Negative n-gram biasing

A system comprising:

• one or more computers;
• and
• a non-transitory computer-readable medium coupled to the one or more computers having instructions stored thereon, which, when executed by the one or more computers, cause the one or more computers to perform operations comprising:
• obtaining a candidate transcription that an automated speech recognizer generates for an utterance;
• determining a particular context associated with the utterance;
• determining that a particular n-gram that is included in the candidate transcription is included among a set of undesirable n-grams that is associated with the context;
• adjusting a speech recognition confidence score associated with the transcription based on determining that the particular n-gram that is included in the candidate transcription is included among the set of undesirable n-grams that is associated with the context;
• and
• determining whether to provide the candidate transcription for output based at least on the adjusted speech recognition confidence score.

A non-transitory computer storage device encoded with a computer program, the program comprising instructions that when executed by one or more computers cause the one or more computers to perform operations comprising:

• obtaining a candidate transcription that an automated speech recognizer generates for an utterance;
• determining a particular context associated with the utterance;
• determining that a particular n-gram that is included in the candidate transcription is included among a set of undesirable n-grams that is associated with the context;
• adjusting a speech recognition confidence score associated with the transcription based on determining that the particular n-gram that is included in the candidate transcription is included among the set of undesirable n-grams that is associated with the context;
• and
• determining whether to provide the candidate transcription for output based at least on the adjusted speech recognition confidence score.