Image coding method, image decoding method, image coding apparatus, and image decoding apparatus
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United States of America Patent
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Jul 26, 2016
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Apr 23, 2015
app pub date -
Dec 30, 2014
filing date -
Dec 15, 2011
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Abstract
An image coding method, comprising: subtracting a prediction signal from the input image signal for each coding unit, thereby generating respective prediction error signals; performing orthogonal transform and quantization on a corresponding one of the prediction error signals for each transform unit, eventually generating quantization coefficients; and coding pieces of management information indicating a structure of the transform units and the quantization coefficients into a tree structure. Each of the transform units corresponds to a corresponding one of leaf nodes in the tree structure. In the coding, for each leaf node, management information and a quantization coefficient are coded, eventually generating a coded signal in which the coded management information and the coded quantization coefficient are arranged in succession for each leaf node.
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