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Re: HF Digital Voice Modulation modes
Obrigado Rafael!
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This is very interesting, and using Web standards! I'll take a look. Abra?os, Rafael Diniz On 10/21/21 5:04 PM, Rafael Pinto [PU1OWL] wrote:
Rafael, |
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Re: EI9GQ 16 Watt Linear Amp Build
#homebrew
#linear-amp
Well done! ?So the input to your 2n2219a is your homebrew? Did you have to lower the output of the 510 at that point? Or is the input to your lovely amp starting someplace else?
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Re: Trouble ahead
On my 2018 trip to Dayton, the flight entertainment system rebooted. I could see it was booting up in linux. I pressed on random buttons and it landed me in the admin login, there seemed to be no password. I wandered around a bit on the disk system, it was remote mounted and then I went back to my "Radio Porn" (flipping old QSTs on the laptop). - f On Fri, Oct 22, 2021, 3:16 AM Jerry Gaffke via <jgaffke=[email protected]> wrote: Tom has a good memory! |
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Re: Trouble ahead
Tom has a good memory!
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On Thu, Oct 21, 2021 at 08:12 AM, Tom, wb6b wrote: I seem to remember something about a hacker (while actually traveling on the plane!) decided it would be cool to connect his laptop the the in-flight entertainment system data bus and discovered he could hack his way into the flight deck control systems. |
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Re: Trouble ahead
On Thu, Oct 21, 2021 at 07:05 AM, Evan Hand wrote:
You are not thinking devious enough:? IF you insert a smart chip in the I2C line inside of the chip it MIGHT be possible to use that link to take control of the rig's MPC and then use that device to link into the computer through the CAT channel.?I seem to remember something about a hacker (while actually traveling on the plane!) decided it would be cool to connect his laptop the the in-flight entertainment system data bus and discovered he could hack his way into the flight deck control systems. Great. Glad he (and everyone else) lived to tell about it. If the story is true, hope that prompted an in-flight firewall to be added to avionics systems.? Tom, wb6b |
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Re: HF Digital Voice Modulation modes
On Wed, Oct 20, 2021 at 07:32 PM, Tom, wb6b wrote:
However there are other prebuilt examples that can be downloaded trained and run for practice. If I find anything interesting in my notes from when I discovered this Amazon service existed I can add some links.It is cool that we have come to the point where there a lot of plug-n-play module that can just be downloaded, and maybe modify a bit with your own training data, and do useful things. Were are entering the Arduino IDE stage of AI/ML development. Here is a web site that was a very popular read for the folks trying to learn AI/ML in the "assembly language" days of AI. Probably worth a cursory look at?gradient descent and?back propagation. These are the core of how these systems train. Worth it to try to get a feel for what goes on under the covers, not just the drag and drop pre-made models step we are now entering. Not that the phase we are entering is bad. Its good. I think the snake oil salesmen that tried to promote AI as magic solutions for everything have largely been exposed and gone away? Also, in the early phase the nonlinear curve that seems to let the "neurons" produce "arbitrary" functions based on the sum of many inputs to a neuron was either an exponential function or based on calculating tangents. Seems very costly for something that is calculated over and over again while a computer preforms a big loop stepping through each "neuron" one by one recalculating the latest value. But the "sigmoid" functions were convenient for the academic early research stage of ML. Later someone tried a nonlinear function based on a half wave rectifier. Really fast and easy to calculate and seems to work as well as the computationally complex sigmoid functions. Anyway, I'm prompted to dig back in and start coming back up to speed so I can try some of these new models. Tom, wb6b |
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Re: HF Digital Voice Modulation modes
On Thu, Oct 21, 2021 at 06:30 AM, Rafael Diniz wrote:
Certainly yes. An AI NN trained for such purpose could reconstruct aHi Rafael, Thanks, that is encouraging. The noise aspect is interesting. I think I ran across a paper with some experiments on AI/ML noise reduction. Fortunately Ham Radio is only supposed to be used for speech. Since the AI voice compression is only trained on speech, wonder if it breaks down went presented with things like music. Funny, that could be a great boon to amateur radio. A transmitter that is of no use to the people that seem to think jamming and playing music on the ham bands it just a great way to spend their time. Tom, wb6b |
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Re: Trouble ahead
You are not thinking devious enough:? IF you insert a smart chip in the I2C line inside of the chip it MIGHT be possible to use that link to take control of the rig's MPC and then use that device to link into the computer through the CAT channel.?
Not likely but it could be possible.? Similar things have been done in industrial control systems to break things. Enough of the speculation on my part.? I will now mute the topic. 73 Evan AC9TU |
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Re: HF Digital Voice Modulation modes
Hi Farhan,
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Do you have any "traditional" automatic CW decoder reference for performance comparison? I hope to get something better than what exists, otherwise it does not make any sense. Rafael On 10/21/21 3:10 AM, Ashhar Farhan wrote:
Rafael, |
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Re: HF Digital Voice Modulation modes
Hi Tom,
1) Regarding the AI image compression. Is it possible that there wouldI never got such strange behavior with HIFIC, but it is a matter of us trying out. Indeed, the performance is not orders of magnitude better than VVC (H.266) - by reading the papers. But in my experiences, with the lower bitrate HIFIC (0.160 bpp) is better than state-of-the-art traditional image encoding (aka. VVC). Indeed, images look much better (do not look the PSNR thou). Use the? "hific-lo" model in (I'm using the CPU version in my old Lenovo T430, and for still images, you just need at least 16 GB ram to play with and get the results after less than 30s!): 2) Something I've toying around with and trying to find any possibleCertainly yes. An AI NN trained for such purpose could reconstruct a good quality voice from SSB quality "Donald Duck" analog voice. Noise is the most challenging thing here as far as I played with. I wonder how much it is going to drain my bank account setting up an:P In the university we have some nice GPUs to play with. If you really want to play with this, I bet nothing, as there will be many people offering you GPU access to play with such computer science edge stuff. Look forward to your paper.Yay! Cheers, Rafael |
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Re: Trouble ahead
Y'know... ...it COULD happen. All it takes is one more bonehead ruling by the FCC... -- Rich WB2GXM ------ Original message------ From: Max via Date: Thu, Oct 21, 2021 12:12 AM To: [email protected]; Cc: Subject:Re: [BITX20] Trouble ahead "Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads." I know you were joking, but HE11 NO !
On Wednesday, October 20, 2021, 07:21:18 PM CDT, Tom, wb6b > wrote:
On Wed, Oct 20, 2021 at 03:40 PM, Jim Sheldon wrote: Well, the architecture of that chip only generates up to 3 simultaneous RF frequencies and nothing else.Maybe one of the big internet companies will see a way to make a profit and produce?Si5351a like chips in volume at unbeatable low prices.? Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads.? Could be a new privatized ad supported amateur radio service. Tom, wb6b |
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Re: HF Digital Voice Modulation modes
This maybe an interesting quick read for those interested in AI/ML in the embedded space.
Article has links to a series of training videos.? There is also a NXP Connects coming up soon. EMEA Nov 9-10 | Americas Nov 10-11 | Asia-Pacific Nov 16-17 https://www.nxp.com/company/about-nxp/events/nxp-connects:NXP-CONNECTS Digikey, Arrow, Mouser are sponsors. (in the past,? NXP sold some of the boards used in the training sessions through supplier channels at discounted rates) Rgds, Gary |
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Re: Trouble ahead
"Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads." I know you were joking, but HE11 NO !
On Wednesday, October 20, 2021, 07:21:18 PM CDT, Tom, wb6b <wb6b@...> wrote:
On Wed, Oct 20, 2021 at 03:40 PM, Jim Sheldon wrote: Well, the architecture of that chip only generates up to 3 simultaneous RF frequencies and nothing else.Maybe one of the big internet companies will see a way to make a profit and produce?Si5351a like chips in volume at unbeatable low prices.? Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads.? Could be a new privatized ad supported amateur radio service. Tom, wb6b |
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Re: Trouble ahead
I'd rather pay more then to put up with more ad's ! Max KG4PID
On Wednesday, October 20, 2021, 08:18:32 PM CDT, Ken Hansen <ken@...> wrote:
Like an Amazon "Fire Tablet" with special offers - imagine if you could get a slightly cheaper Radio if you tolerated advertising on the bandscope/display between band changes and at power-up! LOL Ken, N2VIP > On Oct 20, 2021, at 20:21, Tom, wb6b <wb6b@...> wrote: > > Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads. > > Could be a new privatized ad supported amateur radio service. |
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Re: Trouble ahead
They have only one xtal there, same as bitx IF.
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At 21/10/2021, you wrote: There are reports of bitx randomly picking up radio rwanda... |
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Re: HF Digital Voice Modulation modes
On Wed, Oct 20, 2021 at 05:10 PM, Ashhar Farhan wrote:
It would be dandy if someone can write? a simple HelloWorld for us old timers to start using TensorFlow.Here is what Amazon offers for ML (AI) development. This is Amazon's getting started page. However there are other prebuilt examples that can be downloaded trained and run for practice. If I find anything interesting in my notes from when I discovered this Amazon service existed I can add some links. I seem to remember a basic step by step training course that let you work through examples, starting from very "simple" and let you progressively work your way up to more complex things.? There is a big learning curve and you need to get familiar with AWS. I know AWS but only at the beginning of the learning curve of the sagemaker service. I started to play a bit here but became involved with other priorities. The AI based speech compression that came up in these posts and the thoughts of things that might be possible by adapting that work to other uses is restoring my interest.? Tom, wb6b |
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Re: Trouble ahead
Like an Amazon "Fire Tablet" with special offers - imagine if you could get a slightly cheaper Radio if you tolerated advertising on the bandscope/display between band changes and at power-up! LOL
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Ken, N2VIP On Oct 20, 2021, at 20:21, Tom, wb6b <wb6b@...> wrote: |
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Re: Trouble ahead
There are reports of bitx randomly picking up radio rwanda... On Thu, Oct 21, 2021, 5:51 AM Tom, wb6b <wb6b@...> wrote: On Wed, Oct 20, 2021 at 03:40 PM, Jim Sheldon wrote: |
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Re: Trouble ahead
On Wed, Oct 20, 2021 at 03:40 PM, Jim Sheldon wrote:
Well, the architecture of that chip only generates up to 3 simultaneous RF frequencies and nothing else.Maybe one of the big internet companies will see a way to make a profit and produce?Si5351a like chips in volume at unbeatable low prices.? Every 15 minutes of having QSOs the chip will abruptly tune your rig to a radio advertising frequency and make you listen to ads.? Could be a new privatized ad supported amateur radio service. Tom, wb6b |
Rafael Pinto [PU1OWL]
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