Method of announcing sessions

Details Method of announcing sessions Method of announcing sessions

H - Electricity

04

N

H04N 21/235 (2011.01) H04W 88/02 (2009.01) H04N 21/262 (2011.01) H04N 21/278 (2011.01) H04N 21/643 (2011.01) H04N 5/445 (2011.01)

Patent

CA 2510709

An electronic service guide (ESG) is provided by transmitting announcements describing multimedia sessions, such video streams. Sessions are organised into a session directory (28) which is split into two parts: a full session directory (291) and an updated session directory (292). A first kind of announcement describes all sessions in the full session directory. A second kind of announcement describes sessions in the updated session directory. Once a client has received a description of the full session directory, it need only listen to announcements of the second type so as to learn of any updates to sessions.

L'invention concerne un guide électronique de service (ESG) mis en oeuvre par transmission d'annonces décrivant des sessions multimédia, telles que des flux vidéo. Des sessions sont organisées dans un répertoire de session (28) qui est divisé en deux parties: un répertoire de réunion plénière (291) et un répertoire de mise à jour de session (292). Un premier genre d'annonce décrit tous les répertoires dans le répertoire de la réunion plénière. Un deuxième genre d'annonce décrit des répertoires dans le répertoire de session mise à jour. Une fois qu'un client a reçu une description du répertoire de la réunion plénière, il a seulement besoin d'écouter des annonces du deuxième type afin d'avoir connaissance de toutes les mises à jour des sessions.

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