Wavelet-based super resolution of downsampling-based compressed video

Abstract

Downsampling performed prior to encoding in video compression discards the high-frequency information of the original video frames. This necessitates super resolution (SR) to recover the lost information after decoding. In this paper, we propose a framework for the downsampling-based video compression problem along with a method for wavelet-based SR. We develop a framework by integrating the downsampling and transform steps of the conventional models. We then use the proposed SR method implemented directly on the wavelet sub-bands at the decoder side. Experimental results demonstrate the superiority of the proposed method in comparison with the conventional techniques employed for resolution enhancement of decoded videos.