EP1100068A2 - Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display - Google Patents
Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display Download PDFInfo
- Publication number
- EP1100068A2 EP1100068A2 EP00123963A EP00123963A EP1100068A2 EP 1100068 A2 EP1100068 A2 EP 1100068A2 EP 00123963 A EP00123963 A EP 00123963A EP 00123963 A EP00123963 A EP 00123963A EP 1100068 A2 EP1100068 A2 EP 1100068A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- image
- display
- picture
- der
- 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
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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
- G09G5/003—Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto
- G09G5/006—Details of the interface to the display terminal
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/04—Changes in size, position or resolution of an image
- G09G2340/0407—Resolution change, inclusive of the use of different resolutions for different screen areas
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
Definitions
- the invention relates to a device for improving the image display a display.
- a display with a further, higher resolution can in the simplest case increases the number of pixels in both the horizontal and vertical directions, for example, doubled.
- an interpolation of the image signal can take place for this purpose.
- a disadvantage of such an interpolation is that when hard Transitions or when there are steep signal edges in the image signal of the low resolution generated by the interpolation process intermediate stages be blurred in the reproduced image in the form of blurred Edges are visible.
- DE-A-197 14 906 describes a method for improving the image resolution Color rendering devices known.
- People exists with these devices conventional elementary color point from several to one unit formatted color pixels. From the color pixels of the conventional elementary Color dots are temporarily formed new additional color dots whose Color centers lie outside the color centers of the conventional color dots.
- the images are made up of conventional color dots and these Images derived from images from additional color dots in quick succession excited one after the other.
- the object of the invention Reason to show a device that the image representation on a Improved display of higher resolution, if there is more input Low resolution image signals.
- the advantages of the invention are, in particular, that depending one of the current image content and the history of the image A decision is made as to whether a transition occurs Interpolation process carried out and thus in the image with higher resolution smooth transition is created or whether in the image with higher resolution a hard transition occurs.
- This procedure also allows in the picture higher resolution to take account of the image content and natural Make transitions smooth and hard transitions, for example in the picture side lines of a tennis court running diagonally from top to bottom, hard to represent, i.e. do not perform interpolation.
- Including the history of the image can affect the quality of the image display can be significantly improved on the display.
- FIG. 1 shows a block diagram of a device according to the invention.
- This image signal is fed to an interpolator 2 arranged in a first signal path and to a delay circuit 3 arranged in a second signal path arranged parallel to the first.
- An image signal with a second resolution, which is higher than the first resolution, is available at the output of the interpolator 2 and at the output of the delay circuit 3.
- the output signal of the interpolator 2 is fed to a terminal a of a switch 6.
- the output signal of the delay circuit 3 is forwarded to the terminal b of the switch 6.
- the switch 6 is either in the switch control signal S1 Switch position a or in switch position b and is therefore either for the output signal of the interpolator 2 or for the output signal of the Delay circuit 3 permeable.
- the output signal of the switch 6, which is an image signal with the second, higher resolution, is fed to a display 7 and there shown.
- This display is, for example, an LCD display.
- a computing unit 4 is used to generate the switch control signal S1 provided that furthermore a control signal S2 for the delay circuit 3 and provides a control signal S3 for the interpolator 2.
- the computing unit also stands with a memory 5 in connection.
- the image signal is analyzed in the computing unit 4 using the first one Release. As part of this analysis, in particular in the image signal existing transitions or flanks recognized.
- the computing unit takes care of it continue to store information about in the image signal Transitions occurring in the memory 5. In particular, data which saved the coordinates of the transition in the respective image and also the direction of the transition (light - dark or dark - light) and continues mark the course of an edge in the image.
- the computing unit 4 uses the current ones and those already stored Information about the transitions present in the image signal to determine the Control signals S1. S2 and S3.
- the information already saved about Transitions present in the image signal can be transitions that are in already transmitted image sections of the current field or full frame, or transitions that were detected in previous fields or frames, or both of the aforementioned transition types.
- Figure 2 shows a diagram illustrating a soft Transition.
- the signal curve E corresponds to that at input 1 applied image signal, the signal curve D at the output of the switch 6 provided image signal, which is shown on the display 7.
- the Input signal E has a smooth transition, which is characterized by a low jump is symbolized.
- the signal D derived therefrom, which on the display 7 is shown in this case by the interpolator determined. This has the consequence that due to the interpolation process in Signal D, which has a higher resolution than signal E, there is an intermediate stage on the basis of which this is shown on the display 7 represented signal a soft. natural transition.
- Figure 3 shows a diagram illustrating a hard Transition.
- the signal curve E corresponds to that at input 1 applied image signal, the signal curve D at the output of the switch 6 provided image signal, which is shown on the display 7.
- the Input signal E has a hard transition, which is caused by a high jump is symbolized.
- the signal D derived therefrom, which on the display 7 is shown, in this case by means of Delay circuit 3 generated.
- the im Input signal existing transition not through an interpolation process is polished, but remains, and as a hard jump also in the signal D, which is shown on the display, occurs.
- the signal D is only delayed compared to the signal E, this delay being chosen so that, on the one hand, the processing time in the computing unit 4, on the other hand is also adapted to the processing time in the interpolator 2 and History of the image content the correct temporally / geometrically correct position is determined.
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- 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)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Processing Or Creating Images (AREA)
- Picture Signal Circuits (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
- Studio Devices (AREA)
Abstract
Description
- einer ersten A/D-Wandlereinrichtung zum Abtasten eines analogen Bildeingangssignals nach dem Erzeugen eines ersten Abtasttaktes und zum Umwandeln dieses Signals in erste digitale Abstufungsdaten;
- einer zweiten A/D-Wandlereinrichtung zum Abtasten des analogen Bildeingangsignals nach dem Erzeugen eines zweiten Abtasttaktes mit derselben Periode und zum Umwandeln dieses Signals in zweite digitale Abstufungsdaten;
- einer mit dem Ausgang der ersten A/D-Wandlereinrichtung verbundenen Verzögerungseinrichtung zum Verzögern der ersten digitalen Abstufungsdaten um etwa eine halbe Periode des ersten Abtasttaktes;
- einer mit den Ausgängen der ersten A/D-Wandlereinrichtung und der Verzögerungseinrichtung verbundenen Selektionsschaltereinrichtung zum Selektieren und Ausgeben eines Ausgangssignals von diesen als Reaktion auf Selektionssteuersignal;
- einer Signalverarbeitungseinrichtung, die in Paarform digitaler Abstufungsdaten mit den Ausgangssignalen der Selektionsschaltereinrichtung und der zweiten A/D-Wandlereinrichtung versorgt wird, um diese in analoge Werte zum Ausgeben eines Paares analoger Abstufungsdaten umzuwandeln;
- einer Anzeigetafeleinrichtung mit mehreren Zeilenleitungen, mehreren Spaltenleitungen und diesen entsprechend angeordneten Bildelementen, um eine Abstufungsanzeige als Reaktion auf analoge Abstufungsdaten, welche an jedes von den Spaltenleitungen und Zeilenleitung selektiertes Bildelement geliefert werden, bereitzustellen;
- einer mit dem Paar analoger Abstufungsdatenanteile in einer sequentiellen Reihenfolge versorgten Source-Treibereinrichtung, zum Umwandeln dieser in parallele Paare analoger Abstufungsdatenanteile für jede vorgegebene Paaranzahl und Liefern dieser an die entsprechenden Spalten und Zeilen der Anzeigetafel;
- einer Gate-Treibereinrichtung zum selektiven Ansteuern der mehreren Zeilenleitungen der Anzeigetafel; und
- einer Steuereinrichtung, wodurch in einem Doppelauflösungsanzeigenmodus der erste und der zweite Abtasttakt erzeugt werden, nachdem sie um 180° in der Phase verschoben wurden, und das Selektionssteuersignal zum Steuern der Selektionsschaltereinrichtung erzeugt wird, um das Ausgangssignal der Verzögerungseinrichtung zu selektieren, und in einem Standardauflösungsanzeigemodus der erste und der zweite Abtasttakt gleichphasig zueinander erzeugt werden und das Selektionssteuersignal zum Steuern des Selektionsschalters erzeugt wird, um das Ausgangssignal der ersten A/D-Wandlereinrichtung zu selektieren.
- c) zuordnen einer Farbe zu jedem der vier dreieckigen Außenbereiche des ursprünglichen Rasterbildes, die gleich ist wie die Farbe der benachbarten Viererpixelgruppe in dem ursprünglichen Bild;
- d) wenn genau ein Paar von diagonal entgegengesetzten Bereichen der dreieckigen Außenbereiche dieselbe Farbe hat, Zuordnen dieser Farbe zu allen der dreieckigen Bereiche des inneren rechteckigen Bereichs, ansonsten Zuordnen derselben Farbe, die der benachbarte dreieckige Außenbereich hat, zu jedem dreieckigen Bereich des inneren rechteckigen Bereichs;
- e) Zuordnen eines jeden der dreieckigen Bereiche des ursprünglichen Rasterbildes zu ausgewählten Bildelementen des resultierenden Bildes und Zuordnen der Farben, die durch den Schritt d) den dreieckigen Bereichen des ursprünglichen Rasterbildes zugeordnet wurden, zu den entsprechenden der ausgewählten Bildelemente des resultierenden Rasterbildes.
- FIG 1
- ein Blockschaltbild einer Vorrichtung gemäß der Erfindung,
- FIG 2
- ein Diagramm zur Veranschaulichung eines weichen Übergangs, und
- FIG 3
- ein Diagramm zur Veranschaulichung eines harten Übergangs.
Das Ausgangssignal des Interpolators 2 wird einer Klemme a eines Schalters 6 zugeführt. Das Ausgangssignal der Verzögerungsschaltung 3 wird an die Klemme b des Schalters 6 weitergeleitet.
Claims (5)
- Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display, miteinem Eingang (1) für ein Bildsignal einer ersten Auflösung,einem mit dem Eingang (1) verbundenen ersten Signalweg, welcher einen Interpolator (2) aufweist, der ausgangsseitig ein Bildsignal mit einer zweiten, höheren Auflösung zur Verfügung stellt,einem mit dem Eingang (1) verbundenen zweiten Signalweg, welcher Verzögerungsmittel (3) aufweist, an deren Ausgang ebenfalls ein Bildsignal mit der zweiten, höheren Auflösung abgreifbar ist,einem an die beiden Signalwege angeschlossenen Schalter (6), der in Abhängigkeit von einem Schaltersteuersignal (S1) entweder das Ausgangssignal des ersten Signalweges oder das Ausgangssignal des zweiten Signalweges an seinem Ausgang zur Verfügung stellt,einem mit dem Schalter (6) verbundenen Display (7) zur Darstellung der Bildsignale mit der zweiten, höheren Auflösung, undeiner mit dem Eingang (1) verbundenen Recheneinheit (4), die zur Erzeugung des Schaltersteuersignales (S1) in Abhängigkeit vom Bildinhalt zeitlich vorhergehender Bildabschnitte des Bildsignals dient.
- Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß sie einen mit der Recheneinheit (4) verbundenen Speicher (5) zur Abspeicherung von Informationen über Signalflanken in zeitlich vorhergehenden Bildabschnitten des Bildsignals aufweist. - Vorrichtung nach Anspruch 1 oder 2.
dadurch gekennzeichnet,
daß die zeitlich vorhergehenden Bildabschnitte des Bildsignals Bildabschnitte des aktuellen Halb- oder Vollbildes sind. - Vorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet,
daß die zeitlich vorhergehenden Bildabschnitte des Bildsignals Bildabschnitte zeitlich vorhergehender Halb- oder Vollbilder sind. - Vorrichtung nach einem der vorhergehenden Ansprüche.
dadurch gekennzeichnet,
daß das Display (7) eine LCD-Anzeige ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19954029A DE19954029C1 (de) | 1999-11-11 | 1999-11-11 | Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display |
DE19954029 | 1999-11-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1100068A2 true EP1100068A2 (de) | 2001-05-16 |
EP1100068A3 EP1100068A3 (de) | 2003-01-08 |
EP1100068B1 EP1100068B1 (de) | 2009-01-07 |
Family
ID=7928528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00123963A Expired - Lifetime EP1100068B1 (de) | 1999-11-11 | 2000-11-03 | Vorrichtung zur Verbesserung der Bilddarstellung auf einem Display |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1100068B1 (de) |
AT (1) | ATE420429T1 (de) |
DE (2) | DE19954029C1 (de) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0439714A2 (de) * | 1990-01-05 | 1991-08-07 | International Business Machines Corporation | Antialiasingverfahren für eine graphische Anzeige |
JPH04180377A (ja) * | 1990-11-14 | 1992-06-26 | Matsushita Electric Ind Co Ltd | 表示装置 |
EP0610829A1 (de) * | 1993-02-05 | 1994-08-17 | Brooktree Corporation | Vorrichtung und Verfahren zur Anzeige von Informationen aus einem grafischen Speicher und einem Videospeicher auf einem Anzeigegerät |
US5764240A (en) * | 1994-08-31 | 1998-06-09 | S3 Incorporated | Method and apparatus for correction of video tearing associated with a video and graphics shared frame buffer, as displayed on a graphics monitor |
US5774110A (en) * | 1994-01-04 | 1998-06-30 | Edelson; Steven D. | Filter RAMDAC with hardware 11/2-D zoom function |
US5892551A (en) * | 1996-10-23 | 1999-04-06 | Nec Corporation | Circuit and method for reducing flicker |
JPH11231838A (ja) * | 1998-02-10 | 1999-08-27 | Fron Tec:Kk | 表示装置およびその駆動方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5168270A (en) * | 1990-05-16 | 1992-12-01 | Nippon Telegraph And Telephone Corporation | Liquid crystal display device capable of selecting display definition modes, and driving method therefor |
DE19714906A1 (de) * | 1997-04-04 | 1998-10-08 | Coin Inst Fuer Computer Integr | Verfahren zur Verbesserung der Bildauflösung bei Farbbildwiedergabegeräten |
-
1999
- 1999-11-11 DE DE19954029A patent/DE19954029C1/de not_active Expired - Fee Related
-
2000
- 2000-11-03 EP EP00123963A patent/EP1100068B1/de not_active Expired - Lifetime
- 2000-11-03 DE DE50015511T patent/DE50015511D1/de not_active Expired - Lifetime
- 2000-11-03 AT AT00123963T patent/ATE420429T1/de not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0439714A2 (de) * | 1990-01-05 | 1991-08-07 | International Business Machines Corporation | Antialiasingverfahren für eine graphische Anzeige |
JPH04180377A (ja) * | 1990-11-14 | 1992-06-26 | Matsushita Electric Ind Co Ltd | 表示装置 |
EP0610829A1 (de) * | 1993-02-05 | 1994-08-17 | Brooktree Corporation | Vorrichtung und Verfahren zur Anzeige von Informationen aus einem grafischen Speicher und einem Videospeicher auf einem Anzeigegerät |
US5774110A (en) * | 1994-01-04 | 1998-06-30 | Edelson; Steven D. | Filter RAMDAC with hardware 11/2-D zoom function |
US5764240A (en) * | 1994-08-31 | 1998-06-09 | S3 Incorporated | Method and apparatus for correction of video tearing associated with a video and graphics shared frame buffer, as displayed on a graphics monitor |
US5892551A (en) * | 1996-10-23 | 1999-04-06 | Nec Corporation | Circuit and method for reducing flicker |
JPH11231838A (ja) * | 1998-02-10 | 1999-08-27 | Fron Tec:Kk | 表示装置およびその駆動方法 |
Non-Patent Citations (2)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 016, no. 492 (E-1278), 12. Oktober 1992 (1992-10-12) & JP 04 180377 A (MATSUSHITA ELECTRIC IND CO LTD), 26. Juni 1992 (1992-06-26) * |
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 13, 30. November 1999 (1999-11-30) & JP 11 231838 A (FRON TEC:KK), 27. August 1999 (1999-08-27) * |
Also Published As
Publication number | Publication date |
---|---|
ATE420429T1 (de) | 2009-01-15 |
EP1100068A3 (de) | 2003-01-08 |
DE50015511D1 (de) | 2009-02-26 |
DE19954029C1 (de) | 2001-04-05 |
EP1100068B1 (de) | 2009-01-07 |
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