Patent ID: 8315471

Claim:
An image processor comprising: a frequency transform unit configured to independently perform frequency transformation on a luminance signal and on plural chrominance signals and configured to output an item of frequency data for the luminance signal and a plurality of items of frequency data for the chrominance signals; and a quantization unit configured to independently perform quantization on an item of frequency data for the luminance signal and a plurality of items of frequency data for the chrominance signals input from the frequency transform unit, wherein the quantization unit performs quantization, with a quantization coefficient having a value greater than “1”, on at least one particular item of frequency data, corresponding to a signal with noise, from among the item of frequency data for the luminance signal and the plurality of items of frequency data for the chrominance signals, and performs quantization, with a quantization coefficient having a value of “1”, on any remaining frequency data apart from the at least one particular item of frequency data.