SMPTE 334M defines a mapping of data in vertical ancillary data packets. In particular, it refers to a packet named program description which is identified by the following combination of data identifier (DID) and secondary data identifier (SDID): $${
m DID}=162_{
m h}qquad {
m SDID}=101_{
m h}$$ — This packet carries data which define characteristics of the video and audio program material. ...