modifying the loop filter output samples of each of {TAIL ~ the N channels} with the modification signal to generate modified loop filter output samples for each of {HEAD ~ the N channels} 
modifying the loop filter output samples of each of { TAIL ~ the N channels } with the modification signal to generate modified loop filter output samples for each of { HEAD ~ the N channels }
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD