8. A system comprising: a processor; a memory storing instructions for controlling the processor to perform steps comprising: identifying, in a database of utterances, first transcribed utterances and first un-transcribed utterances; identifying transcription candidate utterances from the first un-transcribed utterances; predicting likely recognition error utterances from the transcription candidate utterances; forwarding the likely recognition error utterances to a transcriber, to yield additional transcribed utterances; adding the additional transcribed utterances to the database of utterances, to yield an updated database of second transcribed utterances and second un-transcribed utterances; and if word accuracy has converged, modifying an automatic speech recognition system by providing both the second transcribed utterances and the second un-transcribed utterances to the automatic speech recognition system.
8. A system comprising: a processor; a memory storing instructions for controlling the processor to perform steps comprising: identifying, in a database of utterances, first transcribed utterances and first un-transcribed utterances; identifying transcription candidate utterances from the first un-transcribed utterances; predicting likely recognition error utterances from the transcription candidate utterances; forwarding the likely recognition error utterances to a transcriber, to yield additional transcribed utterances; adding the additional transcribed utterances to the database of utterances, to yield an updated database of second transcribed utterances and second un-transcribed utterances; and if word accuracy has converged, modifying an automatic speech recognition system by providing both the second transcribed utterances and the second un-transcribed utterances to the automatic speech recognition system. 11. The system of claim 8 , wherein word posterior probability estimates are used for confidence scores associated with the database of utterances.