Data processing apparatus and data processing method

Abstract

The present technology relates to a data processing apparatus and a data processing method that are able to secure good communication quality in data transmission using an LDPC code. One symbol is mapped to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 7/15 as one symbol. 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle, and a radius ratio of the inner circle and the outer circle is 5.25. The present technology may be applied to, for example, a case of performing data transmission using an LDPC code.

1 - 24 . (canceled) 
     
     
         25 . A data processing apparatus comprising:
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 7/15; and   a mapping unit that maps a symbol to any one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 7/15 as one symbol,   wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle,   wherein a radius ratio of the inner circle and the outer circle is 3.32,   wherein the LDPC code includes an information bit and a parity bit,   wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit,   wherein the information matrix portion is represented by a parity check matrix initial value table, and   wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is   3 137 314 327 983 1597 2028 3043 3217 4109 6020 6178 6535 6560 7146 7180 7408 7790 7893 8123 8313 8526 8616 8638   356 1197 1208 1839 1903 2712 3088 3537 4091 4301 4919 5068 6025 6195 6324 6378 6686 6829 7558 7745 8042 8382 8587 8602   18 187 1115 1417 1463 2300 2328 3502 3805 4677 4827 5551 5968 6394 6412 6753 7169 7524 7695 7976 8069 8118 8522 8582   714 2713 2726 2964 3055 3220 3334 3459 5557 5765 5841 6290 6419 6573 6856 7786 7937 8156 8286 8327 8384 8448 8539 8559   3452 7935 8092 8623   56 1955 3000 8242   1809 4094 7991 8489   2220 6455 7849 8548   1006 2576 3247 6976   2177 6048 7795 8295   1413 2595 7446 8594   2101 3714 7541 8531   10 5961 7484   3144 4636 5282   5708 5875 8390   3322 5223 7975   197 4653 8283   598 5393 8624   906 7249 7542   1223 2148 8195   976 2001 5005.   
     
     
         26 . A data processing method comprising:
 a coding step of performing LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 7/15; and   a mapping step of mapping one symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 7/15 as one symbol,   wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle,   wherein a radius ratio of the inner circle and the outer circle is 3.32,   wherein the LDPC code includes an information bit and a parity bit,   wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit,   wherein the information matrix portion is represented by a parity check matrix initial value table, and   wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is   3 137 314 327 983 1597 2028 3043 3217 4109 6020 6178 6535 6560 7146 7180 7408 7790 7893 8123 8313 8526 8616 8638   356 1197 1208 1839 1903 2712 3088 3537 4091 4301 4919 5068 6025 6195 6324 6378 6686 6829 7558 7745 8042 8382 8587 8602   18 187 1115 1417 1463 2300 2328 3502 3805 4677 4827 5551 5968 6394 6412 6753 7169 7524 7695 7976 8069 8118 8522 8582   714 2713 2726 2964 3055 3220 3334 3459 5557 5765 5841 6290 6419 6573 6856 7786 7937 8156 8286 8327 8384 8448 8539 8559   3452 7935 8092 8623   56 1955 3000 8242   1809 4094 7991 8489   2220 6455 7849 8548   1006 2576 3247 6976   2177 6048 7795 8295   1413 2595 7446 8594   2101 3714 7541 8531   10 5961 7484   3144 4636 5282   5708 5875 8390   3322 5223 7975   197 4653 8283   598 5393 8624   906 7249 7542   1223 2148 8195   976 2001 5005.   
     
     
         27 . A data processing apparatus comprising:
 a demapping unit that demaps data transmitted from a transmission apparatus, based on signal points; and   a decoding unit that decodes the LDPC code obtained from data after the demapping,   wherein the transmission apparatus includes
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 7/15; and 
 a mapping unit that maps a symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 7/15 as one symbol, 
 wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle, 
 wherein a radius ratio of the inner circle and the outer circle is 3.32, 
 wherein the LDPC code includes an information bit and a parity bit, 
 wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit, 
 wherein the information matrix portion is represented by a parity check matrix initial value table, and 
 wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is 
   3 137 314 327 983 1597 2028 3043 3217 4109 6020 6178 6535 6560 7146 7180 7408 7790 7893 8123 8313 8526 8616 8638   356 1197 1208 1839 1903 2712 3088 3537 4091 4301 4919 5068 6025 6195 6324 6378 6686 6829 7558 7745 8042 8382 8587 8602   18 187 1115 1417 1463 2300 2328 3502 3805 4677 4827 5551 5968 6394 6412 6753 7169 7524 7695 7976 8069 8118 8522 8582   714 2713 2726 2964 3055 3220 3334 3459 5557 5765 5841 6290 6419 6573 6856 7786 7937 8156 8286 8327 8384 8448 8539 8559   3452 7935 8092 8623   56 1955 3000 8242   1809 4094 7991 8489   2220 6455 7849 8548   1006 2576 3247 6976   2177 6048 7795 8295   1413 2595 7446 8594   2101 3714 7541 8531   10 5961 7484   3144 4636 5282   5708 5875 8390   3322 5223 7975   197 4653 8283   598 5393 8624   906 7249 7542   1223 2148 8195   976 2001 5005.   
     
     
         28 . A data processing method comprising:
 a demapping step of demapping data transmitted from a transmission apparatus, based on signal points; and   a decoding step of decoding the LDPC code obtained from data after the demapping,   wherein the transmission apparatus includes
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 7/15; and 
 a mapping unit that maps a symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 7/15 as one symbol, 
 wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle, 
 wherein a radius ratio of the inner circle and the outer circle is 3.32, 
 wherein the LDPC code includes an information bit and a parity bit, 
 wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit, 
 wherein the information matrix portion is represented by a parity check matrix initial value table, and 
 wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is 
   3 137 314 327 983 1597 2028 3043 3217 4109 6020 6178 6535 6560 7146 7180 7408 7790 7893 8123 8313 8526 8616 8638   356 1197 1208 1839 1903 2712 3088 3537 4091 4301 4919 5068 6025 6195 6324 6378 6686 6829 7558 7745 8042 8382 8587 8602   18 187 1115 1417 1463 2300 2328 3502 3805 4677 4827 5551 5968 6394 6412 6753 7169 7524 7695 7976 8069 8118 8522 8582   714 2713 2726 2964 3055 3220 3334 3459 5557 5765 5841 6290 6419 6573 6856 7786 7937 8156 8286 8327 8384 8448 8539 8559   3452 7935 8092 8623   56 1955 3000 8242   1809 4094 7991 8489   2220 6455 7849 8548   1006 2576 3247 6976   2177 6048 7795 8295   1413 2595 7446 8594   2101 3714 7541 8531   10 5961 7484   3144 4636 5282   5708 5875 8390   3322 5223 7975   197 4653 8283   598 5393 8624   906 7249 7542   1223 2148 8195   976 2001 5005.   
     
     
         29 . A data processing apparatus comprising:
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 8/15; and   a mapping unit that maps a symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 8/15 as one symbol,   wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle,   wherein a radius ratio of the inner circle and the outer circle is 3.50,   wherein the LDPC code includes an information bit and a parity bit,   wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit,   wherein the information matrix portion is represented by a parity check matrix initial value table, and   wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is   32 384 430 591 1296 1976 1999 2137 2175 3638 4214 4304 4486 4662 4999 5174 5700 6969 7115 7138 7189   1788 1881 1910 2724 4504 4928 4973 5616 5686 5718 5846 6523 6893 6994 7074 7100 7277 7399 7476 7480 7537   2791 2824 2927 4196 4298 4800 4948 5361 5401 5688 5818 5862 5969 6029 6244 6645 6962 7203 7302 7454 7534   574 1461 1826 2056 2069 2387 2794 3349 3366 4951 5826 5834 5903 6640 6762 6786 6859 7043 7418 7431 7554   14 178 675 823 890 930 1209 1311 2898 4339 4600 5203 6485 6549 6970 7208 7218 7298 7454 7457 7462   4075 4188 7313 7553   5145 6018 7148 7507   3198 4858 6983 7033   3170 5126 5625 6901   2839 6093 7071 7450   11 3735 5413   2497 5400 7238   2067 5172 5714   1889 7173 7329   1795 2773 3499   2695 2944 6735   3221 4625 5897   1690 6122 6816   5013 6839 7358   1601 6849 7415   2180 7389 7543   2121 6838 7054   1948 3109 5046   272 1015 7464.   
     
     
         30 . A data processing method comprising:
 a coding step of performing LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 8/15; and   a mapping step of mapping one symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 8/15 as one symbol,   wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle,   wherein a radius ratio of the inner circle and the outer circle is 3.50,   wherein the LDPC code includes an information bit and a parity bit,   wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit,   wherein the information matrix portion is represented by a parity check matrix initial value table, and   wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is   32 384 430 591 1296 1976 1999 2137 2175 3638 4214 4304 4486 4662 4999 5174 5700 6969 7115 7138 7189   1788 1881 1910 2724 4504 4928 4973 5616 5686 5718 5846 6523 6893 6994 7074 7100 7277 7399 7476 7480 7537   2791 2824 2927 4196 4298 4800 4948 5361 5401 5688 5818 5862 5969 6029 6244 6645 6962 7203 7302 7454 7534   574 1461 1826 2056 2069 2387 2794 3349 3366 4951 5826 5834 5903 6640 6762 6786 6859 7043 7418 7431 7554   14 178 675 823 890 930 1209 1311 2898 4339 4600 5203 6485 6549 6970 7208 7218 7298 7454 7457 7462   4075 4188 7313 7553   5145 6018 7148 7507   3198 4858 6983 7033   3170 5126 5625 6901   2839 6093 7071 7450   11 3735 5413   2497 5400 7238   2067 5172 5714   1889 7173 7329   1795 2773 3499   2695 2944 6735   3221 4625 5897   1690 6122 6816   5013 6839 7358   1601 6849 7415   2180 7389 7543   2121 6838 7054   1948 3109 5046   272 1015 7464.   
     
     
         31 . A data processing apparatus comprising:
 a demapping unit that demaps data transmitted from a transmission apparatus, based on signal points; and   a decoding unit that decodes the LDPC code obtained from data after the demapping,   wherein the transmission apparatus includes
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 8/15; and 
 a mapping unit that maps a symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 8/15 as one symbol, 
 wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle, 
 wherein a radius ratio of the inner circle and the outer circle is 3.50, 
 wherein the LDPC code includes an information bit and a parity bit, 
 wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit, 
 wherein the information matrix portion is represented by a parity check matrix initial value table, and 
 wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is 
   32 384 430 591 1296 1976 1999 2137 2175 3638 4214 4304 4486 4662 4999 5174 5700 6969 7115 7138 7189   1788 1881 1910 2724 4504 4928 4973 5616 5686 5718 5846 6523 6893 6994 7074 7100 7277 7399 7476 7480 7537   2791 2824 2927 4196 4298 4800 4948 5361 5401 5688 5818 5862 5969 6029 6244 6645 6962 7203 7302 7454 7534   574 1461 1826 2056 2069 2387 2794 3349 3366 4951 5826 5834 5903 6640 6762 6786 6859 7043 7418 7431 7554   14 178 675 823 890 930 1209 1311 2898 4339 4600 5203 6485 6549 6970 7208 7218 7298 7454 7457 7462   4075 4188 7313 7553   5145 6018 7148 7507   3198 4858 6983 7033   3170 5126 5625 6901   2839 6093 7071 7450   11 3735 5413   2497 5400 7238   2067 5172 5714   1889 7173 7329   1795 2773 3499   2695 2944 6735   3221 4625 5897   1690 6122 6816   5013 6839 7358   1601 6849 7415   2180 7389 7543   2121 6838 7054   1948 3109 5046   272 1015 7464.   
     
     
         32 . A data processing method comprising:
 a demapping step of demapping data transmitted from a transmission apparatus, based on signal points; and   a decoding step of decoding the LDPC code obtained from data after the demapping,   wherein the transmission apparatus includes
 a coding unit that performs LDPC coding, based on a parity check matrix of an LDPC code having a code length of 16200 bits and a code rate of 8/15; and 
 a mapping unit that maps a symbol to one of 16 signal points prescribed in 16APSK, with code bits of four bits of an LDPC code having a code length of 16200 bits and a code rate of 8/15 as one symbol, 
 wherein the 16 signal points prescribed in 16APSK are four signal points on an inner circle and 12 signal points on an outer circle, 
 wherein a radius ratio of the inner circle and the outer circle is 3.50, 
 wherein the LDPC code includes an information bit and a parity bit, 
 wherein the parity check matrix includes an information matrix portion corresponding to the information bit and a parity matrix portion corresponding to the parity bit, 
 wherein the information matrix portion is represented by a parity check matrix initial value table, and 
 wherein the parity check matrix initial value table is a table representing positions of elements of 1 in the information matrix portion at an interval of 360 columns, and is 
   32 384 430 591 1296 1976 1999 2137 2175 3638 4214 4304 4486 4662 4999 5174 5700 6969 7115 7138 7189   1788 1881 1910 2724 4504 4928 4973 5616 5686 5718 5846 6523 6893 6994 7074 7100 7277 7399 7476 7480 7537   2791 2824 2927 4196 4298 4800 4948 5361 5401 5688 5818 5862 5969 6029 6244 6645 6962 7203 7302 7454 7534   574 1461 1826 2056 2069 2387 2794 3349 3366 4951 5826 5834 5903 6640 6762 6786 6859 7043 7418 7431 7554   14 178 675 823 890 930 1209 1311 2898 4339 4600 5203 6485 6549 6970 7208 7218 7298 7454 7457 7462   4075 4188 7313 7553   5145 6018 7148 7507   3198 4858 6983 7033   3170 5126 5625 6901   2839 6093 7071 7450   11 3735 5413   2497 5400 7238   2067 5172 5714   1889 7173 7329   1795 2773 3499   2695 2944 6735   3221 4625 5897   1690 6122 6816   5013 6839 7358   1601 6849 7415   2180 7389 7543   2121 6838 7054   1948 3109 5046   272 1015 7464.