1. College of Media Engineering, Communication University of Zhejiang, Hangzhou, China
2. School of Engineering and Computer Science, Victoria University of Wellington, Wellington, New Zealand
3. Mathworks, Natick, MA, USA
4. Qianjiang College, Hangzhou Normal University, Hangzhou, China
5. School of Informatics Science and Technology, Zhejiang Sci-Tech University, Hangzhou, China