A Mathematical Model for Interaction Analysis between Multiview Video System and User You Yang 1,2,5 , Gangyi Jiang 1,2 , Mei Yu 2,3 , Zhu Peng 4 1 Institute of Computing Technology, Chinese Academy of Science, Beijing, 100080, China 2 Faculty of Information Science and Eng., Ningbo University, Ningbo, 315211, China 3 National Key Laboratory of Machine Perception, Peking University, 100871, China 4 School of Mining and Safety Engineering, China University of Mining and Technology, Xuzhou, 221008, China 5 Graduate School of Chinese Academy of Science, Beijing, 100080, China {sayu_yangyou, jianggangyi}@126.com Abstract. Multiview video coding (MVC) plays an important role in three- dimensional audio-video (3DAV) systems. Multiview video display systems are built to provide interactive video services and quality of services (QoS) provided by the system is currently under consideration. MVC encoder uses advanced coding schemes and group of GOP (GoGOP) structure to pursue high compressibility. There is a conflict between compressibility and access ability, i.e., QoS of interaction. In this paper, several evaluation functions are proposed to measure the load and access ability of multiview video system. A nonlinear multipurpose mathematical model based on these functions is provided for interaction analysis. On considering the model, the access ability is a factor to be taken into account for encoder when high compressibility is the primary, and so is the compressibility when trying to achieve high access ability. Keywords: Multiview video coding, random access, interaction analysis 1 Introduction Video services have greatly changed our daily life. With the technical development in various fields, more and more flexibility has been provided. Furthermore, more and more research efforts were exerted than ever before in the field of advanced applications including interactive free viewpoint television (FTV) or other multiview video services. As a natural extension to the monoview video, multiview video or FTV can be widely used in many applications, such as advertisement, educational program, sports, and some important events. Therefore, the QoS problems of multiview video system are emerging. MPEG has formally begun the research on 3DAV, including MVC and FTV [1] . Along with other technologies, temporal and view random access, i.e., video VCR functionalities, are basic requirements for MVC [2] . Random access requires the decoder to access a frame in a given time and view with minimal decoding frame cost. Since then, experimental interactive multiview video (MV) display systems have been