Title:
CALCULATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/135355
Kind Code:
A1
Abstract:
This calculation circuit is provided with: a LUT generation circuit (1) that, when coefficients c[n] (n=1, ···, N) are divided into pairs, outputs a value calculated for each of the pairs; and a distribution calculation circuit (2-m) that calculates, for each pair of M pairs of data pieces x[m, n] in parallel, a product-sum calculation value z[m] obtained by multiplying, respectively with the coefficients c[n], data pieces x[m, n] in a data set X[m] (m=1, ···, M) including the M pairs and by summing the multiplied values. The distribution calculation circuit (2-m) is formed of: a plurality of binomial distribution calculation circuits that calculate binomial product-sum calculation values for each pair, on the basis of a value obtained by dividing N data sets x[m, n] corresponding to the distribution calculation circuit into pairs, a value obtained by dividing the coefficients c[n] into pairs, and the value calculated by the LUT generation circuit (1); a summing circuit that sums the calculated values; and a digit adjustment circuit that adjusts the number of digits after a decimal point in the summed result to a predetermined number of digits after a decimal point.
Inventors:
KAWAI KENJI (JP)
AWATA RYO (JP)
TAKEI KAZUHITO (JP)
IIZUKA MASAAKI (JP)
AWATA RYO (JP)
TAKEI KAZUHITO (JP)
IIZUKA MASAAKI (JP)
Application Number:
PCT/JP2018/046496
Publication Date:
July 11, 2019
Filing Date:
December 18, 2018
Export Citation:
Assignee:
NTT ELECTRONICS CORP (JP)
NIPPON TELEGRAPH & TELEPHONE (JP)
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
G06F17/10; G06F7/57
Foreign References:
| JP2004171263A | 2004-06-17 | |||
| US20050201457A1 | 2005-09-15 | |||
| JP2000132539A | 2000-05-12 |
Other References:
YI, RU ET AL.: "Implementation Consideration of Linear-Phase Delay Digital Filter Using Distributed Arithmetic on FPGA", JOINT RESEARCH PRESENTATION OF TOCHIGI AND GUNMA BRANCHES OF THE INSTITUTE OF ELECTRICAL ENGINEERS OF JAPAN, 29 February 2012 (2012-02-29), pages 18 - 20 , 25-26, XP055619872, [retrieved on 20190319]
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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