To verify the proposed method, we implemented and evaluated it with a tablet. Tables 1 and 2 show the parameters used in the evaluation. Figure 9 shows the synchronous error time for the distance between the TV and mobile device. We measured the synchronous error time five times for the same distance, and extended the distance by 0.25 m. Most measurement values are within plus or minus 0.03 sec. We
calculated the average of the absolute values of the measurement values for the same distance. The averages are about 0.01-0.02 sec. regardless of the distance. From these results, we generally confirmed the frame-accurate synchronization by capturing the tablet screen.