Signaling protocol for satellite direct radio broadcast system

H - Electricity – 04 – B

Patent

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Details

H04B 7/185 (2006.01) H04J 3/00 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2309683

A satellite direct radio broadcast system (10) is provided which assembles bits of broadcast programs into prime rate increments, several of which are assembled into a frame. Frames are divided into symbols which are demultiplexed into alternating one of a plurality of prime rate channels. The prime rate channels are demultiplexed onto a corresponding number of broadcast frequencies for transmission to a satellite (25). The satellite payload switches the symbols into time division multiplexed (TDM) data streams. The receivers (29) process the TDM streams using service control headers (SCHs) provided therein by broadcast stations. The SCHs facilitate transmission of different service components within broadcast channel frames, association of a primary broadcast channel with one or more secondary broadcast channels on a frame-to-frame basis, and the transmission of multiframe bit streams, or auxiliary data throughout a broadcast channel that are independent of a service, in contiguous or non-contiguous frames.

L'invention porte sur un système (10) de radiodiffusion directe par satellite qui assemble des bits de programmes de diffusion sous forme de modules de débit de base dont plusieurs sont assemblées sous forme d'un bloc . Les blocs sont divisés en symboles qui sont démultiplexés en canaux alternés d'une pluralité de canaux de débit de base. Les canaux de débit de base sont démultiplexés sur un nombre correspondant de fréquences de diffusion en vue d'effectuer une transmission vers un satellite (25). La charge utile du satellite commute les symboles en trains de données à multiplexage temporel (MRT). Les récepteurs (29) traitent les trains MRT au moyen d'en-têtes de contrôle de service (SCH) ménagées par des stations de diffusion. Les SCH facilitent la transmission de différents composants de service dans les blocs de canaux de diffusion, l'association d'un canal de diffusion primaire avec un ou plusieurs canaux de diffusion secondaires sur une base bloc par bloc, et la transmission de trains binaires multiblocs ou de données auxiliaires dans un canal de diffusion qui sont indépendants d'un service, en bloc contigus ou non contigus.

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