发明名称 Signal processor for rapidly executing a predetermined calculation a plurality of times for typically carrying out FFT or inverse FFT.
摘要 <p>In a signal processor for processing zeroth through (N - l)-th input signal elements into zeroth through (N - l)-th output signal elements, the input elements are initially stored, as memorized data, in respective memory addresses of a memory arrangement (ll, l2) by a memory accessing arrangement which comprises a first address calculating arrangement (3ll, 32l) for calculating a first address for the memory addresses. A distance indicating arrangement (3l2, 322) is for indicating an address distance from the first address among the memory addresses. By using the first address and the address distance a second address is calculated by a second address calculating arrangement (3l3, 323). A pair of memorized data are read from the first and the second addresses as a pair of read data. A calculation performing circuit (20) is for performing a predetermined calculation on the pair of read data by using a coefficient read from a read-only memory (l4) to produce a pair of calculated data which are stored in the first and the second addresses as the memorized data. The calculation performing circuit performs the predetermined calculation a plurality of times to produce the output elements. </p>
申请公布号 EP0238807(A2) 申请公布日期 1987.09.30
申请号 EP19870101216 申请日期 1987.01.29
申请人 NEC CORPORATION 发明人 NISHITANI, TAKAO;KAWAKAMI, YUICHI;TANAKA, HIDEO;KURODA, ICHIRO
分类号 G06F17/14 主分类号 G06F17/14
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