Patent ID: 8514963

Claim:
A data transmission device comprising: an error correction encoding unit for carrying out error correction encoding of data which is a transmission object to create a codeword; a modulation unit for modulating the codeword created by said error correction encoding means; and a codeword transmitting unit for dividing the codeword modulated by said modulation unit into a plurality of codewords, and for simultaneously transmitting the plurality of codewords into which the codeword is divided by using a plurality of antennas, wherein when a data reception device fails in error correction decoding of the codewords, said codeword transmitting unit deforms the transmitted codewords according to a predetermined rule and transmits said deformed codewords, and when the data reception device fails in the error correction decoding of the codewords, said codeword transmitting unit transmits additional parity information if a coding rate in the error correction encoding unit is the higher of a first coding rate and a second coding rate, or deforms the transmitted codewords according to the predetermined rule and transmits said deformed codewords if the coding rate in the error correction encoding unit is the lower of said first coding rate and said second coding rate.