1. Guangxi Key Laboratory of Multimedia Communications and Network Technology, School of Computer, Electronics and Information, Guangxi University, Nanning, China
2. School of Information Science and Technology, Southwest Jiaotong University, Chengdu, China
3. Department of Electrical Engineering, City University of Hong Kong, Hong Kong, SAR, China
4. Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences, Beijing, China