Converter to convert a computer graphics signal to an interlaced video signal
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United States of America Patent
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-
Oct 3, 1995
Grant Date -
N/A
app pub date -
Sep 16, 1993
filing date -
Sep 16, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A converter receives a computer graphics signal from a PC and provides from it a video signal for display or recording. Analogue RGB signals are digitised and applied to a vertical filter and rate buffer. The rate buffer needs only one to three lines of storage capacity. The received graphics signal is a VGA 640.times.480 non-interlaced mode signal, and the rate buffer halves the line rate and produces an interlaced output. Such a signal can be treated as a video signal, after reconversion to analogue form. The vertical filter provides a degree of vertical averaging to remove flicker. In a preferred store using three line-store FIFOs, input lines are applied to them in the sequence A,B,C,B,A, and so on.
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Cited Art Landscape
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