1. Electrical and Electronic Engineering Department, Nanyang Technological University, Singapore
2. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
3. Postdoctoral Researcher, Technical University Ilmenau, Ilmenau, Germany
4. Electronic Media Technology group, TU Ilmenau, Ilmenau, Germany
5. Ph.D. degree, Technical University Ilmenau, Ilmenau, Germany
6. Professor (emeritus), Technical University Ilmenau, Ilmenau, Germany
7. Department of Signal Processing and Acoustics, Aalto University, Espoo, Finland