An LR combination unit combines the motion vectors of {HEAD ~ the left and right image signals} to output {TAIL ~ the combined motion vectors} as a motion vector 
to output
An LR combination unit combines the motion vectors of { HEAD ~ the left and right image signals } to output { TAIL ~ the combined motion vectors } as a motion vector
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH