DUBAI  - The most contentious aspect of the Decision Review System - the ball-tracker - is being put to the test by the ICC at the Cambridge University to establish the accuracy of the two rival tracker systems accredited by the ICC for the DRS.

The ball-tracking technologies currently in use for the DRS - the Hawk-Eye and the Virtual Eye - are being tested by a company called Computer Vision Consulting Limited. The results of the test should be available to the ICC's cricket committee in time for its next meeting in May this year.

Dave Richardson, the ICC's general manager of cricket, told ESPNcricinfo in an interview that the company had been asked to review "the level of accuracy and reliability of the two ball-tracking companies ... In terms of accuracy we want to know whether their virtual depictions of where the ball has pitched and where the ball has impacted the batsman accord with the reality, and whether their predictions as to where the ball would have hit the stumps are correct."  The issue of reliability he said was to find out "the percentage of times they can deliver an accurate tracking. If, in a Test, there are 60 lbw appeals and the ball-tracking technology is only able to deliver an accurate tracking on, for example, 50 of those occasions, then they would not be regarded as very reliable. On the other hand, if they were getting it right on 97 out of 100 occasions, we would probably regard that as being acceptable."

Before the introduction of the DRS in 2008, Richardson said, the ICC had conducted some basic manual testing which had left them satisfied before launching the system. The current test he said was "a far more detailed review by a completely independent party. Hawk-Eye and Virtual Eye both tell us how accurate they are, but this will verify those claims." The contention between the two rival ball-tracker technologies was largely around the number of frame rates offered by their cameras in order to provide data to work with the ball tracker.