An Adaptive Video Sub-sampling Technique for the Conversion Between High and Low Resolution

An adaptive sub-sampling technique is proposed for the conversion of high-resolution video to lowresolution video, which will eventually be converted back to high resolution. This technique can preserve high spatial frequency information by exploiting the temporal correlation of stationary regions without any extra storage or transmission bandwidth. Coding complexity can be reduced by a factor of four if the video is to be eventually displayed in highresolution, with small degradation in visual quality and peak-signal-to-noise ratio. Most of the edge information can be preserved when the lowresolution video is converted back to high-resolution video and significant improvement can be obtained compared with conventional methods.