|Affiliation||Faculty of Informatics, Department of Information Systems|
|Profile||In 1984, I joined Nippon Telegraph and Telephone Public Corporation (now NTT), Japan. I have been engaged in research on Super High Definition image processing and its application to 4K digital cinema. In 2000, we developed 4K digital cinema transmission system, which is based on JPEG 2000 coding technology and transmits high quality 4K digital cinema over high-speed IP networks. All digital cinema data are continuously transmitted at up to 500 Mbps. This system opens the door to the next generation of cinema-class digital content distribution over optical networks.
In 2008, I left NTT, and joined Tokyo City University. My interest move to the subjective assessment of video communications. To improve the assessment, we introduce more precise measuring methods into QoE evaluation of bi-directional video communications. We developed a new real-time measuring system for subjective assessment. Precise measurement of user QoE is the main key point for developing next generation networks.
Almost all digital media is now transmitted over all IP based network and the demand for wireless is rapidly increasing. For this purpose, we evaluate the packet loss characteristics of video streaming with UDP using MMT format over wireless LAN. As a result, we clarify that RS (Reed-Solomon) error correction code provides good transmission characteristics compared to conventional Pro-MPEG. With this method, we explore the possibility of high quality video streaming, such as 4K video, over wireless LAN.
|Research Field(Keyword & Summary)||
|Award||Achievement Award of IEICE|
|Recruitment of research assistant(s)||No|
|Affiliated academic society (Membership type)||IEEE, IEICE(Fellow)|
|Education Field (Undergraduate level)||Information Theory, Communications, Digital Signal Processing|
|Education Field (Graduate level)||Information Networks|