NBTV Software

Software related to NBTV.

Re: NBTV Software

Postby Steve Anderson » Mon Jul 03, 2023 5:36 pm

The last link is interesting. (no audio), any further information?

Steve A.
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Steve Anderson
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Re: NBTV Software

Postby Harry Dalek » Sat Jul 08, 2023 7:59 pm

Steve Anderson wrote:The last link is interesting. (no audio), any further information?

Steve A.


More here Steve as i recall he explains the system in one of the earlier videos you might understand how he has done this

https://www.youtube.com/@kargaroc386/se ... %20line%20
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Re: NBTV Software

Postby GrantXTV » Thu Sep 26, 2024 5:29 am

Hi All,

I have setup a Get-hub account, both the NBTV_TX and the NBTV_RX files are there for version 2.9. Here is the Link: https://github.com/GrantXTV/NBTV-Project

There are bugs in the software, let me know if there is any issues getting the files and installing them?

In the last few day I have experimented with different ideas for the configurations for the modulator and the demodulator, I tested out the new design with sending to file and receiving back from file. As I still running my CPU full out at 100%, giving me a frame rate of about two video frames per second. Once I get some feedback from the encoder / decoder software that up on on GitHub, I will make the GNU Radio files available to limited number users to tryout. As it is not that easy do a full testing with my current hardware, until I can get a newer computer to work with.

Here are a few images showing the upper level of the GNU Radio modulator and the demodulator, with the other one showing testcard F, of the video coming back to the decoder. I was testing with mode 4 the uncompressed video mode at 120 x 96 x 8, 1/3, as I get a number of errors with modes 1 to 3, which is still been worked on. This new type of NBTV system designed for HF radio sky wave propagation, still very much a work in progress. Software was tested with Ubuntu Linux, using Gambas3 modules as the base layer, that will need to be install as well as the NBTV application.

Grant
Attachments
Demod_192_RX.pdf
Shows the GNU Radio NBTV demodulator
(26.76 KiB) Downloaded 157 times
Mod_192_TX.pdf
Shows the GNU Radio NBTV Modulator
(29.43 KiB) Downloaded 165 times
NBTV_RX.png
Images show testing the modulator and demodulator, sending to and from a file
Carrier to Noise.png
NBTV OFDM Performance vs VSB AM and FM modulation
Carrier to Noise.png (54.2 KiB) Viewed 3852 times
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