To make processing fast by suppressing an increase in the circuit scale that a quantization table occupies.

The quantization table 109 is not present at each JPEG compression part 110, but shared by a common memory means. The quantization table 109 contains a plurality of quantization tables and a specified quantization table is selected with a select signal inputted from a quantization table selection part 108 to output a quantization value to a quantization part 103.