On May 17, 2007, Interoperable Technologies, a company formed by XM and Sirius to develop interoperatble radios, had a patent application disclosed for a radio receiver with a detachable controller. The controller periodically performs an authorization process with the receiver. Once authorized, the receiver sends the controller an enhance or reduce set of metadata, such as song titles and artists.
Why do this? Separating the receiver and controller allows greater flexibility in where the controller (user interface) is mounted, because it can be smaller. This is nothing new. The authorization process is key, allowing only authorized users to access the information, thus avoiding any copyright issues.
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