In conventional motion compensated temporal filtering based wavelet coding scheme

where the size of group of picture and low-pass frames’ positions are fixed

and the motion activities in video sequences are not considered.In this paper

we propose a haar-like motion compensated temporal filtering based wavelet video coding scheme

which can adaptively select the size of group of picture and the low-pass frames based on mutual information technology.Then

the temporal decomposition level is determined using the selected size of group of picture and the low-pass frames' position.We compare the PSNR performance of the proposed scheme with the conventional scheme by carrying out a large amount of experimental work.When the video sequence has high motion activity

the proposed low-pass frame selection can improve the compression quality by about 0.3~0.5 dB compared with the conventional scheme;And

the proposed adaptive approach for selecting the size of group of picture is more suitable for situations with un-even variation of motion activities

e.g.with frequent shot cuts.