For example, the embedder chooses or selects the block of bits associated with the syntax value that decreases the mean luminance in the corresponding block if the payload bit is a ‘0’ and choose the block of bits associated with {HEAD ~ the syntax value} that increases {TAIL ~ the mean luminance} in the corresponding block if the payload bit is a ‘1’ 
increases
For example , the embedder chooses or selects the block of bits associated with the syntax value that decreases the mean luminance in the corresponding block if the payload bit is a ‘ 0 ’ and choose the block of bits associated with { HEAD ~ the syntax value } that increases { TAIL ~ the mean luminance } in the corresponding block if the payload bit is a ‘ 1 ’
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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 HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH