In encoding mode, {HEAD ~ VPU} receives {TAIL ~ digitized video input} and compresses according to MPEG standard 
receives
In encoding mode , { HEAD ~ VPU } receives { TAIL ~ digitized video input } and compresses according to MPEG standard
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH