MODULATION INDEX

Terrestrial radio can use program associated data as one very important tool towards offering new features to its content. It can be used in several forms. Analog FM transmission is capable of PAD through RDS transmission and RDS capable receivers. Many OEM automotive receivers already receive RDS, so automotive receiver penetration is definitely increasing, with the added benefit that the user is usually not required to do anything to the receiver to see this program associated data, unlike satellite radio on the same receiver. The most popular portable media player, the Apple iPod® now has an FM receiver available that is RDS capable, and the Microsoft Zune™ includes an FM RDS receiver. Several mobile phones with FM receivers from SonyEricsson and Nokia also display RDS. Digital AM and FM transmission with iBiquity HD-Radio is also PAD compatible. Other uses of PAD for terrestrial radio include Now Playing information for Internet streaming web sites, large format in-studio signs and..

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