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This article explains video frame interpolation, compares algorithm categories, and deep‑dives into Kuaishou’s KFRUC method—covering its hybrid motion estimation, occlusion detection, and motion compensation techniques that enable smooth slow‑motion playback without stutter.
Youku enhances online video by applying intelligent post‑production contrast mapping, device‑specific HDR tone‑mapping, high‑frame‑rate restoration through frame‑rate conversion, and ROI‑aware encoding that allocates bitrate to key visual areas, complemented by audio processing, to deliver cinema‑grade quality across diverse screens.
During the World Cup, Youku used a frame‑rate‑up‑conversion algorithm that synthesizes intermediate frames by combining block‑based motion estimation, optical‑flow refinement, and a rule‑based plus deep‑learning fusion, enabling smooth 25→50 fps video and preserving fast‑moving objects such as a football.