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Receiving VITS (vertical interval test signal)

Question asked by Sasa on Dec 13, 2010
Latest reply on Dec 20, 2010 by Sasa



It is necessary for me to receive VITS (vertical interval test signal) on video-decoder with HD (ADV7181C/7401/7403/7441A). VITS is transmitted in VBI lines (17, 18, 330, 331) CVBS and has range [-140…840mV]. If nominal level [0…700mV] is in codes [16…235], that VITS level [-140…840mV] will be in codes [-28…279]. This codes is impossible! How I can receive VITS and get their samples on pixel out port?


Note: SAA7113H (nxp) have mode “raw data (7)” with nominal level [0…700mV] -> [60…209] and VITS level [-140…840mV] -> [16…254] (only for line with VITS).