Missed your reply. Incorrect time applied somewhere enroute.
Friend who attends standards meetings for codecs says 2kbps
by tokenizing speech components.
With 16QAM that's what 500Hz?
Competitive with high speed CW :-)
-Bob
John Graves wrote:
I am not good at the math but with G.723 you can get voice down to
about 5 kbps without a wrapper. So with Quad modulation, what baud
rate are we looking at? Does that translate to a baud of 1.25 kbps?
Can't we get that into a 3khz window...That's all modems are looking
into???
John
WB1EHL
At 03:24 PM 2/13/2004 -0500, tongaloa wrote:
It would be kind of fun to mess around with 6kc-10kc bandwidth digital
modes. Would take up no more space than the HiFi SSB. HF 16 QAM
anyone?
jhgraves@gis.net wrote:
Given the high level of concern for broadband SSB shown on the list
recently, I thought it resonable to make the following proposition. As
we all know, the width of a CW signal increases as a function of the
switching speed. Given that high speed CW is therefore occupying a
larger bandwidth that I at 5 wpm, should there not be some quiet corner
devoted solely to slow speed CW. We could then operate quietly and
efficiently, and feel good about only occupying a proper amount of
bandwidth.
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John Graves
Dynamic Devices, Inc.
781-245-9100
We make your data, data and voice, and data, voice and video
connections happen.... easily!
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