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Low Precision Floating Point for Signal Processing

IP.com Disclosure Number: IPCOM000052271D
Original Publication Date: 1981-May-01
Included in the Prior Art Database: 2005-Feb-11

Publishing Venue

IBM

Related People

Authors:
Todd, SJP [+details]

Abstract

This invention relates to a machine implementable arithmetic method based on logarithmic representation of numbers. It uses conventional add/subtract to implement multiply/divide and table look-up for add/subtract. The approach is an extension of that of Swartzlander and Gilbert, "Arithmetic for Tomography," IEEE Transactions on Computers 29, 341-353 (May 1980). The object of the method is to improve the useful signal-to-noise ratio and in reducing table sizes needed. The method has application where the use of fixed point is complicated by dynamic range requirements, and where fairly poor signal-to-noise ratio is acceptable.