Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-09-14
1992-06-16
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 22, H04N 1702
Patent
active
051228637
ABSTRACT:
A test apparatus for video signal produces a two dimensional projection of a three dimensional display of video variables. The variables can be luminance, saturation and hue; luminance, R-Y and B-Y color difference; red, blue and green amplitude; or luminance, I and Q, for example. The variables can be displayed with the R-Y and B-Y color differences on X and Y axes in a plane, with luminance on a Z axis perpendicular to the plane. The display is rotated for ease of viewing of the projection, and is preferably rotatable under operator control, in at least one axis of rotation. The axis of rotation can be in the plane of X and Y. A graticle which represents reference points in a standard vectorscope display can be superimposed on the projection. Points representing the saturation and hue phase angle of colors of a standard color bar test pattern, and graticle lines parallel to the Z axis, can also be included.
REFERENCES:
patent: 3614304 (1971-10-01), Schonfelder
patent: 4488168 (1984-12-01), Mino
patent: 4707727 (1987-11-01), Penney
patent: 4754269 (1988-06-01), Kishi et al.
Groody James J.
Videotek, Inc.
Vu Kim Yen
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