[announcement_support_descriptor.Type]
Bits = 4
0 = Emergency alarm
1 = Road Traffic flash
2 = Public Transport flash
3 = Warning message
4 = News flash
5 = Weather flash
6 = Event announcement
7 = Personal call

[announcement_support_descriptor.ReferenceType]
Bits = 3
0 = In usual audio stream of the service
1 = In separate audio stream in the service
2 = In a different service within the same transport stream
3 = in a different service within a different transport stream
