| 摘要 |
According to one embodiment, an encoding apparatus includes an encoding unit. The encoding unit encodes a data bit sequence to generate a codeword corresponding to a parity check matrix. The parity check matrix is based on a protograph. In the protograph, each of n check nodes of a first type is connected to n variable nodes of a first type by a total of at least one edge of a first type, and to n variable nodes of a second type by a total of at least two edges of a second type. In the protograph, each of n check nodes of a second type is connected to the n variable nodes of the second type by a total of r edges of a third type, and to n variable nodes of a third type by a total of g edges of a fourth type.
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