Abstract
Virtual Network Computing (VNC) has emerged as a
promising technology in distributed computing environment
since its invention in the late nineties. Successful application of
VNC requires rapid data transfer from one machine to another
over a TCP/IP network connection. However transfer of screen
data consumes much network bandwidth and current data
encoding schemes for VNC are far from being ideal. This paper
seeks to improve screen data compression techniques to enable
VNC over slow connections and present a reasonable speed
and image quality.
In this paper, a hybrid technique is proposed for
improving coding efficiency. The algorithm first divides a
screen image into pre-defined regions and applies encoding
schemes to each area according to the region characteristics.
Second, correlation of screen data in consecutive frames is
exploited where multiple occurrences of similar image contents
are detected. The improved results are demonstrated in a
dynamic environment with various screen image types and
desktop manipulation.
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