Augmented reality based remote coaching system

In this paper, we present an AR-based tele-coaching system for fast-paced tasks, applied to the game of tennis, and explore for interface design guidelines through a user study. We have evaluated the player's performance for instruction understanding in three different modalities of augmentation: (1) AR --- visual only, (2) Sound --- aural only and (3) Multimodal --- both visual and aural. The augmented instructions were useful even in the stringent temporal conditions, and most effective with the visual only augmentation due to its modal capability of encoding and presenting several information compactly at once.