Three-dimensional video (3DV) is expected to be the next multimedia technology that provides depth impression of observed scenery with multi-view videos. In fact, studies on 3D video have a long history, heading back two hundred years; but recently, it has risen as the hottest issue due to rapid progresses of IT technologies. Particularly, 3D video systems are the most promising technology in multimedia area. An extension of typical stereoscopic imaging, realistic and natural 3D video technologies are currently under development. In this chapter, the authors describe overall technologies of 3D video systems from capturing to display, including coding standards. Mainly, the chapter focuses on the recent standardization activities by MPEG (moving picture experts group) associated with 3D video coding.