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Multimedia Communication

With the advance of telecommunication infrastructure, multimedia communication and cloud services using a video, photo, and voice are increasingly becoming popular. For the future, with the improvement of broadband wireless network and high-performance personal terminal (e.g. as smart phone), multimedia communication service will be used at all network environments. And the world will enter a new age where people take advantage of using an infinite number of multimedia contents stored in cloud storage during communication.

We have for our object a realization of stable multimedia communication and comfortable content access under network environment with variable available bandwidth or electric field strength of wireless network. We are working on the research and development of following technologies.



(1) Network estimation and prediction technology that enables high-accuracy estimation of available bandwidth in real-time, and prediction of network fluctuation for the next few seconds or few minutes.


(2) Network-adaptive communication control technology that enables low-latency communication of transaction data and stable video streaming, and high-speed transportation of large data by application-layer communication control.



By these technologies, we aim at realizing a cloud service which enables people to make a good use of various media contents whenever, wherever.

 

Multimedia Communication

Publications

  • T. Oshiba, and K. Nakajima, "Quick end-to-end available bandwidth estimation for QoS of real-time multimedia communication," 2010 IEEE Symposium on Computers and Communications (ISCC)
  • H. Yoshida, K. Nogami and K. Satoda, “Proposal and evaluation of Joint Rate Control for stored video streaming,” 2010 IEEE International Workshop Technical Committee on Communications Quality and Reliability (CQR) (Best Paper Awards)
  • T. Oshiba, and K. Nakajima, "Quick and simultaneous estimation of available bandwidth and effective UDP throughput for real-time communication," 2011 IEEE Symposium on Computers and Communications (ISCC) (Best Paper Awards)
  • H. Yoshida, K. Nogami and K. Satoda. "Analysis of Network Throughput Dynamics with Viscoelastic Material Model," 2011 IEEE International Conference on Communications (ICC)
  • K. Satoda, H. Yoshida, H. Ito, K. Ozawa, K. "Adaptive video pacing method based on the prediction of stochastic TCP throughput,", 2012 IEEE Global Communications Conference (GLOBECOM)
  • T. Osuga, T. Asakura and K. Taniguchi, “A cache replacement method for crowded streaming cache servers responding to rapidly changing access patterns,” 2013 IEEE 27th International Conference on Advanced Information Networking and Applications (AINA)
  • K. Nihei, S. Nogaki and K. Satoda, “Load reduction methods for DTMF decoders with adaptive omission of frequency analysis,” IEEE 9th International Colloquium on Signal Processing and its Applications (CSPA), 2013

Awards

  • 2008 MultiService Fofum (MSF) Circle Of Excellence Award, K. Taniguchi
  • 2010 IEEE International Workshop Technical Committee on Communications Quality and Reliability Best Paper Awards, H. Yoshida, K. Nogami and K. Satoda
  • 2011 IEEE Symposium on Computers and Communications Best Paper Awards, T. Oshiba and K. Nakajima

Press Release

  • NEC Technologies Accurately Predict Data Transfer Rates of the Internet and Mobile Communication Networks - Predict throughput up to 3 minutes in advance with roughly 80% accuracy –
  • NEC Member Recognized with the MSF "Circle of Excellence Award"