| 摘要 |
<p>A hierarchical image coding device (101) includes a subsampling unit (2) for subsampling a high-resolution picture signal (HSg) as a picture input signal so as to generate a low-resolution picture signal (LSg), a low-resolution coding section (101L) for sequentially coding the low-resolution picture signal (LSg) at every block consisting of a plurality of pixels, and a high-resolution coding section (101H) for sequentially coding the high-resolution picture signal at every block consisting of a plurality of pixels, as shown in the Figure. In coding the high-resolution picture signal (HSg), a low-resolution picture signal (LSg) corresponding to a reference low-resolution block located at the same spatial position as that of a target high-resolution block to be coded is referred to. In the hierarchical image coding device (101) of such structure, a picture signal having shape information of an object may be hierarchically coded without causing deterioration in coding efficiency.</p> |
