ST 2020-2:2008 : Vertical Ancillary Data Mapping of Audio Metadata — Method A
The Society of Motion Picture and Television Engineers eBooks · 2008
This standard defines one of two methods for mapping the serial audio metadata stream related to encoded audio bitstreams into the 10-bit vertical ancillary (VANC) data space of a standard definition or high definition digital component television signal in accordance with SMPTE 291M. This VANC mapping conveys the audio metadata elements and carries information about the location of the embedded audio with which the metadata is associated. — An associated standard 2020–1 defines the DID and SDID values assigned to the VANC packets carrying this metadata, the location where packets are to be located, the basic structure of the metadata, and the asynchronous serial data transport which is used to convey the metadata from device to device (when not embedded in a video signal). — Note: An associated standard 2020–3 defines an alternate method of mapping the metadata into ancillary data packets.