Multiplexing octets from a data flow over mpeg packets

H - Electricity – 04 – L

Patent

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Details

H04L 5/14 (2006.01) H04J 3/24 (2006.01) H04L 29/02 (2006.01) H04N 7/50 (2006.01) H04N 7/58 (2006.01)

Patent

CA 2571686

Multiplexing of information from a plurality of information flows into fixed~length packets such as, but not limited to, MPEG packets allows efficient utilization of bandwidth and also can be used to reduce transmission latency. In addition, utilizing MPEG packets and transport streams for octet multiplexing allows the packets carrying octet-multiplexed data to easily be integrated with other MPEG packets for other services that are commonly found in cable transmission networks of all coax, hybrid fiber coax, and/or all fiber. Moreover, the multiplexing techniques described herein will work in both wired (or constrained media) and wireless (or free-space propagation) environments. The multiplexing/demultiplexing of octets using MPEG packets generally is described by mappings that specify the use of octets in MPEG packets. Changes to allocations in a map generally should be propagated in a way that reliably ensures that both the transmitter and receiver have a consistent view of the octet mappings.

L'invention porte sur le multiplexage d'informations à partir d'une pluralité de flux d'informations et donnant des paquets de longueur fixe tels que, mais pas exclusivement, des paquets MPEG, e qui permet d'utiliser efficacement la largeur de bande et de réduire les retards de transmission. De plus, l'utilisation des paquets MPEG et des flux de transport pour le multiplexage d'octets permet d'intégrer facilement les paquets acheminant des données à multiplexage d'octets à d'autres paquets MPEG pour d'autres services qui se trouvent généralement sur des réseaux de transmission par câble totalement coaxiaux, hybrides-fibres-coaxiaux et/ou toutes fibres. En outre, les techniques de multiplexage de l'invention sont compatibles avec à la fois des environnements filaires et des environnements radio. De manière générale, l'invention porte sur le multiplexage/démultiplexage d'octets utilisant des paquets MPEG qui fait généralement intervenir des tables de correspondance spécifiant l'utilisation des octets dans des paquets MPEG. Les modifications concernant les affectations dans les tables de correspondance doivent être normalement répercutées d'une manière garantissant de manière fiable que aussi bien l'émetteur que le récepteur gardent une même vue cohérente des correspondances entre octets.

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