Global Patent Index - EP 0980059 A1

EP 0980059 A1 2000-02-16 - Method and apparatus for processing video pictures, especially for false contour effect compensation

Title (en)

Method and apparatus for processing video pictures, especially for false contour effect compensation

Title (de)

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

Title (fr)

Procédé et appareil pour le traitement d'images vidéo, en particulier pour la compensation de l'effet de faux contours

Publication

EP 0980059 A1 (EN)

Application

EP 99114587 A

Priority

  • EP 99114587 A
  • EP 98114883 A

Abstract (en)

With the new plasma display panel technology new kinds of artefacts can occur in video pictures. These artefacts are commonly described as "dynamic false contour effect", since they correspond to disturbances of gray levels and colors in the form of an apparition of colored edges in the picture when the observation point on the PDP screen moves. According to the invention, such an artefact is compensated by analyzing the motion in the pictures, assigning to each block of a picture a corresponding motion vector and performing a re-coding step in which the different sub-fields of a pixel are shifted to distribute the sub-fields of a pixel more closely on the eye trajectory. <IMAGE>

IPC 1-7 (main, further and additional classification)

G09G 3/28; H04N 5/21

IPC 8 full level (invention and additional information)

G09G 3/20 (2006.01); G09G 3/28 (2013.01)

CPC (invention and additional information)

G09G 3/2033 (2013.01); G09G 3/2029 (2013.01); G09G 3/28 (2013.01); G09G 2320/0261 (2013.01); G09G 2320/0266 (2013.01); G09G 2320/106 (2013.01)

Citation (search report)

  • [XY] EP 0822536 A2 19980204 - FUJITSU LTD [JP], et al
  • [Y] EP 0444962 A2 19910904 - HITACHI LTD [JP]
  • [A] PATENT ABSTRACTS OF JAPAN vol. 097, no. 009 30 September 1997 (1997-09-30)
  • [A] PATENT ABSTRACTS OF JAPAN vol. 096, no. 009 30 September 1996 (1996-09-30)

Designated contracting state (EPC)

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

EPO simple patent family

EP 0980059 A1 20000216; EP 0980059 B1 20050330

INPADOC legal status


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