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Re: [RTTY] 2 tone vs MMTTY

To: RTTY Reflector <rtty@contesting.com>
Subject: Re: [RTTY] 2 tone vs MMTTY
From: Kok Chen <chen@mac.com>
Date: Wed, 11 Jun 2014 21:27:27 -0700
List-post: <rtty@contesting.com">mailto:rtty@contesting.com>
On Jun 11, 2014, at 9:00 PM, Ed Muns wrote:

>  OTOH, that part of the decoding algorithm is probably key to
> 2Tone's excellent copy of weak and other marginal signals.

The trade off between a "low-latency crummy decoder" and a "high-latency better 
decoder" can be solved if you allow new GUI elements into your modem.

Run two demodulators.  The low-latency one prints first.  The high-latency 
decoder then overprints over those characters when they become available from 
the high latency decoder.  This way, your eyes do not need to switch its focus 
between two windows.  Strong signals will print correctly right away.  

Variations on this theme include using two different color fonts that produces 
a third color when the two decoders agree, etc.

I had discussed this technique before with G3YYD for making even longer latency 
decoders tolerable (for example, ones that corrects bit clocks by using 
"future" bits for pseudo-synchronous clocking).  But David is hobbled by the 
existing modem user interfaces.

73
Chen, W7AY

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