Implementation and evaluation of fast mobile vnc systems

Ha Young Ko, Jae Hyeok Lee, Jong Ok Kim

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


VNC (virtual network computing) is a popular tool for sharing an application, allowing users to access graphic displays remotely. In mobile VNC systems, it has been challenging to increase screen update rate by fast screen image encoding. In this paper, we implement a prototype system for mobile VNC, and several works are done for improving screen update rate. At first, a number of video encoders are integrated into a prototype system, and we investigate what is the most suitable codec for mobile VNC. The existing RFB protocol is extended straightforwardly to integrate video codecs. Next, the overall system architecture is modified from serial operation to parallel. Finally, we propose a modified region coding to further reduce the encoding time of screen images. The proposed methods are implemented into our prototype mobile VNC system, and practical performances are widely evaluated. We report that JPEG is the most suitable for mobile VNC in terms of both complexity and compression ratio. In addition, the proposed modified region coding can decrease encoding time, and consequently increase screen update rate.

Original languageEnglish
Article number6414987
Pages (from-to)1211-1218
Number of pages8
JournalIEEE Transactions on Consumer Electronics
Issue number4
Publication statusPublished - 2012


  • mobile VNC
  • modified region coding
  • screen image coding

ASJC Scopus subject areas

  • Media Technology
  • Electrical and Electronic Engineering


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