CBS offering out-of-market signals via HD Radio multicast, GM serves up in-car Wi-fi, Liberty buys into World Space and RadioDNS links broadcast with Web.
Four of what are described as the group's most listened to stations will be carried as HD2 and HD3 signals over CBS FM stations in other markets.
General Motors says it will permit Wi-fi connection of multiple in car devices to mobile 3G broadband services as a dealer installed option on select models across Buick, Cadillac, Chevy and GM product lines.
Liberty Media is a diverse group that controls satcaster DirecTV and also counts a substantial interest in Sirius XM satellite radio among its many holdings.
IBOC Across America
There are 24 stations in the Palmetto State broadcasting 42 HD Radio channels.
Eye on IBOC
RadioDNS is really about combining the simplicity and convenience of local, over-the-air delivery of audio content with Web-linked interactivity, all without continuous consumption of bandwidth associated with streaming audio services.