Transmission method, reception method, transmitter, and receiver

A transmission apparatus comprising:

• a processor that, in operation, performs:
• performing BCH (Bose-Chaudhuri-Hocquenghem) encoding on an information bit sequence to generate a first encoded bit sequence;
• inserting padding bits into the first encoded bit sequence to generate a padded bit sequence;
• performing LDPC (Low-Density Parity-Check) encoding on the padded bit sequence to generate a second encoded bit sequence;
• interleaving the second encoded bit sequence to generate an interleaved bit sequence;
• and
• removing the padding bits from the interleaved bit sequence to generate a removed bit sequence;
• and
• a transmitter that, in operation, transmits the removed bit sequence, wherein
• the padded bit sequence includes a first padding bit and a second padding bit separated by one or more bits of the information bit sequence.