| 摘要 |
A method of automatically controlling bandwidth of a waveform equalizer in a DVD (Digital Video Disc) reproducing apparatus. The DVD reproducing apparatus includes an RF amplifier having the waveform equalizer of which a bandwidth is determined by a bandwidth control signal, and a digital signal processor for demodulating an EFM signal equalized by the RF amplifier. A system controller of the DVD apparatus checks an error cycle of an error signal received from the digital signal processor for a predetermined count cycle, while varying the bandwidth control signal step by step, so as to calculate an error rate according to the bandwidth control signal. Thereafter, the DVD apparatus outputs the bandwidth control signal having a minimum error rate out of the calculated error rates to the RF amplifier, thereby minimizing an error rate during data reproduction. |
