Test signals and test signal generators for use with PAL plus te

Details Test signals and test signal generators for use with PAL plus te Test signals and test signal generators for use with PAL plus te

1996-05-31

1998-11-24

Flynn, Nathan J.

Television

Monitoring, testing, or measuring

Test signal generator

348189, H04N 1700

Patent

active

058412514

ABSTRACT:
A test pattern is suitable for a television signal decoder which detects changes in the color content of a signal from frame to frame, and on the basis of these changes attenuates high frequency luminance components, and possibly switches its output between intra-frame averaged chrominance and high-frequency luminance signals and directly-derived signals. The test pattern has discrete areas within which a motion value representing the change in chrominance from frame to frame is constant, but different from the value in other areas. The areas also contain a high-frequency luminance component. Other areas have a hue which varies from field to field.

REFERENCES:
patent: 4625096 (1986-11-01), Morgan
patent: 5117483 (1992-05-01), Latshaw
patent: 5526057 (1996-06-01), Flannaghan

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