Patent ID: 7593583

Claim:
An information compression apparatus which compresses information and uses a DCT frequency conversion algorithm, comprising: a plurality of block registers which store block-based multi-bit quantized data converted from information output from a quantization execution module; a correction level register which presets a correction level indicating a number of data corrections and/or modifications; a first control mechanism which controls operations of said apparatus so as to consider the plurality of block registers in a scan order and search each block, according to said scan order, for a valid coefficient; and a data correction mechanism configured to modify the valid coefficient, found in the search, to an invalid coefficient until a number of the valid coefficients modified to invalid coefficients reaches the correction level preset in the correction level register, wherein the said data correction mechanism moves an isolated valid coefficient that is at a first address not adjacent to another valid coefficient containing address, to a second address that is adjacent to said another valid coefficient containing address, when modifying the valid coefficient to the invalid coefficient based on the correction level causes information deterioration to an extent exceeding a predetermined limit.