Patent ID: 8543897

Claim:
A transmission apparatus comprising: a first parity calculation controller to calculate parity in units of frame and insert a calculation result into a next frame with respect to a first frame sequence; and a second parity calculation controller to calculate parity in units of frame and insert a calculation result into a next frame with respect to a second frame sequence, wherein the second parity calculation controller receives from the first parity calculation controller first parity data which is a calculation result in which the parity is calculated by the first parity calculation controller, and which has a same value as that of a parity calculation result to be inserted into a target frame for parity calculation in the second frame sequence, and calculates the parity of the target frame including the first parity data and second parity data which is a result in which the parity of a previous frame positioned one frame before the target frame in the second frame sequence is calculated and matches one parity data in the first frame sequence with another parity data in the second frame sequence.