IMAGE CODING DEVICE, IMAGE CODING METHOD, AND IMAGE DECODING DEVICE
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
Apr 17, 2008
filing date -
Apr 18, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An image coding device includes a block dividing unit that divides image data into blocks, so as to generate block data, each of the blocks being formed with a plurality of pixels, a DCT unit that carries out a discrete cosine transform on the block data, so as to generate DCT coefficients, a feature analyzing unit that analyzes the block data, so as to generate feature data, a quantization parameter generating unit that refers to the block data and the feature data, and generates a quantization matrix, a quantizing unit that quantizes the DCT coefficients with the use of the quantization matrix, so as to generate quantized data, and a variable-length coding unit that performs variable-length coding on the quantized data, so as to generate variable-length coded data.
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