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articles/ai-services/speech-service/how-to-custom-speech-evaluate-data.md

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manager: nitinme
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ms.service: azure-ai-speech
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ms.topic: how-to
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ms.date: 11/29/2022
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ms.date: 12/20/2023
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ms.author: eur
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ms.custom: ignite-fall-2021
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zone_pivot_groups: speech-studio-cli-rest
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## Evaluate token error rate (TER)
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Besides [word error rate](#evaluate-word-error-rate-wer-wer), you can also use the extended measurement of **Token Error Rate (TER)** to evaluate quality on the final end-to-end display format. In addition to the lexical format (`That will cost $900.` instead of `that will cost nine hundred dollars`), TER takes into account the display format aspects such as punctuation, capitalization, and ITN. Learn more about [Display output formatting with speech to text](display-text-format.md).
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Besides [word error rate](#evaluate-word-error-rate-wer), you can also use the extended measurement of **Token Error Rate (TER)** to evaluate quality on the final end-to-end display format. In addition to the lexical format (`That will cost $900.` instead of `that will cost nine hundred dollars`), TER takes into account the display format aspects such as punctuation, capitalization, and ITN. Learn more about [Display output formatting with speech to text](display-text-format.md).
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TER counts the number of incorrect tokens identified during recognition, and divides the sum by the total number of tokens provided in the human-labeled transcript (N).
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