| 摘要 |
PROBLEM TO BE SOLVED: To provide, in general, a method and the like for encoding a picture block having a luminance component.SOLUTION: The method includes: obtaining (103, 301) a luminance residual block (L) by subtracting a first representation (L, L) of an average value of the luminance component calculated from the luminance component; obtaining (102) a second representation (f(L), f(L)) of the average value by applying a transfer function to the average value (L) of the luminance component in order to reduce the dynamic range of the average value; and encoding a luminance block (L) obtained by adding (105, 302) together the luminance residual block (L) and the second representation (f(L), f(L)) of the average value. The present disclosure further relates to a method and the like for decoding the picture block.SELECTED DRAWING: Figure 1 |
