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hierarchy_descriptor (MPEG-2)

To describe the relationship between heirarchical video and audio streams, the MPEG-2 hierarchy_descriptor can be used.

descriptor syntax
syntax	bit index	# of bits	mnemonic
descriptor_tag	0	8	uimsbf
descriptor_length	8	8	bslbf
reserved	16	4	'1111'
hierarchy_type	20	4	uimsbf
reserved	24	2	'11'
hierarchy_layer_index	26	6	uimsbf
reserved	32	2	'11'
hierarchy_embedded_layer	34	6	bslbf
reserved	40	2	'11'
hierarchy_channel	42	6	bslbf
legend
Note: bit index is only indicated for the first time through the descriptor.

See: MPEG-2 descriptors