Temporal coding/decoding process and coder and decoder associated

摘要

The invention concerns a temporal coding process of a video sequence comprising the following steps:
a) selecting (52) at least one group of frames in the video sequence;
c) computing (62) frames from the frames of the selected group of frames (53);
d) selecting a group of frames among the computed frames;
e) repeating (49, 65) steps c) and d) until a level n of temporal decomposition equal to N;
f) coding (50B, 66B) some of the computed frames;
characterised in that it comprises an initial phase (33) comprising a step of selecting (32) an initial group of frames (34) including 3.2 N -1 original frames, and a step of performing steps c) to f) on this initial group of frames (34). The invention also relates to a coder, a decoder and a decoding process associated.