A Novel Remote Screen Synchronization Mechanism for Ubiquitous Environments

In server-based computing (SBC), one key step is to send the server screen to the clients timely. To reduce the bandwidth taken by this transfer, many encoding techniques such as Hextile, Zlib, Tight, FCE have been presented. Since they only take the spatial redundancy into account, the reduction of bandwidth is limited and the bottleneck of transfer is still prominent, especially in ubiquitous environments. This paper presents a novel mechanism for remote screen synchronization based on the association of spatio-temporal redundancy reductions (ASTR), which can reduce the screen data transfer further. The temporal redundancy between the current changed screen area and the previous frame is taken into account. An improved SSC-APDS (subsampling search candidates in adjustable partial distortion search) algorithm is presented, which can increase the speed of the block motion estimation (BME) prominently. Experimental results show that this novel approach can reduce more bandwidth consumption of transferring the screen data than others, which quite caters for the requirements of the ubiquitous environments