Method and system for low-subband content discrimination

Details Method and system for low-subband content discrimination Method and system for low-subband content discrimination

H - Electricity

04

N

H04N 7/50 (2006.01) H04N 5/917 (2006.01) H04N 7/64 (2006.01)

Patent

CA 2597227

A method and system are provided for discriminating areas of content from areas of noise in difference images of a digital video sequence. This allows the fewest bits possible to be used to encode areas of noise according to a video compression algorithm. The method comprises computing a difference frame from current image data and a reference frame; comparing at least one component of a candidate block within the difference frame to a threshold value to discriminate between content and noise; and encoding the candidate block if content is detected.

Procédé et système pour la discrimination entre des zones de contenu et des zones de bruit dans des images de différence de séquence vidéo numérique, permettant d'utiliser le moins de bits possibles pour coder les zones de bruit selon un algorithme de compression vidéo : calcul de trame de différence à partir de données d'image courantes et d'une trame de référence ; comparaison entre au moins une composante de bloc candidat dans la trame de différence et une valeur de seuil pour la discrimination contenu/bruit ; et codage du bloc candidat en cas de détection de contenu.

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