Pano

TLDR

Streaming 360° videos requires more bandwidth than non‑360° videos because current solutions assume users perceive quality the same way, so bandwidth must be proportional to the size of the user’s field of view. We identified unique quality‑determining factors for 360° videos—viewpoint speed, recent luminance change, and depth‑of‑field differences—that can reduce bandwidth demand.

Abstract

Streaming 360° videos requires more bandwidth than non-360° videos. This is because current solutions assume that users perceive the quality of 360° videos in the same way they perceive the quality of non-360° videos. This means the bandwidth demand must be proportional to the size of the user's field of view. However, we found several quality-determining factors unique to 360° videos, which can help reduce the bandwidth demand. They include the moving speed of a user's viewpoint (center of the user's field of view), the recent change of video luminance, and the difference in depth-of-fields of visual objects around the viewpoint.