| 摘要 |
PROBLEM TO BE SOLVED: To reduce the capacity of an RAM required for interpolation operation sharply by using a consecutive address for accessing an LUT while enabling high speed processing. SOLUTION: The data conversion apparatus includes a lookup table 30 which stores output data at the addresses of 125 lattice point coordinates which is expressed by four combinations of 2 significant bits of input data RGB each consisting of 8 bits and one combination for interpolation, an address generating unit 20 which generates a plurality of addresses for reading out the output data from the lookup table 30 according to the input data RGB, and an interpolation operation unit 40 which generates converted data based on the plurality of output data read out from a plurality of addresses generated at the address generating unit 20 and the input data RGB. The lookup table 30 divides the 125 lattice point coordinates into 8 sets according to the fact whether the value expressed by 2 significant bits of input data RGB is odd or even, and 8 RAMs are provided in correspondence with the 8 sets of lattice point coordinates in order to store the output data at the continuous addresses of each RAM. COPYRIGHT: (C)2010,JPO&INPIT
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