1. School of Computer Science and Engineering, Central South University, Changsha, Hunan, China
2. Guangdong Multimedia Information Service Engineering Technology Research Center, Shenzhen University, Shenzhen, Guangdong Province, China
3. Institute of Information Science, School of Computer and Information Technology, Beijing Jiaotong University, Beijing, China
4. Department of Electrical Engineering and Computer Science, University of Missouri, Columbia, MO, USA
5. Faculty of Technical Sciences, University of Kragujevac, Cacak, Serbia
6. Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, Guangdong Province, China