Exponential calculation device and decoding device
US6363407B1 · kind B1 · utility
9Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2001 |
| Grant date | Mar 26, 2002 |
| Priority date | — |
| Expiry date | Aug 14, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/0212
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A device of the present invention is an exponential calculation device for calculating x{circumflex over ( )}(a/b) (where a and b are each an integer constant) for a given input value of x. The device includes: an input control section for outputting a value of x′, wherein x′=x when x≦A (where A is a threshold value within a variable range of x) and x′=x/2{circumflex over ( )}b when x>A; a core section for outputting a value of z′=x′{circumflex over ( )}(a/b); and an output control section for outputting a value of z, wherein z=z′ when x≦A and z=z′*2{circumflex over ( )}a when x>A.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.