18. The method of claim 1 , wherein the step (A) comprises a step of: (A) (1) deriving the likelihood from a confidence measure representing a degree of confidence that the region of the document correctly represents the content in the corresponding region of the spoken audio stream, wherein the confidence measure is provided by an automatic transcription system that produced the region of the document based on the region of the spoken audio stream.
19. The method of claim 18 , wherein the step (A)(1) comprises a step of deriving the estimate of the likelihood from the confidence measure, a prior likelihood of correctness of the region of the document, and a feature of the spoken audio stream.