An Encoder-Embedded Video Denoising Filter Based on the Temporal LMMSE Estimator

Noise not only degrades the visual quality of video contents, but also significantly affects the coding efficiency. Based on the temporal linear minimum mean square error (LMMSE) estimator, an innovative denoising filter is proposed in this paper. The proposed filter only requires simple operations manipulating on the individual residue coefficients and can be seamlessly integrated into video encoders. Compared to traditional filter-encoder cascaded scheme, embedding the proposed filter into the video encoder can save a large amount of computation. The experimental results show that with the proposed filter embedded, both the noise suppression capability and the coding efficiency of the video encoder can be dramatically improved. Furthermore, as a purely temporal filter, it can well preserve the fine details of video contents and satisfactory visual quality can be achieved