Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1988-01-11
1989-03-28
Chin, Tommy P.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358139, H04N 1700
Patent
active
048168971
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.
REFERENCES:
patent: 4635094 (1987-01-01), Thong
patent: 4740841 (1988-04-01), Slavin
1980 Option 04-Section 3, Group 21, "Group 21 Chominance-To-Luminance Delay and Gain", (NTC Report No. 7), pp 3-63 to 3-66.
Chin Tommy P.
Gray Francis I.
Sony-Tektronix, Inc.
Tektronix Inc.
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