Instant Video Share and View System for Ski-Jump Training Using Cheap Devices

In practices of ski-jumping, finishing stage of every practice cycle is hold on ski-jumping facility. In ski-jumping, it is generally said that taking-off dominates 80 percent of cause of flying distance. Therefore, practice of ski-jumping is a practice to perfume good taking-off. In practice held in ski-jumping facilities, a coach who is standing near jumping lamp records ski-jumper's each of jumps as video using a home-use video camera, and check whether last taking-off is ideal or not using the recorded video together with the jumper. However, in this way, jumper must climb jumping hill from breaking zone where is the lowest place to jumping-lamp which is mostly middle in the jumping hill. Horizontal distance between these two points are about 100 meters, and difference of altitude is more 50 meters. So climbing itself takes 15 minutes' walk, or 5 minutes even if jumper uses a ski-lift or a monorail to climb the hill. Therefore, checking and coaching is not efficient especially young and unskilled jumpers. In this paper, a system that shares taken video by home video camera instantly using tablet PCs located in breaking zone and side of jumping lamp will be presented. Using this system, the coach and the ski jumper who landed and stopped just before seconds can check the recorded video and effective coaching for unskilled jumpers is expected.