H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 7/10 (2006.01) H04N 5/04 (2006.01) H04N 7/14 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01) H04N 7/173 (2006.01) H04N 7/24 (2006.01)
Patent
CA 2300879
A rapid channel changer for use in a digital broadband access system. The subject rapid channel changer includes a cache buffer (50) for storing the video data and a processor (55) for detecting and pointing to the synchronization frames. When a subscriber's channel change request is received by the processing unit, the corresponding video signal can be quickly accessed and directed downstream to the subscriber, since the processor (55) can immediately synchronize the video data without having to wait for the next synchronization frame.
Ce changeur rapide de canal est destiné à un système d'accès numérique large bande. En l'occurrence, le changeur rapide de canal comporte un tampon antémémoire (50) permettant de stocker les données vidéo, et un processeur permettant de détecter les trames de synchronisation et d'y renvoyer. Lorsqu'une demande de changement de canal d'abonné est reçue par l'unité de traitement, le signal vidéo correspondant est rapidement accessible. Il peut donc être réacheminé en aval vers l'abonné étant donné que le processeur (55) peut immédiatement synchroniser les données vidéo sans avoir à attendre la trame de synchronisation suivante.
Next Level Communications
Shapiro Cohen
LandOfFree
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