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Image coding method and apparatus for localised decoding at multiple resolutions

  • US 20040170332A1
  • Filed: 01/26/2004
  • Published: 09/02/2004
  • Est. Priority Date: 07/03/1998
  • Status: Active Grant
First Claim
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1. A method of encoding a coded representation of a digital image, wherein the coded representation includes a non-redundant hierarchical code, having one low frequency subband and a plurality of high frequency subbands arranged in levels, which levels combine to represent multiple resolutions of the image, said method including the steps of:

  • a) dividing each subband into a plurality of tiles;

    b) entropy encoding each tile;

    c) selecting a plurality of desired resolutions from said multiple resolutions; and

    d) arranging in contiguous manner, for each level between each pair of adjacent selected resolutions, each entropy encoded tile representing substantially the same portion of image into a bit stream.

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