Video signal monitoring apparatus and method

H - Electricity – 04 – N

Patent

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H04N 17/02 (2006.01)

Patent

CA 2670024

A video signal monitoring device includes: means (11) for inputting a video signal (X(video), Y(video), Z(video)) having, X, Y, and Z components; means (13) for calculating a position (x(video), y(video)) having x and y components on the xy chromaticity diagram from the video signal according to a predetermined conversion expression; and means (14) for indicating the position (59). The means (14) can display triangles (57, 58) connecting three xy corresponding to R, G, and B components belonging to a predetermined color reference system, a range (56) on the xy chromaticity diagram which a human can view, and/or a maker (60) of a range of the xvYCC display system. The means (14) can indicate whether the video signal color ((x(video), y(video)) is out of a predetermined range (51-54). The xy chromaticity diagram may be modified, for example, to a UCS chromaticity diagram.

La présente invention concerne un dispositif de surveillance qui comprend : un moyen (11) pour entrer un signal vidéo (X(video), Y(video), Z(video)) ayant X, Y et Z composants, un moyen (13) pour calculer une position (x(video), y(video)) ayant x et y composants sur le diagramme de chromaticité xy du signal vidéo en fonction d'une expression de conversion prédéterminée, ainsi qu'un moyen (14) pour indiquer la position (59). Le moyen (14) peut afficher des triangles (57, 58) reliant trois xy correspondant aux composants R, G et B appartenant à un système de référence de couleur prédéterminé, un intervalle (56) sur le diagramme de chromaticité xy qu'un humain peut voir ou un fabricant (60) d'un intervalle du système d'affichage xvYCC. Le moyen (14) peut indiquer si la couleur du signal vidéo ((x(video), y(video)) sort d'un intervalle prédéterminé (51-54). Le diagramme de chromaticité xy peut être modifié, par exemple, sur un diagramme de chromaticité UCS.

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