Patent ID: 7917833

Claim:
A communication apparatus that comprises a transmitting unit and a receiving unit each of which has an error correction function, and transmits and receives respectively a information frame sufficiently longer than a codeword, wherein the transmitting unit includes a first interleaver that rearranges positions of bits in an information frame based on a predetermined rule; an error correction encoder that carries out an error correction encoding to the information frame whose bit positions have been rearranged; and a transmission signal generator that inserts error correction parities obtained by the encoding operation using the first interleaved information frame into predetermined positions of the information frame, thereby generating a transmission signal, and the receiving unit includes a reception signal extractor that receives the transmission signal and extracts a part corresponding to the information frame and the other part corresponding to the error correction parities, from the thus received transmission signal; a second interleaver that rearranges positions of the bits in the information frame part based on the same rule as that of the first interleaver; a decoder that corrects an error of bits rearranged by the second interleaver, based on the error correction parity part; and a de-interleaver that reproduces an information frame by returning positions of the error-corrected bits to the original bit positions.