Method and apparatus for attenuating or eliminating at least a portion of color burst modifications to a video signal
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United States of America Patent
Stats
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Jun 19, 2012
Grant Date -
Jan 6, 2011
app pub date -
Aug 23, 2010
filing date -
May 9, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A copy protection color stripe process is defeated first by determining the location of the video lines including the color stripe process. Then some or all of the lines including the modified color bursts are modified so as to render the overall video signal recordable. The modification is accomplished in a number of ways, including phase shifting the color stripe burst into the correct phase, replacing, attenuating and or eliminating some of the color stripe bursts or at least a portion of particular color burst envelopes so that they are no longer effective, mixing the color stripe burst with color stripe signals of the correct phase so as to eliminate most or all of the phase error present or modifying the horizontal sync pulse signals immediately preceding the modified color bursts so that the modified color bursts are not detected by a VCR and hence have no effect.
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