Camera locations per KHL technical regulations

In order for video judge to have the opportunity to make the right decision, videoReferee® cameras on the ice hockey rink should be located and oriented strictly in a certain way.

Camera position and orientation of cameras are determined by the rules of the competition.

Our specialists created visualization of camera locations and their field of view. In addition to simple images we made a special 3-dimensional PDF, which allows you to interactively explore all the nuances of the camera locations.

According to 2016/2017 KHL requirements the "video-goal" system shall include the following cameras:

  • Inside the goal (Sec. 1.23a) (wireless GN-Cam);
  • Behind the goal (Sec. 1.23a);
  • Over the goal (Sec. 1.23a) ;
  • Panoramic (Sec. 1.25);
  • On the blue lines (Sec. 1.24d).

From KHL 2016/2017 regulations:

"The camera inside the goal is installed at the upper part of the vertical goal post. The lens must be located at the junction of the upper inner arc and central goalpost and be directed down the goal line. The camera view should include the goal-line and bottom portions of the goal posts. The goal-line in the picture should be straight.

Behind the goal camera should be installed outside the rink board lined up at the center of the goal. The lens must be at 20-25 cm above the top of the rink board. The camera view should include the area of the goal and the area at a distance of one meter around the goal.

Above the goal camera view should contain the area of the goal and the area around the goal at a distance of one meter.

Starting with 2017/2018 season all arenas hosting home matches of KHL clubs must be equipped with additional cameras on the blue lines."

For a detailed view, use the 3D* PDF file (69 MB).

* - requires Adobe Acrobat Reader DC Adobe Acrobat Reader DC.

Camera locations per KHL technical regulations

Camera locations per KHL technical regulations Camera locations per KHL technical regulations Camera locations per KHL technical regulations Camera locations per KHL technical regulations

Sports Video Judging

At all times, the sports judges felt the need for a reliable tool that would allow them to make an absolutely correct decision, dictated by the rules of the competition, fairness, logic and game situations. Eyesight, measuring tape and a stopwatch for a long time were the only assistants. But progress does not stand still and to the aid came photo-finish. For a long time it was the only complex technical means to determine the winner in various sports. But photo finish cannot be used in team sports. And using it is hardly convenient. However the idea of filming to make an objective decision was interesting and productive.

So it was only natural that video-recording became the tool for analysis of controversial issues. The process of rendering decisions based on the video and all the technical aspects associated with it became known as sports video judging.


Scoreboard Controllers

The rules governing team sports in addition to describing the gameplay also deal with procedural aspects.

All team sports keep score, and, as a rule, clearly set time limits for the various parts of the process.

Simply put, there is the duration of the game as a whole and its parts, as well as penalties, if they exist, and in some sports attack time.

In the past special judges with stopwatches kept track of game process timing.

To understand how difficult it is, let's imagine the following situation in ice hockey: Team A player is penalized for 2 minutes. After 30 seconds another player from the same team is penalized. 50 seconds later a player from team B goes to the penalty box and so on…

To control the penalty box timing for each player together with the game period time becomes quite a task!


About Harddrive

What do we do with old hard drives that litter the warehouse?

Among the old huge, slow and heavy disk which where once insanely expensive, particularly stood out Micropolis 1991 (5.25, Full FH) SCSI hard drives.

There was a mischievous idea to test it for performance. We quickly found a SCSI controller with 8-bit FAST SCSI. Standard testing utility showed drive's brilliant performance and unmatched speed graph. I have not seen such speed in about 7 years. To be truthful, the initial speed of 8 and the final 3.7 megabytes /sec were unusual. But most importantly, the drive after 15 years proved to be workable! Its speed characteristics were just perfect in relation to the year of manufacture.

Test good disk

Back in 1997, this disc was selling for $4,500. Now USB FLASH with similar characteristics is $5. Progress!? Yes, but there is another side to all advantages.

Modern "spin" discs have very high read/write rate, huge volume and low price. This is the result of modern technology and algorithms of embedded software. The downside of this is that the drives have become less reliable and their speed performance graphs began to resemble a beard because of the huge and chaotic rate slowdowns. This is due to the fact that no hard drive platters are perfect. They have parts with unsatisfactory read-write performance which are bypassed by drive's firmware.

Test bad disk

The lower peak performance may be ten times lower than the average rate expected by user. From the point of view of the manufacturer, such speed-rate drops are not errors. From the operating system point of view, an error is a timed-out write/read operation of 5-20 seconds! As a result, the user has a "working" hard drive, which constantly falls behind write/read operations.


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