Hi Sebastien,
The M17 project
It was commented on RepeaterBuilder, what does the mode 3200 offer
in improving the low signal performance over the current 4800 bits/sec
commercial offerings?
I thought, that's very true. If they (M17) used say the 700 Codec2
mode, with the added callsign data Src & Dest etc. perhaps the packet
size could be well down, perhaps 1000 bits/sec. Surely this would
improve the low signal performance.
AI modes (LPCnet)
Are they needed at this point or is this experimentation, awaiting
newer hardware? Note: Apple (Inc) are looking at adding the SIMD
extended instructions into the ARM architecture for their "pad"
and cell-phone range and, note AND, replacing the CPU to ARM in their
desktop systems!
========== Right now ==========
I'd like to see:
1) Adapt "dudestar" and "droidstar" to use the current FreeDV API.
(minus the AI modes)
2) Adapt the above two apps to use other FreeDV modes, perhaps even 450.
Does this make cents?
Alan VK2ZIW
On Tue, 17 Nov 2020 15:59:20 +0100, Sebastien F4GRX wrote
> hello
>
> m17 looks like an embedded project that will not be able to use the
> last AI powered but resource hungry modes, because they only use a
> STM32 in their handheld.
>
> Moreover their goal does not look like to reduce the used bandwidth
> or work HF DX, but to provide clear audio that competes with
> proprietary solutions on VHF and UHF.
>
> So is it really bad if they only use the the old but lightweight modes?
>
> For me at least it makes a lot of sense.
>
> Sebastien
>
> Le 17/11/2020 à 02:38, Al Beard via Freetel-codec2 a écrit :
> > Hi,
> >
> > Adapting "dudestar" to use the latest Codec2 library is proving
> > difficult for me, a "hacker" at best.
> >
> > I'd really like to do this as I'd be unhappy with the M17 project
> > being limited to only the Codec2 modes 3200 and 1600.
> >
> > C++ "Scope" problems.
> >
> > Alan VK2ZIW
> >
> > On Tue, 17 Nov 2020 09:52:40 +1000, Al Beard via Freetel-codec2 wrote
> >> Hi guys,
> >>
> >> The "dudestar" app https://github.com/nostar/dudestar
> >>
> >> Makes use of the 3200 mode from 2010 to be compatible with the M17
> >> project.
> >>
> >> Can the "dudestar" software in the "Voice & Data" mode be changed to
> >> use the lower bit-rate modes such as 700 or even 450?
> >>
> >> To keep the internet packet format the same, in this V&D mode just
> >> have more "space" for data.
> >>
> >> As it stands, in the "Type" field bits, there is provision for encryption.
> >> It's been commented that "encryption" should be OUT. This frees up
> >> the bits for more vocoder types.
> >>
> >> Will an app such as this and "DROIDstar" encourage "over the
> >> internet" experimentation with alternate vocoders?
> >>
> >> BTW: The 3200 mode sounds quite good as long as one's mic audio level
> >> is adjusted down below clipping. (Use the O/S volume control app)
> >>
> >> (and the background noise level is low) (lessons from my laptop
> >> internal mic that "hears" the CPU fan very well)
> >>
> >> ---------------------------------------------------
> >> Alan VK2ZIW
> >> Before the Big Bang, God, Sela.
> >> OpenWebMail 2.53, nothing in the cloud.
> >>
> >> _______________________________________________
> >> Freetel-codec2 mailing list
> >> [email protected]
> >> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
> >
> > ---------------------------------------------------
> > Alan VK2ZIW
> > Before the Big Bang, God, Sela.
> > OpenWebMail 2.53, nothing in the cloud.
> >
> >
> >
> > _______________________________________________
> > Freetel-codec2 mailing list
> > [email protected]
> > https://lists.sourceforge.net/lists/listinfo/freetel-codec2
>
> _______________________________________________
> Freetel-codec2 mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/freetel-codec2
---------------------------------------------------
Alan VK2ZIW
Before the Big Bang, God, Sela.
OpenWebMail 2.53, nothing in the cloud.
_______________________________________________
Freetel-codec2 mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/freetel-codec2
