Sync Suppression |
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Sync Suppression is easily identified by the "wavy bar" that
wiggles through the picture. This bar is actually the horizontal blanking interval. A close look at the bar, will show 4 bands
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Video Inversion |
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Video Inversion involves more than just inverting all the video
information. The active video (the stuff that lies between the two sync intervals) is all that gets inverted. The sync and color information remain at their proper polarity. This causes the color burst to be phase shifted 180 degrees, in respect to the chroma. The end result is a negative image (dark = light) with a color shift (ie: yellow = blue). This method is usually coupled with sync suppression. |
SSAVI Suppression |
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The SSAVI system is easily identified by the "dotted" line that
appears near the top of the screen. These "dots" are actually the authorization data contained on lines 10-13 of the vertical interval. |