The example shown in FIG 12 shows that a receiving device 5 a is receiving picture data which are outputted from {TAIL ~ a camera} 101 a and are transmitted by {HEAD ~ the distribution device} 1 
The example shown in FIG 12 shows that a receiving device 5 a is receiving picture data which are outputted from { TAIL ~ a camera } 101 a and are transmitted by { HEAD ~ the distribution device } 1
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH