1. A method for performing a function in a mobile device, the method comprising: capturing a media sound from a sound output device external to the mobile device; extracting a sound feature from the captured media sound; determining the function to be performed in the mobile device by identifying at least one reference sound feature in a set of reference sound features based on the extracted sound feature, each reference sound feature in the set of reference sound features being associated with at least one of a plurality of media sounds and at least one of a plurality of functions; and performing the determined function in the mobile device.