Improving coding and delivery of video by exploiting the oblique effect

Oblique effect implies lower visual sensitivity to diagonally oriented spatial oscillations as opposed to horizontal and vertical ones. To exploit this phenomenon we propose to use an adaptive anisotropic low-pass filter applied to video prior to encoding. We then describe design of such a filter. Through experiments, we demonstrate that the use of this filter can yield appreciable bitrate savings compared to conventional filtering and encoding of the same content.