| 摘要 |
A first image is encoded and two reconstructions are generated from the encoded first image using two different reconstruction offsets. A second image is encoded using temporal prediction based on a reference image selected from a set comprising the two reconstructions. Obtaining the second reconstruction offset comprises partitioning the encoded first image to select the blocks Bk of one partition, for example using criteria based on CTB, PU, TU of the HEVC standard or the Skip mode, then for several reconstruction offsets, estimating a distortion measure (SAD, SSD, PSNR) based only on blocks collocated with those selected blocks, between the first reconstruction and an image reconstruction of the first image using each offset, and selecting the offset associated with minimum distortion. Using a restricted set of data blocks to calculate the distortion measures reduces the computational complexity when selecting a second reconstruction offset. |
