parchk

Adds an overall parity check bit to the input Code.

Adds an overall parity check bit to the input code C1.The output code C2 is the extended code.C1 must be a binary fixed length block code.

For example if C1=[1 0 0 1 ; 1 1 1 0] then
C2=parchk(C1),returns C2=[1 0 0 1 0 ; 1 1 1 0 1].