| 摘要 |
PROBLEM TO BE SOLVED: To restrain deterioration in the decoding performance of an LDPC code, and to miniaturize a decoder. SOLUTION: A quasi-check node calculator 412 performs a check node arithmetic operation of a check node for decoding the LDPC code, and one portion of a variable node arithmetic operation of a variable node for decoding the LDPC code as a quasi-check node arithmetic operation. A quasi-variable node calculator 415 performs another portion of the variable node arithmetic operation as quasi-variable node arithmetic operation. In integration performed by the quasi-variable node arithmetic operation, an integral result is outputted which is expressed by the quantization value of the number of bits that is larger than that to be integrated by 1 bit. The quasi-check node calculator 412 can be applied to, for example, a decoder, or the like that is built in a tuner for receiving satellite broadcasting for decoding the LDPC code. COPYRIGHT: (C)2007,JPO&INPIT
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