Method and apparatus for simultaneously recording and...

Details Method and apparatus for simultaneously recording and... Method and apparatus for simultaneously recording and...

G - Physics

11

B

G11B 20/12 (2006.01) G11B 20/10 (2006.01) G11B 27/034 (2006.01) G11B 27/10 (2006.01) H04N 5/76 (2006.01) H04N 5/765 (2006.01) G11B 27/036 (2006.01) H04N 5/781 (2006.01) H04N 5/85 (2006.01)

Patent

CA 2291145

Various measures are proposed for enabling simultaneous reading and writing of real time information, such as a digital video signal, from/onto a disc-like record carrier. The measures embody several read/write-scheduling algorithms for writing/reading blocks of information recorded in fixed sized fragment areas on the record carrier. Typically one writing action and a plurality of readings actions are employed in one read/write cycle of either a fixed duration or of a variable duration. In particular the proposed measures enable reading and writing of edited files. Further embodiments may require a re- ordering of read actions in a read/write cycle.

Diverses mesures sont proposées pour permettre la lecture et l'écriture simultanées d'informations en temps réel, telles qu'un signal vidéo numérique, sur ou à partir d'un support d'enregistrement de type disque. Les mesures prévoient plusieurs algorithmes de programmation de la lecture/écriture pour l'écriture/la lecture de blocs d'informations enregistrées dans des parties fragmentaires de dimensions fixes sur le support d'enregistrement. Typiquement, une action d'écriture et une pluralité d'actions de lecture sont employées dans un cycle de lecture/écriture soit d'une durée fixe, soit d'une durée variable. En particulier, les mesures proposées permettent la lecture et l'écriture de fichiers édités. D'autres modes de réalisation peuvent nécessiter une remise en ordre d'actions de lecture dans un cycle de lecture/écriture.

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