Re: Update on GDF 2.0

From: Alois Schloegl <a.schloegl ***AT***>
Date: Sat, 29 Oct 2005 21:27:06 +0200
Subject: Re: Update on GDF 2.0
Newsgroups: tu-graz.biosig
Organization: University of Technology Graz
Message-id: <>
User-agent: Pan/ (As She Crawled Across the Table (Debian GNU/Linux))
References: <df3qp2$pl$>

Based on a suggestion, the physical dimension will be encoded as binary
code. The textual description can be avoided, and a more compressed
encoding can be used. 

A suggestions for including this idea in GDF 2.0 is described in the
latest version of the GDF2.0pre available at

The feasibility of this encoding has also been tested, through the
implementation in BioSig4OctMat (v 1.65) and BioSig4C++ (v 0.21). 

The encoding scheme of the File Exchange format (FEF) for vital signs will
be used. The encoding consists of 16 bits; the 5 LSB encode the decimal
factors, the remaining bits encode the units. 

The code tables are available in BioSig4OctMat Version 1.65 or higher
within the files 
biosig/doc/units.cvs and

The tables are also accessible through the CVS-Web interface.