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vertical blanking interval
(redirected from Vertical interval)

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia, Hutchinson 0.03 sec.

vertical blanking interval

The part of a TV signal that is sent between each video frame. In North American TV (NTSC), the vertical blanking interval (VBI) takes up the last 45 lines of each 525-line frame. Its purpose is to allow the TV time to reposition its electron beam from the bottom of the current frame (screen) to the top of the next one. This non-viewable part of the signal is used to transmit closed-caption content. See datacasting, V-chip and ATV Forum.



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Lieutenant Najeebalah plotted the priority target on his POU-9Y plotting board and determined the range, vertical interval and the angle of displacement of the distant aiming point (DAP) and radioed the fire mission for the Russian D-30 to SFC Mirwis.
LKA also believes that this extension of the vein structure(s) at 6 Level should increase potential reserves located in the 1,050' vertical interval between the valley floor and the current workings.
The FDO must identify the appropriate vertical interval (VI) based on these conditions.
 
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