Hi All,
I have been working on a protocol that will allow around 125kbits/sec
data to be transferred in a 12.5khz channel.
However, it requires a S:N in the channel of around 35dB.
The potential use that I've thought of is for ATV, with a local 2/70cm
repeater that outputs reasonable power and
1 Does anybody have a feel for how many Hams are using PII and PIII for
keyboard QSOs?
2. SCS has a patent on these modes. What exactly is patented? I know the
hardware must be, and probably a software element like compression can
be patented, but what else?
3. In reference to 2, is it
Hello
Asmo OH3NNZ QRV friday 9.6.2006 17.00 - 20.00 UTC PAX2 mode. 14110.5
pse connects are welcome.
I am also QRV myself
73 de Tommi oh7jjt
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Hello Bob,
Itried all the Multipsk modes. It is
notone of them. It could be something as a PSK (BPSK or QPSK) mode at 200
or 300 bauds or perhaps a MSK mode.
73
Patrick
- Original Message -
From:
Andrew
O'Brien
To: digitalradio@yahoogroups.com
Sent:
Hello Sam,
If it interests anyone, then I can publish a specification for
peopleto look through?
I would be interested to read your specifications
and also interested to know what sort of compression system you propose
(Runlength, LZW, DFT...?).
Note for information: in Multipsk, I've
I'll take a crack at this since all my operation is either RTTY
(using a model 28ARS machine) or pactor ARQ using a TNC.
(1)Most are on pactor 1. very few on K2K on 2 or 3.
(2) the way it does what it does.
(3) not that I know of. A few years ago nextel (I think it was) did try
to patent
It would be of no use to the US hams as we are
limited to 5KHz on 2 meters.
Joe Ivey
W4JSI
- Original Message -
From:
Patrick Lindecker
To: digitalradio@yahoogroups.com
Sent: Thursday, June 08, 2006 4:46
PM
Subject: Re: [digitalradio] Digital Video
on
http://groups.yahoo.com/group/digitalradio/message/15115
Sam, this sounds veery interesting. A good lossless compression
would be Huffman coding, along with the one's that Patrick referenced. I
would be most interested in reading more.
73... Jon W1MNK
Yahoo!
http://groups.yahoo.com/group/digitalradio/message/15116
John, wow, a 28ARS. I remember repairing those, and 15s, 19s, 33s when I
worked for RCA Global Comm. A lifetime ago, it seems. I bet I could take
one apart and reassemble it :-)
On your (4), I wasn't aware of a PC implementation of P2
I dont think there will be a PC version for the same reason
there is no PC playing ARQ amtor or even pactor I ARQ.
The PC just cant keep up the timing required.
I have played with a amtor program but at best it was only 46%
of what the TNC was doing. And that was just going across
the room.
At
pse try again, sorry I missed u, Tommi and
Asmo...am very interested in PAX2 and haven't worked Europe
yet..
John
VE5MU
- Original Message -
From:
holopainen_tommi
To: digitalradio@yahoogroups.com
Sent: Thursday, June 08, 2006 11:28
AM
Subject:
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