Transform-domain Wiener filtering for H.264/AVC video encoding and its implementation

For coding efficiency as well as noise reduction, efficient de-noising needs to be performed prior to video encoding. This paper proposes a transform-domain Wiener filtering scheme in an H.264/AVC video encoder. We show that the generalized Wiener filtering for each integer-transformed block is equivalent to multiplication of multiplication factor (MF) in a block with a proper filter coefficient matrix in a quantization process. Also, we implement efficiently the proposed scheme by employing several predetermined modified MF´s for quantization. Experimental results show that the proposed de-noising scheme provides outstanding coding efficiency as well as noise reduction in an H.264/AVC video encoder.