Advanced, adaptive video multiplexer system

Details Advanced, adaptive video multiplexer system Advanced, adaptive video multiplexer system

H - Electricity

04

L

H04L 12/26 (2006.01) H04J 1/00 (2006.01) H04J 3/26 (2006.01) H04L 12/16 (2006.01) H04L 12/28 (2006.01) H04L 12/66 (2006.01) H04N 7/025 (2006.01) H04N 7/18 (2006.01) H04N 7/20 (2006.01) H04N 7/16 (2006.01) H04N 7/173 (2006.01)

Patent

CA 2537293

An advanced multiplexer designed and optimized for next generation on-demand video distribution is described. Features and capabilities include auto- discovery, channel-staggering and compatibility with static Virtual Channel Tables (VCTs). The multiplexer system facilitates auto-discovery by inserting identifiers into MPTSs (Multi-Program Transport Streams). These identifiers are echoed back to the multiplexer by the client set-top (570~x~) thereby indicating correspondence between modulators (552), service groups, and clients (570~x~). When modulating multiple channels, FEC frames (Forward Error Correction frames) are staggered across channels to reduce correlation and clipping in the IFFT processor (770).

L'invention concerne un multiplexeur avancé conçu et optimisé pour la distribution vidéo sur demande de nouvelle génération. L'invention se caractérise en ce qu'elle permet une auto-découverte, une répartition entre canaux et une compatibilité avec des tables de canaux virtuels (VCT) statiques. Ce système multiplexeur facilite la découverte automatique par insertion d'identificateurs dans les MPTS (flux de transport multi-programmes). Ces identificateurs sont renvoyés en écho vers le multiplexeur par le boîtier décodeur client (570'x'), ce qui indique une correspondance entre les modulateurs (552), les groupes de services et les clients (570'x'). Lors de la modulation de multiples canaux, des trames FEC (trames de correction aval des erreurs) sont réparties entre les canaux en vue d'une réduction de la corrélation et de la coupure dans le processeur IFFT (770).

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