Television broadcasting apparatus including monochromatic characters with a colored contour
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 3, 1992
Grant Date -
N/A
app pub date -
Jan 24, 1991
filing date -
Jan 30, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for transmitting an NTSC color signal superposed with a signal corresponding to monochromatic characters with a colored contour, which is obtained from a color character super device, comprises a first circuit responsive the NTSC signal from the color character super device to determine an area on a television receiver screen on which signal out of NTSC signal standard may be displayed, a second circuit for deriving chrominance signal spectrum out of NTSC standard and means for gating the chrominance signal spectrum with an output of the first circuit and then for subtracting the gated chrominance signal spectrum from the NTSC signal to thereby at least reduce signal component thereof out of the NTSC standard signal.
First Claim
Family
International Classification(s)
Cited Art Landscape
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