Article View: comp.dsp
Article #4How to modify floating-point algorithm to fixed-point?
From: Yuhong Xiong
Date: Tue, 27 Oct 1992 18:08
Date: Tue, 27 Oct 1992 18:08
16 lines
1280 bytes
1280 bytes
I am currently working on coding MPEG audio algorithm on a fixed-point DSP chip. The original MPEG audio algorithm described in the Committee Draft is a floating-point algorithm. A lot of constant coefficients are double precision numbers. And in the psychoacoustic part of the algorithm, the computation of logarithmic and exponential functions (base 10) are required. Can anybody tell me how to modify the MPEG audio algorithm in order to fit into a fixed-point processor? How to realize logarithmic and exponential function on a fixed-point processor? Or the general way to convert a floating-point algorithm to fixed-point one. Any information is appreciated. Thanks in advance. -Yuhong yuhong@u.washington.edu
Technical Details
Message-ID:
<1992Oct27.180855.8049@u.washington.edu>Path:
arc1-ca.pugleaf.net!sparky!uunet!kithrup!hoptoad!pacbell.com!sgiblab!spool.mu.edu!decwrl!usenet.coe.montana.edu!news.u.washington.edu!hardy.u.washington.edu!yuhongShow Full Headers
Complete Article Headers
Newsgroups: comp.dsp Path: arc1-ca.pugleaf.net!sparky!uunet!kithrup!hoptoad!pacbell.com!sgiblab!spool.mu.edu!decwrl!usenet.coe.montana.edu!news.u.washington.edu!hardy.u.washington.edu!yuhong From: yuhong@hardy.u.washington.edu (Yuhong Xiong) Subject: How to modify floating-point algorithm to fixed-point? Message-ID: <1992Oct27.180855.8049@u.washington.edu> Sender: news@u.washington.edu (USENET News System) Reply-To: yuhong@u.washington.edu Organization: University of Washington, Seattle Date: Tue, 27 Oct 1992 18:08:55 GMT Lines: 16