Apparatus for encoding and decoding image using adaptive DCT coefficient scanning based on pixel similarity and method therefor
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United States of America Patent
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Oct 1, 2013
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Mar 23, 2007
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Aug 17, 2006
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Abstract
The present invention discloses an encoding apparatus using a Discrete Cosine Transform (DCT) scanning, which includes: a mode selection means for selecting an optimal mode for intra prediction; an intra prediction means for performing intra prediction onto video inputted based on the mode selected in the mode selection means; a DCT and quantization means for performing DCT and quantization onto residual coefficients of a block outputted from the intra prediction means; and an entropy encoding means for performing entropy encoding onto DCT coefficients acquired from the DCT and quantization by using a scanning mode decided based on pixel similarity of the residual coefficients.
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