1. Department of Electronic & Communication Engineering, Engineering College, Yanbian University, Yanji 133002, China
2. Department of Artificial Intelligence & Convergence, Daejeon University, Daejeon 300716, Republic of Korea
3. Department of Computer and Information Security, Sejong University, Seoul 05006, Republic of Korea
4. Department of Electric Engineering, Sejong University, Seoul 05006, Republic of Korea
5. Department of Computer Engineering, Jeju National University, Jeju 63243, Republic of Korea