Patent ID: 8249182
Filing Date: 2012-08-21
Classification: H04N

Abstract:
1. A decoding circuit that decodes encoded data generated by image compression encoding for transforming image data into plural coefficient data in units of a block of a predetermined number of pixels and rearranging the transformed plural coefficient data according to a scan pattern indicating order of the coefficient data, the decoding circuit comprising: a pattern storing unit that stores scan pattern data for a scan pattern; a control unit that rewrites, according to encoded data, the scan pattern data stored in the pattern storing unit into at least one scan pattern data for an encoding system of the encoded data and generates, according to the encoded data, pattern selection information indicating a selection method for selecting one scan pattern data suitable for the encoded data out of the at least one scan pattern data stored in the pattern storing unit; a pattern readout unit that selects one scan pattern data suitable for the encoded data out of the at least one scan pattern data stored in the pattern storing unit using the pattern selection information and reads out the selected scan pattern data stored in the pattern storing unit; a coefficient restoring unit that restores coefficient data from the encoded data; and an inverse scan processing unit that rearranges, according to the scan pattern data read out by the pattern readout unit, the coefficient data restored by the coefficient restoring unit.