Teletext decoder having a register array for operating on pixel words
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United States of America Patent
Stats
-
Jun 17, 1986
Grant Date -
N/A
app pub date -
Nov 29, 1983
filing date -
Nov 29, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A teletext decoder extracts digital information from a video signal for displaying graphics and textual information embedded in the video signal. The decoder includes a prefix processor responding to user supplied commands for selecting and storing the pertinent embedded information into a memory. The microcomputer reads the data provided by the prefix processor, converts it to pixel words representing picture elements and restores the converted data into the memory. The decoder includes a display processor which reads more than one pixel word at a time when accessing the memory, and translates each pixel word to 3 groups of color codes and to a one-bit transparency code.
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