Image data decoding apparatus and method

Abstract

An image data decoding apparatus according to an embodiment of the invention includes: a variable length coder/decoder for decoding compressed image data to output a quantization coefficient; a non-zero coefficient detector for examining whether or not the quantization coefficient includes a non-zero coefficient for each examination unit; a quantization coefficient FIFO for storing, if the examination unit includes one or more non-zero coefficients, the quantization coefficient of the examination unit as a significant coefficient; a significant coefficient flag FIFO for storing a significant coefficient flag that indicates whether or not the examination unit is a significant coefficient, and a zero coefficient generator for reconstructing the quantization coefficient based on the significant coefficient flag and significant coefficient.

Dependencies are inferred from the claim text.