Image data coding apparatus, method of controlling operation of same, and program therefor
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United States of America Patent
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Aug 12, 2014
Grant Date -
Dec 6, 2012
app pub date -
May 14, 2012
filing date -
May 30, 2011
priority date (Note) -
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Abstract
A wavelet transform, binary arithmetic coding and pass-by-pass partitioning of coded data streams according to JPEG 2000 are carried out and first and second layers for which the decoded image will have distortion ratios within a desired range are generated. If the total amount of code in the first layer is smaller than a target amount of code, then, from among coded data streams contained in the second layer, coded code up to a pass within a coded data stream having little influence upon image quality is added to the first layer. If the total amount of code in the first layer is greater than the target amount of code, then, from among coded data streams contained in the first layer, coded code within a coded data stream having little influence upon image quality is deleted from the first layer.
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