Frame buffer for multimedia terminal

H - Electricity – 04 – N

Patent

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Details

H04N 7/26 (2006.01) G09G 5/36 (2006.01) G09G 5/399 (2006.01) H04N 5/00 (2006.01) H04N 7/56 (2006.01)

Patent

CA 2210370

A multimedia terminal for adapting audio-video signals into a digital data network is provided. The terminal comprises a video decoder, a video encoder, a frame buffer, and a host processor coupled to the frame buffer. The frame buffer has a plurality of memory fields, a system time clock that is switchable from a free running clock to being locked to the analog video signals and a frame buffer logic control circuit which controls the flow of data in and out of the memory fields. The frame buffer is able to operate in two distinct modes.

Terminal multimédia permettant d'adapter des signaux audio-vidéo dans un réseau de données numériques. Le terminal se compose d'un décodeur vidéo, d'un codeur vidéo, d'une mémoire vidéo et d'un système hôte couplé à la mémoire vidéo. Cette dernière comprend une série de champs de mémorisation, une horloge système pouvant être commutée en mode de fonctionnement libre ou en mode de fonctionnement asservi aux signaux vidéo analogiques et un circuit logique de commande de la mémoire vidéo qui commande le cheminement des données vers les champs de mémoire ou à partir de ceux-ci. La mémoire vidéo peut fonctionner selon deux modes distinctes.

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