A reduced complexity loop filter using coded block pattern and quantization step size for H.26L video coder

This paper addresses a reduced complexity one-dimensional loop filter to simultaneously reduce blocking and ringing artifacts of H.26L video coder. A new one-dimensional regularized smoothing functional is defined and the regularization parameters controlling the degree of smoothness to two neighboring directions are determined by coded block pattern and quantization step size which are available both in the encoder and decoder. Therefore, no information is necessary to obtain the recovered image from the compressed video. The experimental results show the capability of the proposed algorithm.