radio broadcast data system (USA) (RBDS)

Radio Broadcast Data System (RBDS) is the name for the US Radio Data System( RDS).

The two standards are almost identical and differ only slightly in the labeling of the 31 music channels and in other program formatting.

Both radio text systems use a 57 kHzsubcarrier over which data is transmitted at 1.18 kbit/s. The 57 kHz subcarrier frequency corresponds to the third harmonic of the pilot tone. This results in no interference or intermodulation with the pilot tone or the stereo signal at 38 kHz.