VANC

Within the standards established by SMPTE for digital video, there exists data corresponding to the vertical blanking interval that is unused for video. The standards allow using this Vertical Ancillary data (VANC) for any desired purpose, although industry-standard video servers and digital VTRs have only limited ability to record it. Within Standard Definition video, more than 300,000 Kb/sec can be contained in each line. With High Definition video, this amount increases to more than 900,000 Kb/sec. The VANC data is one candidate for ATVEF Transport B data.