| exploiting the temporal redundancies present in an image sequence (as done by MPEG) |
| techniques: hierarchical motion compression, 3D subband coding |
| very time consuming - 256x256x8bpp image on 66MHz 80486 - 0.25 sec inverse wavelet transform of a single full frame (4 frames per second) |
| it is necessary to perform the complete inverse transform for each frame (in a slowly varying image sequence) |
| 16 frames per second if just transform changes in image -- fewer nonzero pixels and so faster |