A method of extracting sections of a data stream

G - Physics – 06 – F

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G06F 17/30 (2006.01)

Patent

CA 2675820

A method of extracting sections of a data stream (30), the sections comprising a set of sequences (2, 10, 14, 18), wherein each sequence is encoded separately and coupled together to define a section, comprises determining a combination of at least two sequences (2, 10) of the set; comparing the combination of sequences with sequences in the data stream; and rejecting (34) or accepting (39, 40) extraction of the section of the data stream based upon the result of the comparison. If the combination of sequences (2, 10) does not include a start and end marker (1, 19) for the section, a search for the start and end markers is carried out before the section is extracted.

L'invention concerne un procédé d'extraction de sections d'un flux de données (30). Lesdites sections comprennent un ensemble de séquences (2, 10, 14, 18), chacune codée séparément et toutes couplées pour définir une section. Ledit procédé comporte la détermination d'une combinaison d'au moins deux séquences (2, 10) de l'ensemble; la comparaison de la combinaison de séquences aux séquences comprises dans le flux de données; et le rejet (34) ou l'acceptation (39, 40) d'extraction de la section du flux de données selon le résultat de la comparaison. Si la combinaison de séquences (2, 10) ne comporte pas de marqueur de démarrage et de fin (1, 19) pour la section, une recherche des marqueurs de démarrage et de fin est réalisée avant que la section ne soit extraite.

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