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Audio-visual segmentation benchmarks used one microphone, so two people talking at once could not be told apart

AspireAI community · arXiv (Yifu Sun et al.)
Audio-visual instance segmentation tracks individual sound-producing objects in video, and existing benchmarks use monaural audio, which lacks the inter-channel cues needed to separate concurrent sound sources. AVPS-360 fixes that by pairing first-order Ambisonics audio with synchronised 360-degree video across 230 recordings totalling 10.5 hours, averaging 164.0 seconds per recording and capturing intermittent sound production in real interactions dominated by speech, along with laughter, clapping and footsteps. It provides 31,678 manually reviewed instance masks linked to source identities and sound-event labels, and a baseline integrating spatial audio with visual features for frame-level segmentation and identity association. Experiments show existing AVIS methods struggling with detection and identity association on long recordings with intermittent sound production, while the baseline substantially improves both.
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