Program-associated data
Program Associated Data (PAD) or Program Service Data (PSD) is a concept related to broadcasting which consists of a number of different fields or streams which are displayed on many HD Radio & satellite radio receivers in order to describe the program being transmitted, including different informations such as:
- song title.
- program title.
- artist name.
- album name.
- music genre.
This is intended to be seen by the listener as the program is heard.
The HD radio & satellite radio systems provides a data path for this programming data to be delivered and read by the listener as part of visual display in near real time. HD radio & satellite radio receivers should provide PAD decoders and visual screens for displaying the information in a correct way.
A lot of local radios which are transmitting in digital, are using PAD capacity to increase the value of the service they are giving.
This is different from Radio Data System (RDS).
| Analog and digital audio broadcasting | |
|---|---|
| Terrestrial radio modulation | AM • FM • COFDM |
| Terrestrial frequency allocations | LW • MW (MF) • SW (HF) • VHF • L band |
| Satellite frequency allocations | L band • S band • Ku band |
| Hidden signals | AMSS • DirectBand • PAD • RDS/RBDS • SCA/SCMO |
| Codecs | AAC •
Musicam • |
| Terrestrial digital systems | DAB/DAB+ • DRM/DRM Plus • HD Radio • FMeXtra • CAM-D |
| Satellite digital systems | SDR • DVB-SH • DAB-S • DMB-S • ADR |
| Satellite commercial radio providers | Sirius • WorldSpace • XM |
| Related topics | Digital radio • Audio processing • History of radio • International broadcasting |
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