On the basic of analyzing the characteristics of Taekwondo competition,and in order to meet the practical needs of training for China male Taekwondo team,a video feedback sys- tem was developed and applied in the routine training and competition.

Some experiments were demonstrated on bistability using acousto optic (A O) devices (1D and 2D) and a driver which can provide frequency feedback, and succeeded in implementing bistability by means of frequency feedback.

Many experiences shows, in the motor skill learning, not always feeds back frequently, is more prompt, more is clear about well, There are many experiments from the overseas that prove“100% feedback frequency not the best instruction form”, and what actually have the best promote effect, there was no a consistent conclusion.

Digital algorithm research on radio frequency feedback in field programmable gate array;