System for transmitting audio data between a master unit and...

H - Electricity – 04 – L

Patent

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Details

H04L 7/04 (2006.01) G10H 1/00 (2006.01) H04L 29/02 (2006.01)

Patent

CA 2459805

The invention relates to a system for transmitting audio data between a master unit and slave units by means of a digital communication network. The inventive system comprises a master unit (1) and slave units (2) that can be connected in a chain and/or star configuration by means of a digital communication network, e.g. Ethernet-type network. Said system is synchronised on the clock of the master unit which supplies synchronisation information over the network to all the data frames. Each slave unit recreates the clock from the frames received. The data frames comprise data packets which can be, in particular, control data, audio data or video data. Each packet comprises a header describing the contents of the packet. Each slave unit is aware of the location in the packet of the data intended for same and of the location in the packet where data can be introduced.

Le système comporte un module maître (1) et des modules esclaves (2) pouvant être connectés en chaîne et/ou en étoile par l'intermédiaire d'un réseau de communication numérique, par exemple de type Ethernet. Le système est synchronisé sur l'horloge du module maître qui fournit des informations de synchronisation à toutes les trames de données qu'il envoie sur le réseau. Chaque module esclave reconstitue l'horloge à partir des trames qu'il reçoit. Les trames de données comportent des paquets de données, qui peuvent notamment être des données de commande, des données audio ou des données video. Chaque paquet comporte un en-tête décrivant le contenu du paquet. Chaque module esclave sait à quel emplacement d'un paquet se trouvent les données qui lui sont destinées et dans quel emplacement d'un paquet il peut introduire des données.

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