Transmission apparatus and associated method of encoding transmission data

A transmission apparatus comprising:

• an encoder that codes a data sequence with a parity check matrix, wherein the data sequence includes a final information bit sequence and virtual information bits, and outputs the final information bit sequence and a parity sequence, as low-density parity-check (LDPC) codes;
• and
• a transmitter that transmits the LDPC codes as a transmission data;
• wherein
• “n” number (where n is an integer equal to or greater than 1) of parity check equation groups including a plurality of parity check polynomials are arranged in the parity check matrix,
• each of the parity check polynomials satisfies zero,
• a column length of the parity check matrix is longer than a total length of the final information bit sequence and the parity sequence, by a length of the virtual information bits that are set to “0” and are not transmitted,
• the total length of the final information bit sequence and the parity sequence has a sequence length corresponding to a length from a first column to a predetermined column of the parity check matrix, and
• the encoder generates the LDPC codes by using the first column to the predetermined column among one or more column(s) of the parity check matrix.