¶ … devising a strategy for detecting errors on a CRF, what are the benefits of strict detection parameters (high sensitivity) versus more relaxed parameters (high specificity)?
Even though small ASR errors might not impact downstream processes that make use of the transcript, larger error segments like those generated by OOVs can have a considerable impact on applications such as speech-to-speech translation and can eventually lead to communication failure between users of the system. The most significant error segment is passed to a dialog system for interactive recovery in which rephrased words are reinserted in the original. However benefits can be derived from both a high sensitivity strategy versus a high specificity strategy.
A high sensitivity strategy is one that is able to detect more errors in a broader manner than that of a high specificity approach. With high sensitivity, errors that are detected are more likely to be false positives. They system may elect to detect the error even though the error was detected incorrectly. High sensitivity allows for more potential errors to be detected at the expense of accuracy or false positives. With high specificity, errors are detected at more of a granular level. These errors are specific to...
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