Vanc

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VANC stands for Vertical Ancillary Data Space. This is part of the transmission signal for digital video that is not displayed on the screen as video frames. It is therefore available as a means of carrying other data.

It is described in the SMPTE specification SMPTE-334M "Vertical Ancillary Data Mapping for Bit-Serial Interface".

In the NTSC analog television system the Vertical blanking interval (or VBI) is similarly used to carry non-display data.


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