: "Half-OU" stands for Half Over-Under . In this format, the image for the left eye is placed on the top half of the frame, and the image for the right eye is on the bottom half.

: Because two images are squeezed into a single standard frame vertically, the vertical resolution is halved (hence "half"), though it is often preferred over "Side-by-Side" (SBS) for certain types of display technology to maintain better horizontal detail. Film Context

The most interesting feature of this specific version is its , indicated by the "halfOU" tag. The "Half-OU" 3D Feature