Data processing apparatus and data processing method

The present technology relates to an improved tolerance of a data processing apparatus and data processing method for the data errors. When the code length of 16200 bits of the LDPC code are mapped to 16 signal points, a demultiplexer exchange, such that when the 4 × 2 bits from the code bits of the most significant bit first (# i + 1) bits from a continuous and the 4 × 2 symbol bits of two-bit symbols of the most significant bit (# i + 1) bits, respectively, by a bit b # i and the bit y # i represents, for a code rate 7/15 LDPC code, b0 is allocated to y0, b1 is allocated to y2, b2 are allocated to y6, b3 is allocated to y3, b4 is allocated to y4, b5 is allocated to y1, b6 is allocated to y5, and b7 is allocated to y7. The present invention is applicable to, for example, a transmission system transmits the LDPC code and the like.