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