==== STC_reference_descriptor

Defined by ARIB in <<ARIB-B10J>>.

[source,xml]
----
<STC_reference_descriptor
    STC_reference_mode="uint4, required"
    external_event_id="uint16, optional"
    external_service_id="uint16, optional"
    external_network_id="uint16, optional"
    NPT_reference="uint33, optional"
    STC_reference="uint33, optional"
    time_reference="hh:mm:ss, optional"
    time_reference_extension="mmm, optional">

  <reserved_data>
    Hexadecimal content
  </reserved_data>

</STC_reference_descriptor>
----
