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Tragic Talkers: A Shakespearean Sound- and Light-Field Dataset for Audio-Visual Machine Learning Research

Paper · 2022 · Davide Berghi, Marco Volino and Philip J. B. Jackson

Summary

Immersive 3D media needs sound placed exactly where its visual source appears, but public data for this is scarce. Multi-view video collections usually ignore audio, and microphone-array corpora tend to have little or low-quality video. The authors address this gap with Tragic Talkers, a dataset in which two student actors perform scenes from "Romeo and Juliet" in Renaissance-style costume in a studio. They recorded with two identical custom devices, the AVA Rigs. Each rig holds 11 cameras and a 16-microphone array in one calibrated coordinate frame, so the sound field and the light field are captured together. Lavalier microphones and an ambisonic room microphone add clean speech. The material ranges from monologues to dialogues with movement and occlusion, giving 30 sequences seen from 22 viewpoints. Annotations include voice activity, face boxes, pose keypoints, 3D mouth positions and dialogue transcripts. The resource matters because it supports active speaker detection, speaker tracking, diarization, 3D reconstruction and object-based media research on a single coherent corpus.

Key points

  • Each AVA Rig mounts a 16-element microphone array and 11 Grasshopper3 cameras on a 0.6 m × 0.4 m perspex board. Video is 2448×2048 at 30 fps, and audio is 48 kHz, 24-bit.
  • The array is 450 mm wide but only 40 mm tall, so it localizes sound better in azimuth than in elevation, as human hearing does.
  • The dataset has 30 sequences from 22 views, or 60 single-rig sequences, giving about 3.8 hours of annotated monocular video with multi-channel audio. An earlier version had only 20 sequences with fewer labels.
  • Labels cover voice activity, 2D face bounding boxes and transcriptions; 3D mouth positions and 2D pose keypoints are provided for only a subset. The background is chroma-uniform to ease silhouette extraction.
  • The data is released at cvssp.org/data/TragicTalkers with PyTorch data loaders and feature extractors. The authors' comparison table shows it is the only such dataset combining a co-located rig, actors and a uniform background.

Interesting ideas

  • I1. In earlier work, a pretrained visual active-speaker detector produced pseudo-labels that taught a separate audio-only network to locate speakers in the frame, so one modality supervised another without manual labels.
  • I2. The scenes were scripted to climb in difficulty, from one speaker alone, to two people talking, to movement with occlusion, so each failure can be traced to a specific hard condition.
  • I3. All sensors sit on one rigid platform and share a single calibrated coordinate frame, which keeps every annotation layer aligned across modalities.
  • I4. The authors suggest splicing existing sequences into new multi-talker combinations as a cheap form of data augmentation.
  • I5. Clean close-microphone recordings are stored next to the noisy array audio as a reference, so processed signals can be checked against ground truth.

For Mova

How these ideas could serve Mova, our small open language model — its files, stages and tests:

  • I1 (learn): Agreed parses from the witness parsers could likewise serve as free silver supervision for a different component, such as a frame or role tagger that never sees the parsers' internals.
  • I2 (answer): Fable and test QA sets could be stratified the same way (one character, then dialogue, then interleaved actors with pronoun "occlusion") to show where reading breaks.
  • I3 (tree): Tokens, UD arcs, frames and world entities should all hang off one shared character-offset frame, so explanations stay aligned across stages.
  • I4 (world): Simple stories could be interleaved to create synthetic multi-character texts whose entity states and event order are known by construction, giving controlled tests for coreference and event ordering.
  • I5 (learn): Keeping a gold reference text alongside every noisy or converted input (for example, after UD dialect conversion) lets each repair rule be evaluated against a known target.

Our summary of the paper, in our own words — not its text. The work belongs to its authors; read it at the links above.

 Institutions

 Fields, topics and concepts

Cite

Cite as Davide Berghi, Marco Volino and Philip J. B. Jackson. 2022. Tragic Talkers: A Shakespearean Sound- and Light-Field Dataset for Audio-Visual Machine Learning Research. arXiv:2212.01892.

The paper itself, not this page. BibTeX from the library's record of the work. DOI 10.1145/3565516.3565522 · arXiv 2212.01892

@misc{berghi2022tragic,
  title = {{Tragic Talkers: A Shakespearean Sound- and Light-Field Dataset for Audio-Visual Machine Learning Research}},
  author = {Davide Berghi, Marco Volino and Philip J. B. Jackson},
  year = {2022},
  doi = {10.1145/3565516.3565522},
  eprint = {2212.01892},
  archivePrefix = {arXiv},
  url = {https://doi.org/10.1145/3565516.3565522}
}

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