A digital stream transcoder with a hybrid-rate controller

Details A digital stream transcoder with a hybrid-rate controller A digital stream transcoder with a hybrid-rate controller

H - Electricity

04

N

H04N 7/26 (2006.01) H04N 7/50 (2006.01)

Patent

CA 2520158

A rate controller in a transcoder, which receives a stream of compressed frames carried in a bit stream, selectively determines whether to quantize and/or threshold slices of a frame carried in the stream of frames. The rate controller determines the input size of the frame and based at least in part upon at least a desired size, requantizes and/or thresholds the frame such that the output size of the frame is approximately the desired size.

L'invention concerne un contrôleur de débit dans un transcodeur, qui reçoit un flux de trames comprimées transportées dans un train binaire, détermine de manière sélective s'il doit quantifier et/ou seuiller des tranches d'une trame transportée dans le flux de trames. Le contrôleur de débit détermine la taille d'entrée de la trame et sur la base, du moins partiellement, d'au moins une taille recherchée, quantifie une nouvelle fois la trame et/ou en établit un seuil, la taille de sortie de la trame représentant alors approximativement la taille recherchée.

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