Responsive to detecting that {HEAD ~ the decoded audio frame} includes {TAIL ~ the distortion}, operations are performed on the decoded audio signal to conceal the distortion 
includes
Responsive to detecting that { HEAD ~ the decoded audio frame } includes { TAIL ~ the distortion } , operations are performed on the decoded audio signal to conceal the distortion
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH