17. The method of claim 13 , wherein the first stage recognizer is triggered to turn on and send the signal based on the speaker-specific information.
13. A method comprising: receiving, by a computing device, a signal from a first stage recognizer based on recognition of an acoustic input signal and classification of portions of the acoustic input signal into a classification in a plurality of classifications using a first speech recognition algorithm, the first stage recognizer being configured to recognize the acoustic input signal in an always on mode; activating, by the computing device, the second stage recognizer upon receiving the signal to recognize the acoustic input signal, the second stage recognizer configured to use a second speech recognition algorithm; identifying, by the computing device, a user that is speaking based on the acoustic input signal; determining, by the computing device, speaker-specific information previously stored for the user; determining, by the computing device, a response to the recognized acoustic input signal based on the speaker-specific information; determining, by the computing device, if the response should be output based on a ranking of the response; and outputting, by the computing device, the response if it is determined the response should be output.