Link-aware reconfigurable point-to-point video streaming for mobile devices

Suk Kyu Lee, Seungho Yoo, Jongtack Jung, Hwangnam Kim, Jihoon Ryoo

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Even though people of all social standings use current mobile devices in the wide spectrum of purpose from entertainment tools to communication means, some issues with real-time video streaming in hostile wireless environment still exist. In this article, we introduce CoSA, a link-aware real-time video streaming system for mobile devices. The proposed system utilizes a 3D camera to distinguish the region of importance (ROI) and non-ROI region within the video frame. Based on the link-state feedback from the receiver, the proposed system allocates a higher bandwidth for the region that is classified as ROI and a lower bandwidth for non-ROI in the video stream by reducing the video's bit rate. We implemented CoSA in a real test-bed where the IEEE 802.11 is employed as a medium for wireless networking. Furthermore, we verified the effectiveness of the proposed system by conducting a thorough empirical study. The results indicate that the proposed system enables real-time video streaming while maintaining a consistent visual quality by dynamically reconfiguring video coding parameters according to the link quality.

Original languageEnglish
Pages (from-to)1-25
Number of pages25
JournalACM Transactions on Multimedia Computing, Communications and Applications
Issue number1
Publication statusPublished - 2015 Aug 1

Bibliographical note

Publisher Copyright:
© 2015 ACM.


  • Experimentation
  • H.5.1 [information interfaces and presentation]: multimedia information systems - video
  • Link-state feedback
  • Measurement
  • Mobile multimedia system
  • Performance
  • Reconfigurable video coding

ASJC Scopus subject areas

  • Hardware and Architecture
  • Computer Networks and Communications


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