Closed captioning is the technology used to embed text or other information in an NTSC television broadcast (North America, Japan, some of South America). It is typically a transcription of the broadcast audio for the benefit of hearing impaired viewers. No doubt, you’ve all seen closed captions displayed on a TV, but how does it work? This project will explain how closed captioning technology works and then show you how you can decode and display the data using your Arduino and a Video Experimenter shield. There a lot to learn here, so be patient! First, you can take a look at a video showing this capability, then keep reading to learn how it works.

Via and Source: Nootropic