| 摘要 |
A video coding method enabling implementation of resolution scalability while improving the coding efficiency. In the method, a band dividing section 104 performs band division on a high-resolution original image to generate a middle-resolution image, horizontal component, vertical component and diagonal component. The horizontal component is subjected to the DCT processing in horizontal layer DCT section 124, and then subjected to the bit-plane VLC processing in horizontal layer bit-plane VLC section 126. The vertical component is subjected to the DCT processing in vertical layer DCT section 130, and then subjected to the bit-plane VLC processing in vertical layer bit-plane VLC section 132. The diagonal component is subjected to the DCT processing in diagonal layer DCT section 136, and then subjected to the bit-plane VLC processing in diagonal layer bit-plane VLC section 138. In scanning, a scanning order is determined in consideration of bias in the distribution of DCT coefficients for each band component.
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