Patent ID: 8824581

Claim:
A data transmission apparatus comprising: a plurality of transmission paths that each transmit data one bit at a time; a plurality of transmission data generation units that each generate a first symbol by attaching one control bit to data of a predetermined bit length or to control data of the predetermined bit length, or a second symbol of a bit length longer than the predetermined bit length by one bit, wherein the data of the predetermined bit length is included in transmission target data, the control data is used for performing an adjustment for the transmission paths, and the second symbol is data included in the transmission target data; and a plurality of transmission units that each transmit in a period the first symbol or the second symbol generated by the respective transmission data generation units, to a facing apparatus via the respective transmission paths of the transmission data generation units, the transmission target data being transmitted in the period, wherein the plurality of transmission data generation units each switch between generating the first symbol and generating the second symbol for each of the period, and, in the period at least one transmission data generation unit generates the first symbol and at least another transmission data generation unit generates the second symbol.