(Program Associated Data) If you have an HD radio in many newer vehicles, they will display album art, song title/artist, and what's upcoming. For example; many NPR stations with HD will display a logo unique to that particular program, whereas many music stations, display album art for music stations, or station logos when a jock is talking. SXM features some sort of PAD logos/information for all their various channels.What’s HD-PAD data?
Here's some discussion of PAD data from Radio World:
PADding the truth
PADding the truth May 1, 2005 12:00 PM The ability to display program-associated data (PAD), such as artist name and song title, is a common quest whether it is used for RBDS, a station’s website or HD Radio. This information is already stored in the automation system, so it should be an easy...