DATA PROCESSING APPARATUS AND METHOD

• US 20160204804A1
• Filed: 08/31/2015
• Published: 07/14/2016
• Est. Priority Date: 01/13/2015
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Michael, Lachian, IKEGAYA, Ryoji, Yamamoto, Makiko, Loghin, Muhammad Nabil Sven, Shinohara, Yuji
• Application Number:
  US14/840,888
• Publication Number:
  US 20160204804A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H03M 13/036 Heuristic code construction methods, i.e. code construction or code search based on using trial-and-error
• CPC Class Codes: H03M 13/1165 QC-LDPC codes as defined for the digital video broadcasting [DVB] specifications, e.g. DVB-Satellite [DVB-S2]
• CPC Class Codes: H03M 13/152 Bose-Chaudhuri-Hocquenghem [BCH] codes
• CPC Class Codes: H03M 13/253 with concatenated codes
• CPC Class Codes: H03M 13/255 with Low Density Parity Check [LDPC] codes
• CPC Class Codes: H03M 13/2707 Simple row-column interleaver, i.e. pure block interleaving
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• CPC Class Codes: H03M 13/2778 Interleaver using block-wise interleaving, e.g. the interleaving matrix is sub-divided into sub-matrices and the permutation is performed in blocks of sub-matrices
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence

Abstract

A data processing apparatus includes a group-wise interleaving unit that performs group-wise interleaving; 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. A type of the block interleaving includes a type A and a type B. 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.

Claims

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 2^m 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, and

wherein 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, or

when 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.

2. A data processing method comprising:

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

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 2^m 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, and

wherein when the block interleaving of the type A is performed on the LDPC code of the MODCOD-B, in the group-wise interleaving, the group-wise interleaving is performed 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, or

when the block interleaving of the type B is performed on the LDPC code of the MODCOD-A, in the group-wise interleaving, the group-wise interleaving is performed 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.

3. A data processing apparatus comprising:

a block deinterleaving unit that performs block deinterleaving which returns m bits of a symbol obtained from data transmitted from a transmission apparatus to an LDPC code obtained by performing group-wise interleaving; and

a group-wise deinterleaving unit that performs group-wise deinterleaving which returns the arrangement of the LDPC code obtained by performing the group-wise interleaving on the original arrangement,

wherein the transmission apparatus includes

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 2^m 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, and

wherein 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, or

when 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.

4. A data processing method comprising:

block deinterleaving which returns m bits of a symbol obtained from data transmitted from a transmission apparatus to an LDPC code obtained by performing group-wise interleaving; and

group-wise deinterleaving which returns the arrangement of the LDPC code obtained by performing the group-wise interleaving on the original arrangement,

wherein the transmission apparatus includes

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 2^m 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, and

wherein 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, or

when 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.