In order to deal with the problem of lower render quality and unsatisfactory subjective effect of virtual view in the virtual views synthesis system

and to improve the compression performance of the depth map

the filtering for decoded low resolution depth maps and a depth upsampling method are investigated in the depth map encoding method based on the down/up sampling in this paper. First

H.264/MVC is used to compress the low-resolution depth map according to the character of the depth map. Then

the À-Trous wavelet filter is used to filter the decoded low-resolution depth map to decrease the artificial effect

and a depth upsampling method based on multi-similarity adaptive support weight is used to reconstruct the original resolution depth map. Finally

up-sampling depth map and an uncompressed color sequence is used to render the virtual view and to evaluate the render quality by PSNR of the virtual view. The experimental result shows that the PSNR of two proposed methods are 0.04 dB and 0.22 dB higher than ASW(adaptive support-weight) respectively

and subjective quality of the virtual view is improved a lot

especially the later one.