<?xml version="1.0" encoding="UTF-8"?>
<tsduck>
  <_descriptors>

    <HEVC_subregion_descriptor
        SubstreamIDsPerLine="uint7, required"
        TotalSubstreamIDs="uint8, required"
        LevelFullPanorama="uint8, required">

      <SubregionLayout
          PreambleSubstreamID="uint7, optional"
          Level="uint8, required"
          PictureSizeHor="uint16, required"
          PictureSizeVer="uint16, required">

        <Pattern>
          <Substream offset="int8, required"/>
        </Pattern>

      </SubregionLayout>

    </HEVC_subregion_descriptor>

  </_descriptors>
</tsduck>
