CPC H04N 19/625 (2014.11) [H04N 19/124 (2014.11); H04N 19/176 (2014.11); H04N 19/182 (2014.11)] | 8 Claims |
1. An apparatus for compressing Joint Photographic Experts Group (JPEG) images, comprising:
a decoding unit to decode a pixel at a specific block location (x, y) to generate a quantized DC coefficient, predict an estimated quantized DC coefficient of a target block to be decoded using quantized AC coefficients of the target block and a pixel value of a decoded block adjacent to the target block, and calculate an estimation error value which is the quantized DC coefficient minus the estimated quantized DC coefficient; and
an encoding unit to encode the estimation error value by Huffman coding.
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