A nonlinear algorithm for enhancing low bit-rate coded motion video sequence

An iterative postprocessing algorithm is proposed in the paper to reduce the coding artifacts produced by block based motion compensated transform coding. In the proposed approach, the adaptive spatial operations followed by the adaptive motion compensated temporal operation are applied to the reconstructed image iteratively. As both the spatial and the temporal operations are adaptive to the image contents in both the spatial and the temporal domain, iteratively applying those operations to the reconstructed image can greatly reduce the coding artifacts without blurring image details. The computer simulations show that by using the proposed algorithm, one can reduce the coding artifacts and improve the quality of the reconstructed image effectively