| 摘要 |
<p>A sampling frequency converter capable of obtaining data sampled by sampled pulses having a sampling frequency of 2-, 4-, or 8-fold of 44.1 kHz without using an over-sampling filter. Input data sampled by sampling pulses having a sampling frequency of 32 kHz is over-sampled by a 3-fold by a first over-sampling filter (6), and down-sampled by a one-half-fold by a first down-sampling (2) filter. One of input data sampled by sampling pulses having a sampling frequency of 48 kHz and the output of the first down-sampling filter is selected by a first selector (3). The output of the selector is over-sampled by a 147-fold by a second over-sampling filter (4), and down-sampled by a one-20th-fold by a second down-sampling filter (5). The output of the second down-sampling filter is down-sampled by one-half-, one-4th-, and one-8th-folds respectively by third (6), fourth (7), and fifth (8) down-sampling filters. One of the outputs of the second to fifth down-sampling filters is selected by a second selector (9).</p> |
