[EMOXG] about Core 8 Emotion timing: sampling mechanism

Hi all,

as we have put nearly all issues on the table now, let me add one that I 
think should be included: the sampling mechanism.

Indeed, Requirement Core 8 Emotion timing includes "iv) a sampling 
mechanism providing values for variables at evenly spaced time 
intervals". There seemed to be some uncertainty what that is and what it 
should be needed for.

Actually, this requirement comes from the use case on "trace" annotation 
[1]. Those who know the work of Roddy Cowie et al. in Belfast know their 
Feeltrace family of tools -- using a mouse and a (1- or 2-d) slider, you 
indicate the amount of some scale value as it changes over time, while 
watching a video containing emotional material. The challenge in this 
kind of use case is to represent the continuous ratings as they develop 
over time.

One simple solution is a "sampling" mechanism, recording a value, e.g., 
every 10 ms.

Now, starting from a (constant) scale representation as I had suggested 
earlier [2]:

<emotion>
      <dimensions set="Arousal-and-Valence">
          <arousal value="0.5"/>
          <valence value="0.3"/>
      </dimensions>
</emotion>

We could now add a trace that shows, e.g., a sudden increase in arousal:

<emotion>
      <dimensions set="Arousal-and-Valence">
          <arousal>
              <trace freq="10ms">
              0.1 0.1 0.2 0.2 0.2 0.5 0.7 0.7 0.8 0.7 0.7
              </trace>
          </arousal>
          <valence>
              <trace freq="10ms">
              0.3 0.3 0.4 0.3 0.3 0.3 0.2 0.3 0.3 0.3 0.2
              </trace>
          </valence>
      </dimensions>
</emotion>


Just to make the concept clear and to throw this into the discussion...

Best wishes,
Marc



[1] http://www.w3.org/2005/Incubator/emotion/XGR-emotion/#usecase1d
[2] http://lists.w3.org/Archives/Public/public-xg-emotion/2008Jul/0008.html

-- 
Dr. Marc Schröder, Senior Researcher at DFKI GmbH
Coordinator EU FP7 Project SEMAINE http://www.semaine-project.eu
Chair W3C Emotion ML Incubator http://www.w3.org/2005/Incubator/emotion
Portal Editor http://emotion-research.net
Team Leader DFKI Speech Group http://mary.dfki.de
Project Leader DFG project PAVOQUE http://mary.dfki.de/pavoque

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Received on Tuesday, 19 August 2008 08:31:00 UTC