function the_output1=cnv_encd(mybit)
g=[1 1 1 0 1 1 1 1 0 0 0 1 1 1];
n=length(mybit);
juzhen=zeros(n,(n-1)*2+14);                %多余個(gè)數(shù)＝2*約束長度-2=2*移位寄存器個(gè)數(shù)
for i=1:n
    juzhen(i,(i-1)*2+1:(i-1)*2+14)=g;
end
the_output=mybit*juzhen;
the_output=mod(the_output,2);
the_output1=the_output;
the_output2=the_output(1,1:n*2);