Video quality objective evaluation device, evaluation...

H - Electricity – 04 – N

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H04N 17/00 (2006.01) H04N 17/04 (2006.01)

Patent

CA 2582531

A video quality objective evaluation device includes: a temporal/spatial characteristic deriving unit (12) for deriving a temporal/spatial characteristic amount (PC) which is a deterioration characteristic generated in a deteriorated video signal (PI), from the deteriorated video signal (PI) to be evaluated and a reference video signal (RI) which is a signal before deterioration of the deteriorated video signal; and a subjective quality estimation unit (14) for weighting the temporal/spatial characteristic amount (PC) according to the relationship between the pre-acquired deteriorated vide and the user subjective evaluation value, thereby estimating the subjective quality Y of the deteriorated video signal (PI). Thus, it is possible to estimate a video subjective quality even when deterioration is caused locally in the temporal/spatial direction in the video.

L~invention concerne un dispositif d~évaluation objective de qualité de vidéo comprenant : une unité de dérivation de caractéristique temporelle/spatiale (12) pour dériver une quantité de caractéristique temporelle/spatiale (PC) qui est une caractéristique de détérioration générée dans un signal vidéo détérioré (PI) à évaluer et un signal vidéo de référence (RI) qui est un signal avant détérioration du signal vidéo détérioré ; et une unité d~estimation de qualité subjective (14) pour pondérer la quantité de caractéristique temporelle/spatiale (PC) en fonction de la relation entre la vidéo détériorée pré-acquise et la valeur d~évaluation subjective d~utilisateur, estimant ainsi la qualité subjective Y du signal vidéo détérioré (PI). Ainsi, il est possible d~estimer la qualité subjective de vidéo même lorsque la détérioration est causée localement en direction temporelle/spatiale dans la vidéo.

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