Data block format for software carrier and player therefor

G - Physics – 06 – K

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Details

G06K 15/00 (2006.01) G11B 19/02 (2006.01) G11B 20/10 (2006.01) G11B 27/10 (2006.01) G11B 27/32 (2006.01) G11B 27/34 (2006.01) G11B 27/36 (2006.01) H04N 5/46 (2006.01) H04N 9/82 (2006.01) H04N 9/877 (2006.01) G11B 7/0037 (2006.01) G11B 7/013 (2006.01) G11B 20/00 (2006.01) G11B 20/12 (2006.01) H04N 5/85 (2006.01) H04N 5/913 (2006.01) H04N 9/804 (2006.01) H04N 9/806 (2006.01) H04N 5/44 (2006.01) H04N 5/445 (2006.01)

Patent

CA 2174225

A system using an optical disk format for representing several synchronized signals, e.g. multiple versions of motion pictures and multiple soundtracks which is made up of an optical disk (23), signal processors (67, 71), buffer circuitry (53, 55, 57, 59) and audio (91) and video (94) output devices. All signals are represented digitally, and the bits are arranged in data blocks. Each data block may contain a variable number of bits for each signal, ranging from none to many (relative to the other signals). This allows each signal to be represented by a variable rate bit stream, without one signal necessarily constraining another as far as bit representation is concerned .Multiple buffers are provided to insure that there are a sufficient number of bits available for each signal as required for immediate needs. When any buffer is full, reading of the data blocks stops temporarily so that no bits are lost.

Système utilisant une structure de disque optique permettant de représenter plusieurs signaux synchronisés tels que, par exemple, plusieurs versions d'images cinématographiques et plusieurs pistes sonores, et constitué d'un disque optique (23), de processeurs de signaux (67, 71), de circuits tampon (53, 55, 57, 59) et de dispositifs de sortie audio (91) et vidéo (94). Tous les signaux sont représentés de manière numérique, et les bits sont groupés dans des blocs de données. Chaque bloc de données peut contenir un nombre variable de bits associés à chaque signal, ce nombre variant entre zéro et un chiffre élevé (par rapport aux autres signaux). Ainsi, chaque signal est représenté par un train binaire à vitesse variable sans qu'un signal n'en limite nécessairement un autre, pour ce qui concerne la représentation binaire. Plusieurs tampons permettent d'assurer que le nombre de bits disponibles pour chaque signal est suffisant pour satisfaire des besoins immédiats. Lorsqu'un tampon est plein, la lecture des blocs de données s'arrête momentanément de sorte qu'aucun bit ne soit perdu.

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