Adaptive Deblocking Filter for Dct Coded Video

In this paper we propose a new post-processing algorithm to reduce the blocking artifacts in block based video coding, while maintaining a low computational complexity. This algorithm is mainly based on an adaptive conditional two-dimensional filter, derived from the combination in horizontal and vertical directions of a simple two-mode conditional 1-D filter. By taking into account spatial pixel activities as well as the quantization step, the local degradation of the image is assessed to select the appropriate filtering mode. Experimental results demonstrate that the proposed algorithm improves both subjective and objective picture quality.