Definitions: MoCap (motion capture): the process of recording movement and translating the movement onto a digital model.
Facial Rig:
"Rigging", also called
Skeletal animation, is a technique in
computer animation in which a character is represented in two parts: a surface representation used to draw the character (called the skin) and a hierarchical set of bones used for animation only (called the skeleton).
More info:
Official Website:
Image Metrics
Article:
The Times Online