The channel3 ESP8266 Analog Broadcast Television Interface allows users to connect an antenna to GPIO3/RX, tune their analog TV to Channel 3, and power on the ESP to broadcast signals. By utilizing the I2S bus and setting the output baud to 80 MHz, the ESP can transmit frequencies at 60 MHz on an 80 MHz bitclock, creating unique waveforms. The project includes tables for signal encoding, functions for modulation, and demo screens showcasing various features. The web interface allows users to control the demo screens and experiment with different color modulation. PAL modification enables PAL broadcasting with NTSC color information. Check out the original youtube video and a new video introducing color functionality.
https://github.com/cnlohr/channel3