1. Shenzhen Key Laboratory of Digital Creative Technology, Shenzhen University, Shenzhen, China
2. Zhejiang University/University of Illinois at Urbana–Champaign Institute, Zhejiang University, Haining, China
3. Department of Communication Engineering, Harbin Institute of Technology, Harbin, China
4. School of Computer Science and Engineering, University of Electronic Science and Technology of China, Chengdu, China
5. Information Systems Technology and Design, Singapore University of Technology and Design, Singapore
6. Department of Computer Science, College of Engineering Mathematics and Physical Sciences, University of Exeter, Exeter, U.K.