Method and apparatus for selectively unblanking special...

Details Method and apparatus for selectively unblanking special... Method and apparatus for selectively unblanking special...

H - Electricity

04

N

350/84

H04N 5/10 (2006.01)

Patent

CA 1265235

AV-3220 C1 Abstract of the Disclosure A method and apparatus for producing a video composite blanking signal which provides for selectively unblanking lines of video information which wouldnormally be blanked according to a predetermined television standard. Each line in a frame of video data is assigned a line type based on its location in the sequence of lines of video information. Those lines that are in the vertical blanking period are assigned a different line type than those which are not. In response to unblanking selection data, line types of lines which are normally blanked are selectively modified to the line types of those lines which are not normally modified. The vertical interval blanking signal is produced only for those line types for line in the vertical blanking period.

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