Chrominance to luminance delay and gain measurement display
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United States of America Patent
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Mar 28, 1989
Grant Date -
N/A
app pub date -
Jan 11, 1988
filing date -
Jan 11, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A chrominance to luminance gain and delay measurement display shows gain and delay inequalities due to differences between luminance and chrominance chanels of a video device as a point within a rectangular coordinate display system with respect to established tolerance limits. An appropriate test signal having bar and modulated pulse waveforms is selected from digitized video data stored in a field store acquisition memory. Luminance and chrominance arrays are derived from the modulated pulse waveform. The center points for each array are identified and displayed as a time difference between the center points along one axis of the display and as an amplitude ratio (chrominance/luminance) between the center points along an orthogonal axis of the display. The display includes a tolerance window so that an operator can readily observe whether the chrominance to luminance gain and delay is within established tolerances.
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