Umpire Decision Review System

The Decision Review System or Umpire Decision Review System (abbreviated as UDRS or DRS ) is a technology- based system that is used in the sport of cricket. It is the decision of the referee or the review of its decisions by appeal by one of the teams.

History

Initially, the system was used exclusively in Test cricket to check contentious decisions of the referee on the field in case of Dismissals ( resignation ) of a batsman ( hitter ). For the first time officially, the review system by the International Cricket Council in November 2009 in the Test match between New Zealand and Pakistan was used in Dunedin. In the One-Day format was first used in January 2011 during the tour of England in Australia. In June 2011, the ICC makes DRS mandatory for all international games except Twenty20 Internationals. This practice was, however, later reversed. So both teams involved a series of games must currently agree on its use before the start of the series. However, the system will continue to be used in official ICC competitions and support the development by the ICC. Attempts by the ICC, to make the system mandatory for all games again failed primarily to India. In October 2012, the rules of engagement were modified by the ICC.

Components

In principle, the DRS, apart from the video evidence of three components, but the Snickometer is not currently taken into account in the decision-making process:

• Hawk-Eye and Virtual Eye, two competing systems are technologies for ball tracking, which demonstrate the trajectory of the ball gebowlten, which was interrupted by the influence of the batsman. Thus, it can be determined whether the ball would have hit the wicket, if he had not been stopped by the leg protection of the batsman in his flight path. This would then result in a leg before wicket ( lbw ) lead decision and excrete the batsman with it.
• Hot Spot is an image system that operates in the infrared spectral range. It indicates whether the ball had even contact with the bat or the leg shield of the batsman. This is relevant for both LBW and for Caught decisions.
• Snickometer based on directional microphones detect the noise to determine whether the ball had contact with the bat or the leg shield of the batsman.

Use

Each team in each innings of the law, as long as to have it checked referee's decisions with respect to the retirement of a batsman until she had two unsuccessful appeals ( in one- day cricket only an unsuccessful objection per innings ). The field team, the teams are able to challenge decisions only to their disadvantage, ie at " Not Out ", the batting side in "Out". The captain of the fielding side and the batsman who will go out of the game, this signals that it forms with his arms a "T". For this they have 15 seconds each time, allowing them to briefly discuss with the team or the other batsman. If the referee considers, however, that the appeal was initiated by influence from outside of the playing field, do not accept this. Once the review has been requested and approved by the referee, examines the third arbitrator ( third umpire ) in a specially equipped room, the game situation and also in voice contact with the respective referee occurs on the field.

Under certain circumstances, the court referee may also find yourself the third arbitrator on ( so-called Umpire Review), especially in run outs and stumpings, the so-called line Decisions. But even with Hit Wicket, Obstructing the Field and in the case of a Catches on certain aspects of this rule. In boundarys, in addition to court referee, the initiative also start from the third arbitrator himself. Also in the cases where the batsman is "rescued" by a no ball - error of the bowlers before retirement.

The inclusion of Third Umpire Decisions in line with the aid of video evidence existed since 1992, when Sachin Tendulkar the first batsman was, who had to leave the pitch due to a run-out decision of the third arbitrator. This umpire Reviews come today with all relevant international games for use, even if the teams can not agree on the use of the DRS. This then run under the name Third Umpire TV Replay system, as only the video evidence will be used.

However, inspections by the teams (called Player Review ) can affect any kind of Dismissal (except Timed out), and only those. For example, whether the catch of a ball was correct, or whether a Leg Before Wicket has occurred. These notify the third arbitrator, the court referee, whether his analysis supports the first decision is contrary to or can not make a decision. The final decision is then the court referee: either he shows the signal of the first decision again on or signaled that he withdraws the decision and shows with his arms on the corrected decision. Each team can apply for as long as review of judgments, as long as it has its maximum number reaches of unsuccessful checks. Under the rules of the DRS only clearly incorrect decisions shall be revoked. If the third arbitrator is this not detect or can not decide, it stays at the first decision by the court referee.