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I am working on building speech recognition software for my company.

In the meantime however, we will purchase some off-the-shelf commercial speech recognizers until the in-house one is ready. My question:
1. How are speech recognizers evaluated?
2. Are there any standardized tests available that can be used to test speech recognizers and determine the better one of the two?

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NIST has a web page that provides a good detailed discussion of how to score ASR software.

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