TCG CREST System Description for the Second DISPLACE Challenge
This work addresses diarization challenges for audio processing applications, but it is incremental as it builds on existing methods and benchmarks.
The paper tackled speaker and language diarization in multilingual, multi-speaker scenarios for the Second DISPLACE Challenge, achieving about 7% relative improvement over the baseline in speaker diarization but no improvement in language diarization.
In this report, we describe the speaker diarization (SD) and language diarization (LD) systems developed by our team for the Second DISPLACE Challenge, 2024. Our contributions were dedicated to Track 1 for SD and Track 2 for LD in multilingual and multi-speaker scenarios. We investigated different speech enhancement techniques, voice activity detection (VAD) techniques, unsupervised domain categorization, and neural embedding extraction architectures. We also exploited the fusion of various embedding extraction models. We implemented our system with the open-source SpeechBrain toolkit. Our final submissions use spectral clustering for both the speaker and language diarization. We achieve about $7\%$ relative improvement over the challenge baseline in Track 1. We did not obtain improvement over the challenge baseline in Track 2.