abstract:The vertical blanking interval (VBI), also known as the vertical interval or VBLANK, is the time difference between the last line of one frame or field of a raster display, and the beginning of the first line of the next frame. It is present in analog television, VGA, DVI and other signals.
Applied Micro Technology uses the verticalblankinginterval to allow Internet data to piggyback on a television broadcast at up to five times the speed of a standard modem and telephone line.