function category=detableDC(basecode)
if strcmp(basecode,'00')==1
category=0;
elseif strcmp(basecode,'010')==1
category=1;
elseif strcmp(basecode,'011')==1
category=2;
elseif strcmp(basecode,'100')==1
category=3;
elseif strcmp(basecode,'101')==1
category=4;
elseif strcmp(basecode,'110')==1
category=5;
elseif strcmp(basecode,'1110')==1
category=6;
elseif strcmp(basecode,'11110')==1
category=7;
elseif strcmp(basecode,'111110')==1
category=8;
elseif strcmp(basecode,'1111110')==1
category=9;
elseif strcmp(basecode,'11111110')==1
category=10;
elseif strcmp(basecode,'111111110')==1
category=11;
end