Evaluating Live Translation: The Metrics - Deepstash

Evaluating Live Translation: The Metrics

Erasure: Measures the additional reading burden on the user due to instability. It is the number of words that are erased and replaced for every word in the final translation.

Lag: Measures the average time that has passed between when a user utters a word and when the word’s translation displayed on the screen becomes stable. Requiring stability avoids rewarding systems that can only manage to be fast due to frequent corrections.

BLEU score: Measures the quality of the final translation. Quality differences in intermediate translations are captured by a combination of all metrics.

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