1. An error concealment method using spatial interpolation and exemplar-based image inpainting, comprising: receiving, by a decoder, an image including a source area and a restoration area to be restored; determining, by the decoder, a target patch which includes a target pixel having the highest priority among pixels positioned in a boundary area of the restoration area; and performing, by the decoder, restoring by exemplar-based image inpainting for the target patch or performing spatial interpolation for the target pixel based on a difference between the target patch and a final source patch of the source area, wherein the final source patch is a candidate source patch having the smallest value obtained by adding a mean-squared error (MSE) distortion and a side matching distortion (SMD) between the target patch and the candidate source patch among the candidate source patches in the source area.