[ISDB_network_identifier_descriptor.media_type]
# table in ARIB STD-B21, 9.1.8.3
Bits = 16
0x4142 = Advanced BS
0x4143 = Advanced wide-band CS
0x4253 = BS/broadband CS
0x4353 = Narrow-band CS / Advanced narrow-band CS
0x5442 = Terrestrial broadcasting
