Method for recording or playback of low bitrate data streams

Details Method for recording or playback of low bitrate data streams Method for recording or playback of low bitrate data streams

G - Physics

11

B

G11B 20/12 (2006.01) G11B 27/034 (2006.01) G11B 27/10 (2006.01) G11B 27/30 (2006.01) G11B 27/32 (2006.01) H04N 9/804 (2006.01) H04N 5/85 (2006.01) H04N 7/24 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2395572

DVD Stream Recording shall be used for realtime recording and playback of given packetized bitstreams. The data of the bitstream are organized into Stream Object Units, which in turn consists of stream packs (O_S_P) with a stream pack header (P_H) followed by a stream packet (S_PES_P), wherein a stream packet (S_PES_P) contains further header data (PES_H, S_ID, A_H) and an Application Packet Area (A_P_A), which is filled with a sequence of Application Packets each prefixed by an Application Time Stamp (ATS). In case of very low bitrate stream recording empty packets are recorded, which are marked as stuffing packets. This ensures that every Stream Object Unit - even in areas where stuffing is performed - contains at least one Application Time Stamp value.

Selon la présente invention, l'enregistrement de trains DVD doit être utilisé pour l'enregistrement ou la lecture en temps réel de trains de bits en paquets donnés. Les données de train de bits sont organisées en unités d'objet de trains (<i>Stream Object Units</i>) qui sont elles constituées d'ensembles de trains (O_S_P) comportant une en-tête d'ensemble de trains (P_H) suivie d'un paquet de trains (S_PES_P). Un paquet de trains (S_PES_P) contient d'autres données d'en-tête (PES_H, S_ID, A_H) et une zone de paquet d'applications (A_P_A) qui est remplie d'une série de paquets d'applications chacune précédée d'une indication horaire d'application (ATS). Dans le cas d'un enregistrement de trains à très faible débit binaire, des paquets vides sont enregistrés et qualifiés de paquets de remplissage. Cela permet de garantir que chaque unité d'objet de train même dans des zones où a lieu le remplissage contient au moins une valeur d'identification horaire d'application.

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