Bipredictive Video Super-Resolution Using Key-frames

Many scalable video coding systems use variable resolution frames to enable different decoding layers. Some of these systems also use frame down-sampling along with enhancement layers to reduce complexity. In order to do that, super-resolution methods associated with efficient interpolation processes may help to increase the quality of low-resolution frames. This work presents a super-resolution technique based on key frames. The goal is to restore the high-frequency information of down-sampled frames using high-resolution frames as references. The super-resolved frames can be used in scalable video coders, in variable quality coders, or in the side information generation for distributed coders. Results indicate substantial improvements over previous schemes.