| 摘要 |
<p>DIGITAL FILTER BANK A digital filter bank which has a discrete cosine transform section and a polyphase network section has the polyphase network section configured with a plurality of single input-double output digital filters. The filters have one of their outputs independent of their present input signal. This permits a single multiplier-accumulator to use a "memory swapping" procedure to accumulate all the requisite information from a complementary pair of the filters and to perform the necessary operations on it to compute an output value, while clearing the accumulator only once each sampling period.</p> |
