Adaptive leak hdtv encoder

Details Adaptive leak hdtv encoder Adaptive leak hdtv encoder

H - Electricity

04

N

H04N 7/50 (2006.01) G06T 9/00 (2006.01) H04N 7/32 (2006.01) H04N 7/36 (2006.01)

Patent

CA 2100475

An improved predictive encoder where the leak signal is a function of the buffer fullness of the encoder. More specifically, the signals stored in theencoder output buffer are further encoded based on the fullness of the buffer, and information about this further encoding is used in determining the leak factor level. In accordance with another improvement, this leak factor level is not constrained to granularity that is imposed by the decoder hardware. Removal of the constraints is accomplished by cycling through a sequence of permissible leak levels that averages at the desired level.

L'invention est un codeur prédictif amélioré dans lequel le signal de fuite est fonction du volume stocké dans le tampon du codeur. Plus exactement, les signaux stockés dans le tampon de sortie du codeur sont soumis à un nouveau codage basé sur le volume du contenu du tampon et l'information se rapportant à ce nouveau codage est utilisée pour déterminer le niveau de fuite. Dans une autre concrétisation de l'invention, le niveau de fuite n'est pas soumis aux contraintes de granularité imposées par le matériel de décodage. L'élimination de ces contraintes se fait en passant cycliquement par une suite de niveaux de fuite dont le niveau moyen correspond au niveau désiré.

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