Data encoding method, computer readable recording medium, and data encoding device

A computer readable recording medium in which a computer program for executing the data encoding method, the method comprising:

• mapping, according to a first mapping rule, 2n number of symbol data out of the 3n number of symbol data into a first group, wherein the first group has 2n number of symbol data;
• converting, according to a second mapping rule, n number of symbol data out of the 3n number of symbol data into a second group, wherein the second group has 2n number of symbol data, wherein each of a plurality of modulation units includes the first group and the second group;
• arranging the first group and the second group in each of the plurality of modulation units, each of the symbol data of the first group being not adjacent to one another, and each of the symbol data of the second group located between the adjacent symbol data of the first group, wherein each of the plurality of the modulation units has 4n number of symbol data;
• and
• outputting a modulation page having 2N×2M pixels, each of N and M being a natural number, wherein the modulation page has the plurality of the modulation units, wherein the 3n number of symbol data have a plurality of levels.

A data encoding device for encoding 3n number of symbol data, n being a natural number, the data encoding device comprising:

• a mapping part configured to map, according to a first mapping rule, 2n number of symbol data out of the 3n number of symbol data into a first group, wherein the first group has 2n number of symbol data;
• a converting part configured to convert, according to a second mapping rule, n number of symbol data out of the 3n number of symbol data into a second group, wherein the second group has 2n number of symbol data, wherein each of a plurality of modulation units includes the first group and the second group;
• an arranging part configured to arrange the first group and the second group in each of the plurality of modulation units, each of the symbol data of the first group being not adjacent to one another, and each of the symbol data of the second group located between the adjacent symbol data of the first group, wherein each of the plurality of the modulation units has 4n number of symbol data;
• and
• an outputting part configured to output a modulation page having 2N×2M pixels, each of N and M being a natural number, wherein the modulation page has the plurality of the modulation units, wherein the 3n number of symbol data have a plurality of levels.