Method of relocating wavelet packet coefficient
AssigneeLG Electronics Inc.
InventorHyun Duk Cho
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Abstract
The present invention is related to a image compression and transmission method, and particularly to a method of relocating a wavelet packet coefficient for a zerotree coding in order to optimize an encoder to be suitable for transmitting image off-line. To realizing the present invention, for the wavelet packet coefficients, located on frequency bands which are divided in several subbands according to frequency of an image data thereon, the present invention collects coefficients in same location on each of the subbands, and relocates the collected coefficients in a same location in an integrated frequency band, formed by integrating the subbands.
Claims20
A method for relocating wavelet packet coefficients, comprising the steps of:
- (a) transforming image data into the wavelet packet coefficients, the wavelet packet coefficients being located on a frequency band divided into frequency subbands depending upon frequency components;
- (b) collecting the wavelet packet coefficients in same locations of each frequency subbands that are in a frequency band, called pseudo-subband, covering a certain range of frequency;
- and
- (c) relocating the collected wavelet packet coefficients on the pseudo-subband.
A method for relocating wavelet packet coefficients, comprising:
- (a) transforming image data into the wavelet packet coefficients by filtering and subsampling the image data;
- (b) collecting the wavelet packet coefficients in same locations of each subband that is in an integrated frequency band;
- and
- (c) relocating the wavelet packet coefficients on the integrated frequency band so as to produce a tree structure to be zerotree coded.
Dependencies are inferred from the claim text.