Device and method for transmitting a communication / broadcast system and receive data

An apparatus and method for a communication / broadcast system to perform shortening and puncturing in the case where the parity test matrix to perform encoding and decoding. The method includes determining a number of zero padding bits, determining in which all bits are zero padded NPAD bit group number, a bit pattern of all zeros filled in the 0th to (Npad-1) based on the shortened bit group, and zero padding bits comprising the information bits are encoded to produce a codeword. Here, the shortening pattern defined in 9,8,15,10,0,12,5,27,6,7,19,22,1,16,26,20,21,18,11,3,17, 24,2,23,25,14,28,4,13 and sequences of bit groups 29 is defined.