{TAIL ~ Implementations} may relate to various aspects of modifying, or using, a coded bitstream, or to recovering watermarking information from {HEAD ~ data} 
{ TAIL ~ Implementations } may relate to various aspects of modifying , or using , a coded bitstream , or to recovering watermarking information from { HEAD ~ data }
TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD