Another basic example of an SBC-based embedded system is a media player. This can involve both audio and audio-visual (AV) media formats. The difference between an SBC-based system being used to play back media with regular keyboard and mouse input, and an embedded SBC-based media player, is that in the latter's case the system can only ever be used for that purpose, with the software and user interface (physical- and software-wise) both optimized for media player use.
To this end, a software-based frontend has to be developed, along with a physical interface peripheral, using which the media player can be controlled. This could be something as simple as a series of switches connected to the GPIO pins, with a regular HDMI display for output. Alternatively, one could use a touch screen, although this would require a more complex driver setup...
