19. The method of claim 1 , wherein generating the log-linear language model comprises including, in the log-linear language model, features and corresponding weights representing one or more non-linguistic contextual factors; wherein training the log-linear language model comprises adjusting the weights based on training data indicating non-linguistic contextual factors.
19. The method of claim 1 , wherein generating the log-linear language model comprises including, in the log-linear language model, features and corresponding weights representing one or more non-linguistic contextual factors; wherein training the log-linear language model comprises adjusting the weights based on training data indicating non-linguistic contextual factors. 20. The method of claim 19 , wherein the non-linguistic contextual factors comprise a characteristic of at least one of a physical environment, a physical state of a device, an operating state of a device, or a speaker.