1. A method of performing speech recognition, the method being performed by an automated speech recognition system, the method comprising: receiving, by the automated speech recognition system, audio data and context data associated with the audio data, wherein the received context data indicates a current context of a device when the device captured the audio data; identifying, by the automated speech recognition system, a topic based on a comparison of the received context data with second context data indicating a previous context of a device, wherein identifying the topic includes: selecting, by the automated speech recognition system, a term based on the comparison between the received context data and the second context data; and in response to selecting the term, selecting, by the automated speech recognition system and as the identified topic, a topic that is associated with the selected term; based on identifying the topic, adjusting, by the automated speech recognition system, a language model based on the identified topic to adjust a likelihood that the language model indicates for one or more terms associated with the topic; determining, by the automated speech recognition system, a transcription of the audio data using the adjusted language model; and outputting, by the automated speech recognition system, the transcription determined using the adjusted language model, the transcription being output as a speech recognition output of the automated speech recognition system.
8. The method of claim 1 , wherein receiving audio data includes: receiving, at a first point in time, audio data that represents speech of a user as obtained by one of a plurality of client devices on which an account associated with the user is accessed; and wherein selecting the term includes: selecting the term from among terms that are each associated with data obtained by one of the plurality of client devices that reflects (i) input received through a user interface of the client device before the first point in time, or (ii) content which, before the first point in time, was associated the user's account and accessible to one or more of the plurality of client devices.