COMPATIBLE TELEVISION PICTURE SUB-BAND CODING/DECODING

摘要

PCT No. PCT/FR94/00239 Sec. 371 Date Jun. 5, 1996 Sec. 102(e) Date Jun. 5, 1996 PCT Filed Mar. 4, 1994 PCT Pub. No. WO94/22267 PCT Pub. Date Sep. 29, 1994A coder/decoder including a device for constructing from the preceding decoded image and from the current source image two pyramids of images of unlike resolution. Each pyramid contains the same number of images ordered identically according to their resolution. Each image corresponds to a level of resolution which is half as large in the horizontal and vertical directions of the image as a preceding level of resolution. Each pyramid is applied to a first and second serial input of the hierarchical motion estimator which outputs a motion vector having a magnitude which is proportional to the estimated motion between the two pyramids.