Method for transmitting information stream, corresponding...

H - Electricity – 04 – L

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H04L 29/06 (2006.01)

Patent

CA 2448987

An information stream with video (V), audio (A) and data (D) components assembled in access units (Vtn, Atn, Dtn) with associated respective meta- information is transmitted on a set of communication channels (Cj), such as different lines of a mobile communication network. The stream is arranged in packets each of which contains at least a segment of access unit and a header (H). The header (H) in question comprises a first set of fields (HS), which represents the meta-information associated to the related access unit (s), and a second set of fields (HG), comprising general validity fields, independent from the information stream. Typically, these are fields that convey the following information: number (PN) of the packet in the order of transmission, identifier (CH) of the channel that carries a particular stream, length (L) of the data packet as well as check, for instance of the checksum type (CK). Preferably, the latter field is related to all the data of the header (H), except the check field itself.

Un flux d'information à composantes vidéo (V) audio (A) et de données (D) assemblées dans des unités d'accès (Vtn, Atn, Dtn) associées à une méta-information respective est transmis sur un ensemble de voies de communication (Cj), telles que différentes lignes d'un réseau de communication. Le flux est organisé en paquets dont chacun contient au moins un segment d'une unité d'accès et un en-tête (H). Ledit en-tête (H) comporte un premier ensemble de champs (HS), qui représente la méta-information associée à l'unité ou aux unités d'accès correspondante(s), et un deuxième ensemble de champs (HG), comprenant des champs de validité générale, indépendants du flux d'information. Selon l'invention, ce sont des champs qui transportent les informations suivantes: numéro (PN) du paquet dans l'ordre de transmission, identifiant (CH) de la voie qui transporte un flux particulier, la longueur (L) du paquet de données ainsi que le contrôle, par exemple du type total de contrôle (CK). De préférence, ce dernier champ est associé à toutes les données de l'en-tête (H) excepté le contrôle lui-même.

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