Fact · Transcription
250milliseconds excluded around speaker boundaries
Most earlier diarization papers scored a modified DER that leaves out speech within 250 milliseconds of a speaker boundary and all overlapped speech.
Checked against its source on October 17, 2026
In the source's own words
“speech within 250 ms of reference boundaries and overlapped speech are excluded from scoring”
The Second DIHARD Diarization Challenge: Dataset, task, and baselines, Neville Ryant et al., arXiv (Interspeech 2019 challenge paper), 2019, Section 1, Introduction (performance metrics).
Open the original- What it measures
- The challenge organizers say that short backchannels and overlapping speech are common in conversation, so leaving them out flatters systems.
- What it does not show
- This describes the authors' reading of prior work. It is the reason the second DIHARD challenge chose different scoring.