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DATA PROCESSING APPARATUS AND METHOD

  • US 20160204804A1
  • Filed: 08/31/2015
  • Published: 07/14/2016
  • Est. Priority Date: 01/13/2015
  • Status: Abandoned Application
First Claim
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1. A data processing apparatus comprising:

  • a group-wise interleaving unit that performs group-wise interleaving which interleaves an LDPC code having a code length (N) of 16,200 bits or 64,800 bits for every bit group of 360 bits; and

    a block interleaving unit that performs block interleaving in such a manner that an LDPC code obtained by performing the group-wise interleaving is written in m number of columns as storage regions arranged in the row direction, m bits are obtained by respectively reading the LDPC code from m number of columns bit by bit, and the m bits are interleaved into one symbol corresponding to any one of 2m number of signal points defined by a modulation scheme,wherein a type of the block interleaving includes a type A in which the writing of an LDPC code obtained by performing the group-wise interleaving in the column direction of the columns is iteratively performed on m number of columns, and a type B in which the writing of an LDPC code obtained by performing the group-wise interleaving in the row direction of m number of columns for every bit group is iteratively performed,wherein a MODCOD which is a combination of the LDPC code and the modulation scheme includes a MODCOD-A which is a MODCOD based on the assumption that the block interleaving of the type A is performed, and a MDOCOD-B which is a MDOCOD based on the assumption that the block interleaving of the type B is performed, andwherein when the block interleaving of the type A is performed on the LDPC code of the MODCOD-B, the group-wise interleaving unit performs the group-wise interleaving on the LDPC code of the MODCOD-B such that the same block interleaving result as the block interleaving result obtained when the block interleaving of the type B is performed is obtained, orwhen the block interleaving of the type B is performed on the LDPC code of the MODCOD-A, the group-wise interleaving unit performs the group-wise interleaving on the LDPC code of the MDOCOD-A such that the same block interleaving result as the block interleaving result obtained when the block interleaving of the type A is performed is obtained.

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