• Unity
• lip tracking
• image processing
• facial expression
• Unreal
• VOIP
• VR

This thesis covers the design and the development of an application that aims to improve the immersivity in a shared Virtual Reality system using video and audio feedback. The main limitation of an online VR application is the use of avatars for faking the real user. This avatars are always mannequins with no kind of facial expression, that in many application (like online games) is not a big problem, but that in a collaboration system can became a strong weakness. We considered a learning system, in which the apprentice has no feedback but the master voice and we added different kind of master's video feedback to check if there was an improvement of the experience.