In step 930, the recovery stage recovers {TAIL ~ a first set} of {HEAD ~ narrowband signals} wL using the sampled signals ym produced by the conversion stage 
In step 930 , the recovery stage recovers { TAIL ~ a first set } of { HEAD ~ narrowband signals } wL using the sampled signals ym produced by the conversion stage
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH