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<font size=3>But,Mark, your movie analogy only considers the visual
system -- each sense had its own throughput time, plus we must consider
the "decision making" time between aircraft movement and then
the later stick movement reacting to that aircraft movement...it gets
very complicated very fast -- good thing we don't have to think through
every little stick input before we make it. It only takes about 2
or 3 seconds to "guide an aircraft into premature impact with
terraine"...<br><br>
At 01:28 PM 7/9/2010, you wrote:<br>
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It’s a good question, but I think the base number starts at zero.
Meaning we’re comparing NO latency with some latency. I.e. 0 -11,
or 0 – 14 or 0 – 250. No delay is obviously the
goal…though clearly impractical. The question is at what
point are we able to notice the latency.<br>
<br>
I think the movie industry gives us a reasonable benchmark to work
with, in that movie frames are 30ms apart and we’re generally unable to
discern any break. There are faster systems for film that
with studies are considered “smoother” but I believe below 15ms there was
little perceivable difference (that was 72FPS if I recall)<br>
<br>
Time to go do some research…or not.<br>
<br>
<br>
<br>
<b>Mark Atwood<br>
Paragon Consulting, Inc.</b> <b>|</b> President<br>
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124 <br>
Phone: 440.684.3101 x102 <b>|</b> Fax: 440.684.3102<br>
<a href="mailto:mark.atwood@paragon-inc.com">
mark.atwood@paragon-inc.com</a> <b>|</b>
<a href="http://www.paragon-inc.com/" eudora="autourl">
www.paragon-inc.com</a><br>
<br>
<b>From:</b> nsrca-discussion-bounces@lists.nsrca.org
[<a href="mailto:nsrca-discussion-bounces@lists.nsrca.org" eudora="autourl">
mailto:nsrca-discussion-bounces@lists.nsrca.org</a>] <b>On Behalf Of
</b>Bill's Email<br>
<b>Sent:</b> Friday, July 09, 2010 12:01 PM<br>
<b>To:</b> General pattern discussion<br>
<b>Subject:</b> Re: [NSRCA-discussion] S.bus<br>
<br>
The next question then becomes, at what level can we perceive a
difference in performance? In other words, can we really perceive a
difference between 7ms and 14ms latency? I will not argue that large
differences are readily perceptible (25 versus 250), but what about
smaller differences. How large of a difference does there need to be and
is there a threshold below which it does not really matter?<br><br>
<br><br>
Phil Spelt wrote: <br>
As a Psychologist, I agree with you, Bill. As an R/C pattern
jockey, I will only point out that the electronic latency is ADDED TO the
wet-ware latency...<br><br>
Thus, your last statement is true, indeed!<br><br>
At 11:19 AM 7/9/2010, you wrote:<br><br>
I am amused by discussions about latency. We have long discussions about
the perceived advantages of single digit differences in system latency
while ignoring the fact that the average human reaction time (call it
organic latency) is around 250 milliseconds. <br><br>
I guess you can argue that since we are inherently so slow we need all
the electronic help we can get!! <br><br>
<br><br>
<br><br>
Jon Lowe wrote: <br><br>
There is a great article on latency here: <br><br>
<a href="http://www.rcmodelreviews.com/what_is_latency.shtml">
http://www.rcmodelreviews.com/what_is_latency.shtml</a><br><br>
A lot of people are hung up on transmitter/receiver latency numbers, and
don't see the whole picture. This gives as good a fact based write
up as any I've seen.<br><br>
Jon Lowe<br>
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<b><i>--> There are only two types of aircraft -- fighters and
targets.<br><br>
</i></b>Phil Spelt, Past President, Knox County Radio Control Society,
Inc.<br>
URL:
<a href="http://www.kcrctn.com/">http://www.kcrctn.com<br>
</a>AMA--1294, Scientific Leader Member SPA--177, Board
Member<br>
My URL:
<a href="http://mywebpages.comcast.net/%7Echuenkan/">
http://mywebpages.comcast.net/~chuenkan/<br>
</a> (865) 435-1476 v (865) 604-0541
c <br><br>
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<b><i>--><font face="Arial, Helvetica" size=3 color="#800000">There
are only two types of aircraft -- fighters and targets.<br><br>
</i></b></font><font size=3>Phil Spelt, Past President, Knox County Radio
Control Society, Inc.<br>
URL:
<a href="http://www.kcrctn.com/" eudora="autourl">
http://www.kcrctn.com<br>
</a>AMA--1294, Scientific Leader Member SPA--177, Board
Member<br>
My URL:
<a href="http://mywebpages.comcast.net/~chuenkan/" eudora="autourl">
http://mywebpages.comcast.net/~chuenkan/<br>
</a> (865) 435-1476 v (865) 604-0541
c </font></body>
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