Image decoding method

Details Image decoding method Image decoding method

H - Electricity

04

N

H04N 7/30 (2006.01) H04N 1/41 (2006.01)

Patent

CA 2400496

An image decoding method of receiving a bit stream which includes coded inforniation of image data each divided into tiles each containing N pixels x M pixels and separately wavelet-encoded, and management information including information for specifying a memory location of the coded information for managing and identifying each tile or each resolution, and decoding a coded image corresponding to a necessary tile and a necessary resolution. The image decoding method separates the management information from an input bit stream; sets a tile or a resolution to be decoded according to a user's instructions; identifies a memory location of the coded inforn~ation which corresponds to the tile or the resolution to be decoded with reference to the management inforn~ation according to the setting step; extracts a portion of coded information from the bit stream, which corresponds to the set tile or the resolution based on the memory location of the identified coded information, and conducts wavelet-decoding of the coded data extracted by the coded data extracting step, so as to combine the wavelet-decoded images on a tile-by-tile basis, so that a desired image area is decoded, in a desired resolution, according to a user's instructions.

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