hierarchy_type [MPEG-2 Semantics]
hierarchy_type is a 4-bit unsigned integer field that signals the hierarchical relation between the associated hierarchy layer and and it's hierarchy embedded layer.
valid hierarchy_type values
| value | description |
| 1 / 0x01 | ISO/IEC 13818-2 (MPEG-2) Spatial Scalability |
| 2 / 0x02 | ISO/IEC 13818-2 (MPEG-2) SNR Spatial Scalability |
| 3 / 0x03 | ISO/IEC 13818-2 (MPEG-2) Temporal Scalability |
| 4 / 0x04 | ISO/IEC 13818-2 (MPEG-2) Data partitioning |
| 5 / 0x05 | ISO/IEC 13818-3 (MPEG-2) Extension bitstream |
| 6 / 0x06 | ISO/IEC 13818-1 (MPEG-2) Private Stream |
| 15 / 0x0F | Base layer |
See: Hierarchy Descriptor
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