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- ---
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- license: other
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- license_name: lrs3-ted-derived
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- license_link: https://mmai.io/datasets/lip_reading/
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- pretty_name: LRS3 preprocessed features (LipCFM)
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- task_categories:
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- - audio-to-audio
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- - automatic-speech-recognition
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- language:
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- - en
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- size_categories:
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- - 100B<n<1T
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- ---
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-
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- # LRS3 preprocessed — audio, mels, mouth ROIs, face crops, AV-HuBERT & ArcFace features
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-
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- Preprocessed derivatives of **LRS3-TED** used to train LipCFM (lip-conditioned conditional
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- flow matching, F5-TTS style). 302,167 utterances / 438 h.
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-
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- > **Provenance / rights.** These are derivatives of LRS3-TED (Oxford VGG). The uploader
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- > states that redistribution permission was obtained from the dataset authors. Downstream
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- > users remain bound by the original LRS3-TED terms — check before reuse.
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-
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- ## Contents
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-
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- Total 322.3 GB in 30 parts. Excluded from this archive: `landmark/` (21.5 GB) and the
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- `records*/` provenance directories.
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-
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- | Directory | Size | Format |
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- |---|---|---|
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- | `audio/` | 50.63 GB | 16 kHz mono wav |
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- | `audio_norm/` | 50.63 GB | same, loudness-normalised to −23 LUFS |
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- | `mel/` | 50.72 GB | `(T,80)` f32 Tacotron2 log-mel, hop 160 / n_fft 640 / fmax 8000 |
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- | `mel_norm/` | 50.72 GB | log-mel of `audio_norm/` — the CFM training target |
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- | `video/` | 12.64 GB | 96×96 colour mouth ROI, x264 crf 20 @25 fps |
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- | `face/` | 58.67 GB | 224×224 aligned face crop, x264 crf 18 @25 fps |
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- | `avhubert_slv433_L24/` | 80.79 GB | `feat.f16.npy (ΣT,1024)` f16 + offsets/nframes/ids/meta/stats |
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- | `spk/` | 1.26 GB | `emb.f32.npy (N,512)` ArcFace utterance embeddings |
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- | `emo_poster_*/` | 6.13 GB | POSTER++ per-frame emotion logits + featmean |
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- | `label*/` | 0.11 GB | fairseq tsv manifests + `.wrd` transcripts |
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-
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- Alignment: video is 25 fps, mel 100 Hz — 4 mel frames per video frame. ~50% of train
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- utterances carry a 0–40 ms audio/video start offset; see the training repo's
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- `lipcfm/data/manifest.py` for the correction.
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-
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- ## Layout of the parts
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-
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- - `lrs3.files.part00..22.tar.gz` — 23 independent tarballs, 1,813,241 files
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- - `lrs3.feat.part00..06.gz` — 7 raw byte chunks of the single 80.76 GB
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- `avhubert_slv433_L24/feat.f16.npy`, which cannot be split across tar members
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-
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- ## Restore
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-
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- ```bash
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- huggingface-cli download <REPO_ID> --repo-type dataset --local-dir lrs3_parts
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- cd lrs3_parts && ./restore.sh /destination
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- ```
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-
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- `restore.sh` verifies all 30 checksums, extracts the tarballs, reassembles the feature
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- file, then asserts 1,813,241 files and `feat.f16.npy` == 80,764,827,776 bytes.
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-
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- Manual equivalent:
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-
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- ```bash
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- for f in lrs3.files.part*.tar.gz; do tar -xzf "$f" -C /destination; done
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- cat lrs3.feat.part*.gz | gunzip > /destination/lrs3/avhubert_slv433_L24/feat.f16.npy
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- ```
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-
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- ## Training code
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-
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- https://github.com/longkhanh-fam/interspeech2027