Patent ID: 8209581

Claim:
A receiving apparatus configured to receive, if a data signal LDPC (Low Density Parity Check)-coded by use of a predetermined parity check matrix for defining an LDPC code and a transmission control signal LDPC-coded by use of a parity check matrix that is one of states of being the same as said predetermined parity check matrix or different from said predetermined parity check matrix come as multiplexed, both of said data signal and said transmission control signal and decode said received data signal and said received transmission control signal, comprising: an LDPC decoder configured to decode both of said data signal and said transmission control signal; a data signal input buffer arranged before said LDPC decoder and configured to hold said received data signal and a transmission control signal input buffer arranged before said LDPC decoder and configured to hold said received transmission control signal; and a controller configured to select one of said data signal held in said data signal input buffer and said transmission control signal held in said transmission control signal input buffer as a signal subject to decoding and transmit the selected signal to said LDPC decoder to make said LDPC decoder decode said signal subject to decoding, wherein said LDPC decoder determines that the decoding has failed if a sequence obtained by decoding said transmission control signal is a value that is not used in a system where said transmission control signal is transmitted.