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