XM Radio is a satellite radio service that provides music channels to listeners who have paid for the service. The company was formed after the merger of Sirius Satellite Radio and XM Satellite Radio in 2008. XM focuses on the commercial market for music and entertainment and provides a variety of programming options. Some of the main services are XM Radio and eMusic Mobile. It also offers the service The Buzz, a music news portal.
XM Radio is digitally compressed and stored in audio library systems using industry-standard MPEG-1 Layer II at 384 kbit/s. Audio is further processed by Neural Audio processors before it is transmitted to the satellite. During this process, the AMBE codec from Digital Voice Systems and the CT-aacPlus codec from Coding Technologies are used.
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