Video transcoder

H - Electricity – 04 – N

Patent

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Details

H04N 7/50 (2006.01) H04J 3/02 (2006.01) H04N 7/26 (2006.01) H04N 7/58 (2006.01)

Patent

CA 2249606

A compressed video decoder/encoder (reencoder) system for varying the compression ratio of a compressed video program. The composite reencoder system implements tightly coupled elements for decoding and encoding compressed video data implementing techniques of header forwarding and utilizing an architecture in which a shared motion compensator supports both decoding and encoding operations simultaneously. The reencoder system may be introduced in a statistical multiplexer for generating a compressed video data stream multiplex suitable for use in cable distribution and other video distribution systems.

Système de décodeur/codeur (recodeur) comprimé permettant de faire varier le rapport de compression d'un programme vidéo comprimé. Le système de surcodage composite utilise des éléments étroitement couplés afin de décoder et de coder les données vidéo comprimées par des techniques de transmission d'en-tête, ainsi qu'une architecture dans laquelle un compensateur de mouvement partagé prend en charge simultanément les opérations de décodage et de codage. Le système de recodage peut être introduit dans un multiplexeur statistique, de façon à générer un multiplex d'un flux de données vidéo comprimées pouvant être utilisé dans la distribution câblée et dans d'autres systèmes de distribution vidéo.

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