Video quality measurement

H - Electricity – 04 – N

Patent

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Details

H04N 7/50 (2006.01) H04N 7/26 (2006.01) H04N 17/02 (2006.01)

Patent

CA 2632403

This application is concerned with a non-intrusive video quality measurement method, in particular where the video signal having: an original form; encoded form in which video signal has been encoded using a compression algorithm utilising a variable quantiser step size such that the encoded signal includes a quantiser step size parameter; and, a decoded form in which the encoded video signal has been at least in part reconverted to the original form. The method comprises the steps of : a) generating a first quality measure which is a function of said quantiser step size parameter; b) generating a second quality measure which is a function of the spatial complexity of the frames represented by the video signal in the decoded form; and, c) combining the first and second measures in order to obtain an estimate for the subjective visual quality of the decoded video.

L'invention porte sur un procédé de mesure de la qualité d'une vidéo, en particulier lorsque le signal vidéo présente: une forme originale; une forme codée dans laquelle: le signal a été codé à l'aide d'un algorithme de compression utilisant une taille variable d'étape de quantifieur de manière à ce que le signal codé comporte un paramètre de taille variable d'étape de quantifieur; et une forme décodée dans laquelle: le signal vidéo a au moins été en partie reconverti dans sa forme originale. Le procédé comporte les étapes suivantes: a) exécution d'une première mesure de qualité fonction du susdit paramètre; b) exécution d'une deuxième mesure de qualité fonction de la complexité spatiale des trames représentées par le signal vidéo sous sa forme décodée; et c) combinaison de la première et de la deuxième mesure.

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