| 摘要 |
A digital demodulating apparatus includes a supplying unit that supplies power to each of circuit elements constituting a receiving unit that receives a signal, and a demodulating unit that demodulates the received signal. The apparatus further includes a correcting unit that corrects errors due to noises generated on a transmission path of the received signal; a calculating unit that calculates a value indicating the quantity of noises contained in the signal when the correcting unit corrects the errors; a judging unit that judges whether or not reception conditions of the received signal are good in a predetermined time period, based on values calculated by the calculating unit; and a reducing unit that reduces the power to be supplied to each circuit element by the supplying unit, when the judging unit decides that the reception conditions are good. The judging unit judges the reception conditions based on values repeatedly calculated by the calculating unit in the predetermined time period after a value calculated by the calculating unit indicates that the noises have become not more than a predetermined reference quantity. |
