As the bit sequence is detected from {TAIL ~ the read signal} with {HEAD ~ each}, new sample period, it is shifted into a shift register 
As the bit sequence is detected from { TAIL ~ the read signal } with { HEAD ~ each } , new sample period , it is shifted into a shift register
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH