[DTVCC Layers] SMPTE 259M or H.222 or MXF [Comments] video frames split from link format [OSI Layers] 
Link
A p p l i c a t i o n
P r e s e n t a t i o n
S e s s i o n
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T r a n s p o r t
N e t w o r k
L i n k
P h y s i c a l