EP0980059B1 - Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts - Google Patents

Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts Download PDF

Info

Publication number
EP0980059B1
EP0980059B1 EP19990114587 EP99114587A EP0980059B1 EP 0980059 B1 EP0980059 B1 EP 0980059B1 EP 19990114587 EP19990114587 EP 19990114587 EP 99114587 A EP99114587 A EP 99114587A EP 0980059 B1 EP0980059 B1 EP 0980059B1
Authority
EP
European Patent Office
Prior art keywords
sub
field
pixel
code word
motion vector
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
EP19990114587
Other languages
English (en)
French (fr)
Other versions
EP0980059A1 (de
Inventor
Sebastien Weitbruch
Gangolf Hirtz
Carlos Correa
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.)
Deutsche Thomson Brandt GmbH
Original Assignee
Deutsche Thomson Brandt 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
Priority claimed from EP98114883A external-priority patent/EP0978817A1/de
Application filed by Deutsche Thomson Brandt GmbH filed Critical Deutsche Thomson Brandt GmbH
Priority to EP19990114587 priority Critical patent/EP0980059B1/de
Publication of EP0980059A1 publication Critical patent/EP0980059A1/de
Application granted granted Critical
Publication of EP0980059B1 publication Critical patent/EP0980059B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2033—Display of intermediate tones by time modulation using two or more time intervals using sub-frames with splitting one or more sub-frames corresponding to the most significant bits into two or more sub-frames
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G09G3/2029—Display of intermediate tones by time modulation using two or more time intervals using sub-frames the sub-frames having non-binary weights
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0266—Reduction of sub-frame artefacts
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/10—Special adaptations of display systems for operation with variable images
    • G09G2320/106—Determination of movement vectors or equivalent parameters within the image
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/28—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 using controlled light sources using luminous gas-discharge panels, e.g. plasma panels

Definitions

  • the invention relates to a method and apparatus for processing video pictures, especially for false contour effect compensation. More specifically the invention is closely related to a kind of video processing for improving the picture quality of pictures which are displayed on matrix displays like plasma display panels (PDP) or display devices with digital micro mirror arrays (DMD).
  • PDP plasma display panels
  • DMD digital micro mirror arrays
  • plasma display panels are known for many years, plasma displays are encountering a growing interest from TV manufacturers. Indeed, this technology now makes it possible to achieve flat color panels of large size and with limited depths without any viewing angle constraints.
  • the size of the displays may be much larger than the classical CRT picture tubes would have ever been allowed.
  • the invention deals with a specific new artefact, which is called "dynamic false contour effect" since it corresponds to disturbances of gray levels and colors in the form of an apparition of colored edges in the picture when an observation point on the matrix screen moves.
  • This kind of artefact is enhanced when the image has a smooth gradation like when the skin of a person is being displayed (e. g. displaying of a face or an arm, etc.).
  • the same problem occurs on static images when observers are shaking their heads and that leads to the conclusion that such a failure depends on the human visual perception and happens on the retina of the eye.
  • pulse equalization technique This technique is a more complex one. It utilizes equalizing pulses which are added or separated from the TV signal when disturbances of gray scales are foreseen.
  • LUT big look-up tables
  • the bid disadvantage of this technique results from the fact that the equalizing pulses add failures to the picture to compensate for a failure appearing on the eye retina. Additionally, when the motion is increasing in the picture, there is a need to add more pulses to the picture and that leads to conflicts with the picture contents in case of very fast motion.
  • the compensation of the false contour effect is made by utilizing a motion estimator which determines motion vectors for blocks of pixel data.
  • the resulting motion vectors are utilized for re-coding the pixels of the block wherein in the re-coding step a step of shifting the sub-fields of pixels is included.
  • the so calculated pixels of the block are used to display the picture instead of displaying the original pixel data.
  • the general idea of the invention is to detect the movements in the picture (displacement of the eye focus area) and to spread the right sub-field pulses over this displacement in order to be sure that the eye will only perceive the correct information through its movement.
  • This solution based on a motion estimator has the big advantage that it will not add false information in the picture and, in addition, this solution is independent from the picture contents and also from the sub-field organization. Further advantages are, that the inventive method allows a complete correction of the false contour effect when the motion vector is well-known. Also the method is not dependent from the used addressing technique for the plasma display panel. With regard to the disclosed specific embodiment, when the addressing or the sub-field organization changes, there is only the need to re-calculate the different centers of gravity of the sub-fields but the algorithm remains unchanged.
  • the method according to the invention is simple to implement. There is no need of a big memory since it does not need any kind of LUTs like the pulse equalization technique.
  • Fig. 1 The artefact due to the false contour effect is shown in Fig. 1.
  • two dark lines On the arm of the displayed woman are shown two dark lines, which e. g. are caused by this false contour effect. Also in the face of the woman such dark lines occur on the right side.
  • a plasma display panel utilizes a matrix array of discharge cells which could only be switched ON or OFF. Also unlike a CRT or LCD in which gray levels are expressed by analog control of the light emission, in a PDP the gray level is controlled by modulating the number of light pulses per frame. This time-modulation will be integrated by the eye over a period corresponding to the eye time response. When an observation point (eye focus area) on the PDP screen moves, the eye will follow this movement. Consequently, it will no more integrate the light from the same cell over a frame period (static integration) but it will integrate information coming from different cells located on the movement trajectory. Thus it will mix all the light pulses during this movement which leads to a faulty signal information. This effect will now be explained in more detail below.
  • each level will be represented by a combination of the following 8 bits:
  • the frame period will be divided in 8 lighting periods which are also very often referred to sub-fields, each one corresponding to one of the 8 bits.
  • the light emission pattern according to the sub-field organization introduces new categories of image quality degradation corresponding to disturbances of gray levels and colors.
  • these disturbances are defined as so-called dynamic false contour effect since the fact that it corresponds to the appearance of colored edges in the picture when an observation point on the PDP screen moves.
  • the observer has the impression of a strong contour appearing on a homogeneous area like displayed skin.
  • the degradation is enhanced when the image has a smooth gradation and also when the light emission period exceeds several milliseconds. So, in dark scenes the effect is not so disturbing as in scenes with average gray level (e.g. luminance values from 32 to 223).
  • Fig. 3 shows a darker shaded area corresponding to the luminance level 128 and a lighter shaded area corresponding to the luminance area level 127.
  • the sub-field organization, shown in Fig. 2 is used for building the luminance levels 128 and 127 as it is depicted on the right side of Fig. 3.
  • the three parallel lines in Fig. 3 indicate the direction in which the eye is following the movement.
  • the two outer lines show the area borders where a faulty signal will be perceived.
  • Fig. 4 there is shown a curve which illustrates the behavior of the eye cells during observing the moving picture depicted in Fig. 3. The eye cells having a good distance from the horizontal transition will integrate enough light from the corresponding pixels. Only the eye cells which are near the transition will not be able to integrate a lot of light from the same pixels.
  • a new sub-field organization which has more sub-fields and above all has more sub-fields with the same weight. This will already reduce the contouring effect and improve the situation. Furthermore, it allows for the inventive correction method which will be explained afterwards.
  • Fig. 5 two examples of new coding schemes are shown. The choice of the optimal one has to be made depending on the plasma technology. In the first example there are ten sub-fields used wherein there are four sub-fields having lighting periods with a relative duration of 48/256. In the second example there are twelve sub-fields and there are seven sub-fields having the relative duration of 32/256. Please note that the frame period has a relative duration of 256/256.
  • Fig. 6 the result of the new sub-field organization according to the second example of Fig. 5 is shown in case of the 128/127 horizontal transition moving at a speed of five pixels per frame. Now, the chance that the corresponding eye cells will integrate more similar amounts of lighting periods is increased. This is illustrated by the eye-stimuli integration curve at the bottom of Fig. 6 when compared to the eye-stimuli integration curve at the bottom of Fig. 3.
  • the main idea of the invention is to anticipate the movement in the picture in order to position the different bit planes of the moving area on the eye integration trajectory.
  • the different bit planes of a pixel are shifted depending on the eye movement to make sure that the eye will receive the right information at the right time during its movement.
  • This principle is illustrated in Fig. 7. There it is shown that in the area around the horizontal transition the sixth and seventh bit plane is shifted by one pixel to the right, the eighth bit plane is shifted by two pixels to the right and the ninth bit plane is shifted by three pixels to the right.
  • this technique aims to modify the coding of the pixels depending on the motion amplitude and direction. This technique shows very good result since it makes it possible to remove completely the false contour effect when the motion is well detected. In the case of a false motion estimation, since no pulses are added to the picture but picture contents are shifted, the picture quality is not disturbed a lot.
  • the algorithm is described in greater detail.
  • the original picture is segmented in blocks, each of which will have a single motion vector assigned.
  • An example of such a decomposition is shown in Fig. 8.
  • Other types of motion-dependent pictures segmentations could be used, since the goal is only to decompose the picture in basic elements having a well-defined motion vector.
  • all motion estimators can be used for the invention, which are able to subdivide a picture in blocks and to calculate for each block a corresponding motion vector.
  • motion estimators are well-known from, for example 100 Hz up-conversion technique and also from MPEG coding etc., they are well-known in the . art and there is no need to describe them in greater detail here.
  • a motion estimator which could be used in this invention, it is referred to WO-A-89/08891. Best to be used are motion estimators which give precisely the direction of the movement and the amplitude of this movement for each block. Since most of the plasma display panels are working on RGB component data, benefit could be achieved when for each RGB component a separate motion estimation.is being carried out and these three components are combined so that the efficiency of the motion estimation will be improved.
  • G(n) S(n) + Dur(n)/2
  • G(n) represents the center of gravity location of a current sub-field
  • n represents the current sub-field number
  • S(n) represents the start point of the current sub-field
  • Dur(n) represents the duration of the sub-field
  • Fig. 11 On the right side of Fig. 11 it is depicted by which amount the corresponding sub-fields are to be shifted. For example, the first four sub-fields are not shifted in horizontal direction, the fifth and sixth sub-fields are shifted by one pixel in the horizontal direction and the seventh sub-field is shifted by two pixels in the horizontal direction, etc.
  • bit planes will be moved in both directions horizontal and vertical.
  • FIG. 12 An apparatus according to the invention is shown in Fig. 12.
  • the apparatus may be integrated together with the PDP matrix display. It could also be in a separate box which is to be connected with the plasma display panel.
  • Reference no. 10 denotes the whole apparatus.
  • Reference no. 11 denotes the frame memory to which the RGB data is input. The frame memory 11 is connected to the motion estimator 12.
  • Motion estimator 12 also receives as another input the RGB data of the next frame. So it has access to two succeeding frames in order to detect the motion in the video pictures. The resulting motion vectors are output to the sub-field-shift-computing unit 13.
  • the resulting sub-field shifts are output to the correction device 14 in which the pixels are re-coded, wherein sub-fields (SF) of pixels are shifted in a direction determined by the motion vector of the block, and corresponding new re-coded RGB data is output.
  • SF sub-fields

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of Gas Discharge Display Tubes (AREA)

Claims (7)

  1. Verfahren zur Verarbeitung von Videobildern, insbesondere zur Korrektur von falschen Kontureffekten, die aus Pixeln bestehen, denen jeweils ein Eingangs-Videowert zugeordnet ist, wobei ein Bewegungsvektor (Vx, Vy) für die Pixel (B1, B2) des Bildes berechnet wird und ein Eingangs-Videowert des Pixels in ein digitales Codewort umgewandelt wird, das die Länge der Zeitdauer bestimmt, während der das entsprechende Pixel einer Anzeige aktiviert wird, wobei jedem Bit des digitalen Codewortes - nachfolgend als Unterfeld-Codewort bezeichnet - eine bestimmte Dauer zugeordnet wird - nachfolgend als Unterfeld (SF) bezeichnet - und der Bit-Eintrag in das Unterfeld-Codewort bestimmt, ob das Pixel während des zugeordneten Unterfeldes (SF) für Lichtausgang aktiviert oder deaktiviert wird, dadurch gekennzeichnet, dass Schiebe-Koordinaten (Δx, Δy) für die Einträge in dem Unterfeld-Codewort eines Pixels in Abhängigkeit des berechneten Bewegungsvektors (Vx, Vy) des Pixels berechnet werden, und ferner gekennzeichnet durch Verarbeitung des Unterfeld-Codewortes des Pixels durch Verschieben der Unterfeld-Codewort-Einträge in dem ursprünglichen Unterfeld-Codewort des Pixels gemäß den berechneten Schiebe-Koordinaten (Δx, Δy) zu Pixelorten entlang dem berechneten Bewegungsvektor (Vx, Vy).
  2. Verfahren nach Anspruch 1, bei dem Schwerpunkte (CG) jedes Unterfeldes (SF) in einer Vollbildperiode für die Berechnung der Verschiebe-Koordinaten ((Δx, Δy) verwendet werden, wobei die Schwerpunkte (CG) gemäß der Formel berechnet werden: G (n) = S (n) + Dur(n)/2, worin bedeuten: G(n) den Ort des Schwerpunktes in der Vollbildperiode; n die gegenwärtige Unterfeld-Nummer; S(n) die Startposition des gegenwärtigen Unterfeldes; und Dur(n) die Dauer des gegenwärtigen Unterfeldes.
  3. Verfahren nach Anspruch 2, bei dem die Berechnung der Schiebe-Koordinaten ((Δxn, Δyn) nach der Formel erfolgt: Δxn = Vx.G(n)/Dur(F) und Δyn = Vy.G(n)/Dur(F); worin bedeuten: Δxn die Verschiebung eines Unterfeld-Codewort-Eintrags eines gegenwärtigen Unterfeldes in x-Richtung; Δyn die Verschiebung eines Unterfeld-Codewort-Eintrags eines gegenwärtigen Unterfeldes in y-Richtung; Vx die x-Komponente des Bewegungsvektors und Vy die y-Komponente des Bewegungsvektors; G(n) die Position des Schwerpunktes des Unterfeldes in der Vollbildperiode; n die gegenwärtige Unterfeld-Nummer; und Dur(F) die vollständige Dauer des Vollbildes.
  4. Verfahren nach einem der Ansprüche 1 bis 3, bei dem die folgende Unterfeld-Organisation verwendet wird: die Vollbildperiode wird in zwölf Unterfelder unterteilt, wenn die Vollbildperiode eine relative Dauer von 256 Zeiteinheiten hat; dann haben die Unterfelder die folgende Dauer: Unterfeld-Nummer Dauer/Relative Zeiteinheiten 1 1 2 2 3 4 4 8 5 16 6 32 7 32 8 32 9 32 10 32 11 32 12 32
  5. Verfahren nach einem der Ansprüche 1 bis 4, bei dem jedes Unterfeld (SF) einer spezifischen Beleuchtungsperiode des Pixels des Video-Vollbildes entspricht.
  6. Vorrichtung zur Verarbeitung von Videobildern, insbesondere zur Korrektur von falschen Kontureffekten, die aus Pixeln bestehen, wobei die Vorrichtung eine Kodiereinheit umfasst, in der die Eingangs-Videodaten der Pixel digital kodiert werden, wobei das digitale Codewort die Länge der Zeitdauer bestimmt, während der das entsprechende Pixel einer Anzeige aktiviert wird, wobei jedem Bit eines digitalen Codewortes - nachfolgend als Unterfeld-Codewort bezeichnet - eine bestimmte Dauer zugeordnet wird - nachfolgend als Unterfeld bezeichnet - und der Bit-Eintrag in dem Unterfeld-Codewort bestimmt, ob das Pixel für Lichtausgang während des zugeordneten Unterfeldes aktiviert oder deaktiviert wird, wobei die Vorrichtung einen Bewegungsabschätzer (12) zur Berechnung eines Bewegungsvektors (Vx, Vy) für ein Pixel eines Video-Vollbildes umfasst, dadurch gekennzeichnet, dass die Vorrichtung ferner eine Berechnungseinheit (13) zur Berechnung von Schiebe-Koordinaten (Δx, Δy) für die Einträge in dem Unterfeld-Codewort des Pixels in Abhängigkeit von dem berechneten Bewegungsvektor (Vx, Vy) des Pixels umfasst, und dass die Vorrichtung Verarbeitungsmittel (14) zur Verarbeitung der Unterfeld-Codeworte des Pixels durch Verschieben der Unterfeld-Codewort-Einträge in dem ursprünglichen Unterfeld-Codewort des Pixels gemäß den berechneten Schiebe-Koordinaten (Δx, Δy) an Pixelorte entlang des berechneten Bewegungsvektors (Vx, Vy) umfasst.
  7. Vorrichtung nach Anspruch 6, die eine Matrix-Anzeige, insbesondere eine Plasma- oder DMD-Anzeige umfasst.
EP19990114587 1998-08-07 1999-07-26 Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts Expired - Lifetime EP0980059B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19990114587 EP0980059B1 (de) 1998-08-07 1999-07-26 Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP98114883A EP0978817A1 (de) 1998-08-07 1998-08-07 Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts
EP98114883 1998-08-07
EP19990114587 EP0980059B1 (de) 1998-08-07 1999-07-26 Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts

Publications (2)

Publication Number Publication Date
EP0980059A1 EP0980059A1 (de) 2000-02-16
EP0980059B1 true EP0980059B1 (de) 2005-03-30

Family

ID=26149513

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19990114587 Expired - Lifetime EP0980059B1 (de) 1998-08-07 1999-07-26 Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts

Country Status (1)

Country Link
EP (1) EP0980059B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1207510A1 (de) 2000-11-18 2002-05-22 Deutsche Thomson-Brandt Gmbh Verfahren und Vorrichtung zur Bearbeitung von Videobildern
DE20122842U1 (de) 2001-05-08 2008-07-17 Deutsche Thomson Ohg Einrichtung zum Verarbeiten von Videobildern
FR2824947B1 (fr) 2001-05-17 2003-08-08 Thomson Licensing Sa Procede d'affichage d'une sequence d'image video sur un panneau d'affichage au plasma

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2720607B2 (ja) * 1990-03-02 1998-03-04 株式会社日立製作所 表示装置、階調表示方法及び駆動回路
JP3158904B2 (ja) * 1994-10-19 2001-04-23 株式会社富士通ゼネラル ディスプレイパネルの映像表示方法
JPH09138666A (ja) * 1995-11-10 1997-05-27 Fujitsu General Ltd 表示装置の動画補正方法及び動画補正装置
JP3719783B2 (ja) * 1996-07-29 2005-11-24 富士通株式会社 中間調表示方法および表示装置

Also Published As

Publication number Publication date
EP0980059A1 (de) 2000-02-16

Similar Documents

Publication Publication Date Title
US6473464B1 (en) Method and apparatus for processing video pictures, especially for false contour effect compensation
EP0978816B1 (de) Verfahren und Vorrichtung zur Videobildbearbeitung, insbesondere zur Kompensation des Falschkontureffekts
US7339632B2 (en) Method and apparatus for processing video pictures improving dynamic false contour effect compensation
KR100603390B1 (ko) 디스플레이 장치에서의 디스플레이를 위한 비디오 화상을처리하기 위한 방법 및 상기 방법을 수행하기 위한 장치
JP2002372948A (ja) Ｐｄｐの駆動方法および表示装置
EP1174825B1 (de) Verfahren und Vorrichtung zur Vearbeitung von Videobildern
US7023450B1 (en) Data processing method and apparatus for a display device
US6373477B1 (en) Display driving
EP1058229B1 (de) Verfahren und Anordnung zur Verarbeitung von Videosignalen
EP0980059B1 (de) Verfahren und Vorrichtung zur Bearbeitung von Videobildern, insbesondere zur Kompensation des Falschkontureffekts
KR100784945B1 (ko) 비디오 화상을 처리하기 위한 방법 및 장치
EP1162571B1 (de) Verfahren und Vorrichtung zur Videobildbearbeitung zur Kompensation des Falschkontureffekts
EP0987675A1 (de) Vorrichtung und Verfahren zur Video-Bildbearbeitung, insbesondere zur Kompensation des Falschkontureneffekts

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000720

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

17Q First examination report despatched

Effective date: 20021030

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CORREA, CARLOS

Inventor name: HIRTZ, GANGOLF

Inventor name: WEITBRUCH, SEBASTIEN

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: KIRKER & CIE SA

REF Corresponds to:

Ref document number: 69924437

Country of ref document: DE

Date of ref document: 20050504

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050726

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050726

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050907

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2241216

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20060102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 18

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 19

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69924437

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R082

Ref document number: 69924437

Country of ref document: DE

Representative=s name: HOFSTETTER, SCHURACK & PARTNER PATENT- UND REC, DE

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20180614

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IE

Payment date: 20180710

Year of fee payment: 20

Ref country code: IT

Payment date: 20180713

Year of fee payment: 20

Ref country code: FR

Payment date: 20180723

Year of fee payment: 20

Ref country code: GB

Payment date: 20180629

Year of fee payment: 20

Ref country code: ES

Payment date: 20180801

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20180625

Year of fee payment: 20

Ref country code: CH

Payment date: 20180713

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20181024

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 69924437

Country of ref document: DE

Representative=s name: DEHNS, DE

Ref country code: DE

Ref legal event code: R081

Ref document number: 69924437

Country of ref document: DE

Owner name: INTERDIGITAL CE PATENT HOLDINGS, FR

Free format text: FORMER OWNER: DEUTSCHE THOMSON-BRANDT GMBH, 78048 VILLINGEN-SCHWENNINGEN, DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: INTERDIGITAL CE PATENT HOLDINGS

Effective date: 20190624

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69924437

Country of ref document: DE

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20190725

REG Reference to a national code

Ref country code: IE

Ref legal event code: MK9A

REG Reference to a national code

Ref country code: BE

Ref legal event code: MK

Effective date: 20190726

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 292317

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190726

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20190726

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20190725

REG Reference to a national code

Ref country code: AT

Ref legal event code: PC

Ref document number: 292317

Country of ref document: AT

Kind code of ref document: T

Owner name: INTERDIGITAL CE PATENT HOLDINGS, FR

Effective date: 20191115

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20201204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20190727