In the application, Apple describes the use of the iPhone as a self-configuring universal remote for your home entertainment system. Specifically, they suggest using the iPhone's camera to take a photo of your existing remote, and then comparing that photo to a database of known remotes.
The method may begin by obtaining an input that may be used to identify the electronic device that is to be controlled, such as by using image processing techniques to compare the captured image against a database of known devices.
Apple acknowledges the iPhone in question would also need IR transmission capabilities. The patent application is dated from 2010.
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