Compression of motion vectors

H - Electricity – 04 – N

Patent

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Details

H04N 7/26 (2006.01) H04N 7/30 (2006.01) H04N 7/32 (2006.01) H04N 7/36 (2006.01) H04N 7/50 (2006.01)

Patent

CA 2424340

In a process for reducing the data rate of motion vector information, the components of the motion vectors are quantised, the quantised values are compressed and transmitted and the quantisation errors are additionally transmitted, whenever sufficient channel capacity is available. When not transmitted, the quantisation errors may be recreated at the encoder receiving the transmission. Where appropriate vectors may be translated to equivalent velocity values and passed through a linear transform, further reducing the required bit capacity.

L'invention concerne un procédé permettant de réduire le débit de données d'information de vecteur de mouvement dans lequel les composants desdits vecteurs de mouvement sont quantifiés, les valeurs quantifiées étant compressées et transmises, et les erreurs de quantification étant également transmises lorsque la capacité d'un canal est suffisante. Lorsque les erreurs de quantification ne sont pas transmises, elles peuvent être recréées au niveau d'un codeur qui reçoit la transmission. Lorsque des vecteurs appropriés peuvent être traduits en valeurs de vitesse équivalentes auxquelles on applique une transformée linéaire, la capacité binaire est réduite.

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