A SYSTEM AND METHOD FOR DECODING DIGITAL IMAGE AND AUDIO DATA IN A LOSSLESS MANNER

摘要

A method of losslessly decoding signals representing an image is claimed. A lossy compressed data file and a residual compressed data file are received. The lossy compressed data filed is separated into DC coefficients and AC coefficients, and decoded, separately, to the determine DC values and the AC values (130). The DC values and the AC values are inverse quantized to produce lossy, decompressed data (146). The lossy decompressed frequency data is combined with the residual decompressed data to produce a lossless data file, wherein the lossless data file is substantially the same as the original image.