control characters by moving the window area.
  • a second option for replacing current serial control characters is that part of the current control characters is overwritten by window control characters only when entering or exiting the window area.
  • the serial control characters are therefore still fed to the display generator 5.
  • their content is overwritten by transition control characters at specified positions in the image, which are determined by the position of the window area.
  • the transition control characters are stored in a second register set 8.
  • Both the first and the second register set 7, 8 each consist of one or more registers.
  • the individual registers of the two register sets can be activated and deactivated by activation signals. Only the A ttribute derived from an activated register, act at the inlet and outlet or within a window region. If only one attribute is to be changed when entering the window area, the remaining attributes that are not to be changed within the window area do not necessarily have to have the same setting when using the activation signals for the registers as outside the window area. So not all registers have to be considered during programming. Rather, only the registers that are activated are relevant for changing attributes.
  • the programming effort and the memory requirement of a controller module used with the invention can be considerably reduced by using the activation signals.
  • Figure 1 shows the basic circuit diagram of a circuit arrangement according to the invention.
  • the column counter 2 and the row counter 3 are each connected to the display memory 1 and a comparison logic 9.
  • the image signals are stored in the display memory 1 in a matrix-like structure.
  • the column counter With each read process from the display memory 1, the column counter is increased by 1. At the end of the line, it is reset to zero and the line counter is incremented. When all lines have been processed, line counter 3 starts counting again from the first line.
  • the display memory 1 is connected to the decoder unit 4, so that the read image signals of the decoder unit 4 f ü h rbar are. This decoded from the image signals the STEU ⁇ er sign and the image mark. The symbols can be fed to the display generator 5 via a symbol line 11.
  • the display generator 5, which is connected to a screen 6, generates signals for controlling the screen 6 from the control and picture characters.
  • a control character line 12 connected to the decoder unit 4 is connected to the display generator 5 via a first changeover contact of a switch 13 .
  • a second changeover contact of the switch 13 is connected to the first register set 7.
  • the switch 13 is controlled by the comparison logic 9.
  • the second register set 8 is connected to the decoder unit 4 via a window logic 10.
  • the window logic 10 is controlled by the comparison logic 9.
  • the image signals are read out of the display memory 1 at the position corresponding to the counts of the column and row counters 2, 3 and fed to the decoder unit 4.
  • the comparison logic 9 compares the counts of the column and row counters 2, 3 with predetermined values which correspond to the coordinates of the window area. If there is a match, the switch 13 is activated such that a connection is made from the first register set 7 to the display generator 5. The control characters of the decoder unit 4 are then not taken into account within the window area.
  • the window logic 10 transfers start control characters from the second register set 8 to the decoder unit 4.
  • the start control characters only change the corresponding attributes when entering or leaving the window area.
  • the control characters of the decoder unit 4 act within the window area.
  • the use of window control characters and start S expensive sign next to each other is useful when the image on the screen to have a plurality of window regions.
  • either the switch 13 or the window logic 10 is activated.
  • the currently selected point should be displayed with an inverse video display in order to visually emphasize the selection. This can be achieved with window control characters simply by moving the window area to the selected point. Spaces to accommodate serial control characters are not necessary.
  • menus with teletext pages are also conceivable.
  • a menu set by window control characters from the first register set 7 can be displayed in a teletext page by switching over the display memory 1 without data of the teletext page being lost in the process. If the menu is hidden again, the teletext page is displayed in its original state.
  • the invention is also applicable to services similar to teletext, such as the closed caption text service in the USA.

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)

Abstract

L'invention concerne un procédé avec lequel il est possible d'obtenir une mise en forme souple de menus écran, même dans le contexte de pages de vidéotex, au moyen de caractères de commande sériels habituels. Cela est possible grâce à l'introduction de zones de fenêtre et de caractères de commande de fenêtre qui sont valables pour la zone de fenêtre dans son ensemble. Les caractères de commande de fenêtre sont mémorisés dans des registres sur lesquels le système commute à l'intérieur de la zone de fenêtre. L'invention concerne en outre un circuit avec lequel ledit procédé peut être mis en oeuvre. Cette invention trouve une application en particulier dans les appareils de télévision avec système d'affichage à l'écran.
PCT/DE1998/002577 1997-09-19 1998-09-02 Procede et circuit pour la production d'une image pouvant etre representee sur un ecran WO1999016046A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19741472 1997-09-19
DE19741472.9 1997-09-19

Publications (1)

Publication Number Publication Date
WO1999016046A1 true WO1999016046A1 (fr) 1999-04-01

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ID=7843007

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1998/002577 WO1999016046A1 (fr) 1997-09-19 1998-09-02 Procede et circuit pour la production d'une image pouvant etre representee sur un ecran

Country Status (1)

Country Link
WO (1) WO1999016046A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185294A2 (fr) * 1984-12-20 1986-06-25 International Business Machines Corporation Dispositif d'affichage
EP0258825A2 (fr) * 1986-08-27 1988-03-09 Nec Corporation Dispositif de contrôle d'affichage avec fonction d'attribut améliorée
EP0281008A2 (fr) * 1987-03-05 1988-09-07 International Business Machines Corporation Appareil d'affichage de données numériques

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0185294A2 (fr) * 1984-12-20 1986-06-25 International Business Machines Corporation Dispositif d'affichage
EP0258825A2 (fr) * 1986-08-27 1988-03-09 Nec Corporation Dispositif de contrôle d'affichage avec fonction d'attribut améliorée
EP0281008A2 (fr) * 1987-03-05 1988-09-07 International Business Machines Corporation Appareil d'affichage de données numériques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ANONYMOUS: "Highlighting Image Data on Pel for Pel Addressable Displays. November 1980.", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 23, no. 6, November 1980 (1980-11-01), New York, US, pages 2342 - 2343, XP002094435 *

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