RGB display of a transcoded serial digital signal

Details RGB display of a transcoded serial digital signal RGB display of a transcoded serial digital signal

1993-04-12

1994-05-10

Powell, Mark R.

Television

Monitoring, testing, or measuring

H04N 1702

Patent

active

053112954

ABSTRACT:
An RGB display of a transcoded serial digital video signal is produced by converting the serial digital video signal to a parallel digital video signal, separating the digital luminance component signal and the two digital difference component signals from the parallel digital video signal, converting the digital luminance and color difference component signals into analog encoded color component signals, transcoding the analog encoded color component signals into RGB component signals, and routing the RGB component signals to a waveform display device. The RGB component signals also are routed to a gamut detection circuit where each component is compared with nominal plus and minus limit levels to determine if there is a gamut error. Color gamut for each RGB component signal may be determined visually from the display, either from the screen graticules or from voltage cursors, or may be determined automatically by varying the plus and minus limit levels from nominal levels for each RGB component signal which has a color gamut error until the gamut error is extinguished. The differences between the final limit levels and the nominal limit levels for each RGB component signal are a measure of the amount of gamut errors.

REFERENCES:
patent: 4707727 (1987-11-01), Penney
patent: 5122863 (1992-06-01), Zortea
patent: 5166791 (1992-11-01), Crawford

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