Systems and methods may be provided for a CMOS RF antenna switch. Further, when the control information for the play back control is recorded in an information medium played back by the DVD reproducing apparatus, even when the car is travelling, the operation state of the DVD reproducing apparatus according to the control information is displayed on the display device by the superimposition display. In addition, a winner from the audience members is determined by the timing of a winning vote based on a percentage of the total number of votes cast for the contestant receiving the least number of votes. In addition, when only the most significant bits of the coefficients are being cycled through the register filter, any changing bits are prevented from being supplied to the updating circuit, so that the updating circuit performs no computation at all, rather than performing one that is discarded.