Radio Data System
Videos
Radio Data System is a communications protocol standard for embedding small amounts of digital information in conventional FM radio broadcasts. RDS standardizes several types of information transmitte
A Radio Data System – Traffic Message Channel (RDS-TMC) receiver (left) attached to a TomTom navigation system to integrate real-time traffic data into the navigation.
Radio Data System display of an FM Radio station from Spain.
An example of RT RDS on Los Angeles' KFSH-FM
PI A206
HD Radio
Videos
HD Radio is a trademark for in-band on-channel digital radio broadcast technology. HD radio generally simulcasts an existing analog radio station in digital format with less noise and with additional
Radio Data System
…different, with receivers able to work with either system with only minor inconsistencies in the displayed data. RDS is only used on analog stations. The HD Radio equivalent is Program-associated data (PAD), now called Program service data (PSD). Both versions carry data at 1,187.5 bits per second (about 1.2…
An example of information displayed by an AM HD station locking.
HD Radio transmitter
Spectrum of a HD Radio station as shown by a RTL-SDR USB device. The usual bandwidth of a regular FM station is visible as the marker width in the top image.
HD‑1 signal on KOST 103.5 FM in a Volkswagen RCD‑510 receiver