Flicker filter and interlacer implemented in a television...

H - Electricity – 04 – N

Patent

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Details

H04N 7/01 (2006.01) H04N 5/44 (2006.01)

Patent

CA 2316234

A television system (100) with an in-terlaced display screen for displaying net-work application data. A flicker filter (480) is preferably implemented as an infinite im-pulse response (IIR) filter to eliminate sharp transitions in the network application data images. A random access memory (RAM) is used to store the lines of the filtered im-ages and any adjacent lines used for the fil-tering operation. Alternate lines of the fil-tered images are retrieved from the RAM to provide an interlaced image of the filtered network application data images. The inter-laced images are displayed on an interlaced display unit of a television system.

L'invention concerne un système de télévision (100) comprenant un écran à affichage entrelacé servant à afficher des données d'application de réseau. On met en oeuvre un filtre anti-scintillement (480) se présentant de préférence sous la forme d'un filtre à réponse impulsionnelle infinie (RII) pour supprimer les brusques variations de couleur des images des données d'application de réseau. On utilise une mémoire vive pour stocker les lignes des images filtrées et toutes les lignes adjacentes utilisées pour l'opération de filtrage. On extrait de la mémoire vive des lignes alternées des images filtrées, qui servent à former les images entrelacées des images filtrées des données d'application de réseau. Les images entrelacées s'affichent sur une unité d'affichage entrelacé d'un système de télévision.

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