ATSC transmitter from Parallax P2 microcontroller

Some home computers used to have RF video output. The P2 could bring that back with ATSC HDTV output.

Public Chat
Similar projects worth following
Transmitting ATSC using Gnuradio and a software defined radio is easy. This project is an investigation into transmitting a digital TV signal with only a microcontroller.

Status: working proof of concept

The P2 microcontroller has hardware for generating composite video. The chroma modulator feeds the internal 8 bit 320 MSPS DACs and can be used for RF signals as well.

For proof of concept, I used the Gnuradio ATSC transmitter blocks to add the forward error correction to the video data. The encoded symbols are saved onto a microSD card. The P2 microcontroller transfers the data from the microSD card to the 32MB ram on the P2 edge module. I thought that this was the easiest way to feed a sustained 33mbps into the P2. Well, for 6.19 seconds :) It works! And the 6 seconds of video plays in a loop, with some pixelization as it restarts.

Note: The spectrum is terribly dirty. (see plot) Please do not send this signal into an antenna.

Sends a 6 second loop video from a pre-generated bitstream.

Zip Archive - 24.10 MB - 01/24/2024 at 05:17


Enjoy this project?



Similar Projects

Does this project spark your interest?

Become a member to follow this project and never miss any updates