Data processing device and data processing method

摘要

Data processing devices and data process methods that can increase tolerance for data errors. An LDPC encoder performs encoding with an LDPC code having the code length of 16200 bits and one of the six code rates of 1/5, 1/3, 2/5, 4/9, 3/5, and 2/3. The parity check matrix H of the LDPC code is formed by arranging the elements “1” of an information matrix in the column direction in 360-column cycles, the information matrix corresponding to the information length of the parity check matrix H, the information length corresponding to the code length and the code rate, the information matrix being defined by a check matrix initial value table that shows the positions of the elements “1” of the information matrix at intervals of 360 columns. The check matrix initial value table is designed for digital broadcasting intended for portable terminals, for example. The present invention can be applied to cases where LDPC encoding and LDPC decoding are performed.

主权项

1. A data processing device comprising
processing circuitry configured to perform encoding with an LDPC (Low Density Parity Check) code having a code length of 16200 bits and a code rate of 1/5, wherein a parity check matrix of the LDPC code is formed by arranging elements “1” of an information matrix in a column direction in 360-column cycles, the information matrix being defined by a check matrix initial value table showing positions of the elements “1” of the information matrix at intervals of 360 columns, the information matrix corresponding to an information length of the parity check matrix, the information length corresponding to the code length and the code rate, the check matrix initial value table being formed with:188 518 775 1694 1820 3394 3986 4140 4224 5236 57836313 6371 6792 7067 7084 7173 7445 7549 7973 9043 92199942 10111 10258 10300 10353 10707 10769 10796 1107911661 12025 12042 12702 128387 25 392 557 625 838 1377 2223 2396 3058 3335 33483363 3918 4040 4128 4899 5189 5474 5838 6040 6124 77778220 8783 9299 9785 10924 11083 11902 12381 12513 1275812834 12871 1295076 4691 7180 7325 112926454 8048 12058 129463953 4932 10808 127004605 9117 9921 106622984 8202 10670 128774357 6205 7370 104035559 9847 10911 11147.