README.md

---
license: apache-2.0
language:
- en
size_categories:
- 100M<n<1B
---


# Dataset Card for  Dataset Curation of 3DXTalker

### Dataset Description

- **Repository:** [https://github.com/EngineeringAI-LAB/3DXTalker/tree/main]
- **Paper:** [https://arxiv.org/abs/2602.10516]
- **Project :** [https://engineeringai-lab.github.io/3DXTalker.github.io/]

### Dataset Summary

This dataset is a large-scale, curated collection of talking head videos built for tasks such as high-fidelity 3D talking avatar generation, lip synchronization, and pose dynamics modeling. 

The dataset aggregates and standardizes data from six prominent sources (**GRID, RAVDESS, MEAD, VoxCeleb2, HDTF, Celebv-HQ**), processed through a rigorous data curation pipeline to ensure high quality in terms of face alignment, resolution, and audio-visual synchronization. It covers diverse environments (Lab vs. Wild) and a wide range of subjects.

### Supported Tasks and Leaderboards

- **3D Talking Head Generation:** Synthesizing realistic talking videos from driving speech.
- **Audio-Driven Lip Synchronization:** Aligning lip movements precisely with input speech.
- **Emotion Analysis & Synthesis:** Leveraging the emotional diversity in datasets like RAVDESS and MEAD.
- **Audio-Driven Head Pose Synthesis:** Modeling natural head movements and orientation directly driving speech.

## Dataset Structure
```
trainset/

├── V0-GRID/ # 6,570 sequences from GRID corpus

│ ├── V0-s1-00001/

│ │ ├── audio.wav # (N,) audio data

│ │ ├── cam.npy # (T, 3) camera parameters

│ │ ├── detailcode.npy # (T, 128) facial details

│ │ ├── envelope.npy # (N,) audio envelope

│ │ ├── expcode.npy # (T, 50) expression codes

│ │ ├── lightcode.npy # (T, 9, 3) lighting

│ │ ├── metadata.pkl # Sequence metadata

│ │ ├── posecode.npy # (T, 6) head pose

│ │ ├── refimg.npy # (C, H, W) reference image

│ │ ├── shapecode.npy # (T, 100) shape codes

│ │ └── texcode.npy # (T, 50) texture codes

│ ├── V0-s1-00002/

│ │ └── ... (same 11 files)

│ ├── V0-s1-00003/

│ └── ... (6,570 total sequences)

│

├── V1-RAVDESS/ # 583 sequences from RAVDESS dataset

│ ├── V1-Song-Actor_01-00001/

│ │ └── ... (same 11 files)

│ ├── V1-Song-Actor_01-00002/

│ ├── V1-Speech-Actor_01-00001/

│ ├── V1-Speech-Actor_02-00001/

│ └── ... (583 total sequences)

│

├── V2-MEAD/ # 1,939 sequences from MEAD dataset

│ ├── V2-M003-angry-00001/

│ │ └── ... (same 11 files)

│ ├── V2-M003-angry-00002/

│ ├── V2-M003-happy-00001/

│ ├── V2-W009-sad-00001/

│ └── ... (1,939 total sequences)

│

├── V3-VoxCeleb2/ # 1,296 sequences from VoxCeleb2

│ ├── {sequence_id}/

│ │ └── ... (same 11 files)

│ └── ... (1,296 total sequences)

│

├── V4-HDTF/ # 350 sequences from HDTF dataset

│ ├── {sequence_id}/

│ │ └── ... (same 11 files)

│ └── ... (350 total sequences)

│

└── V5-CelebV-HQ/ # 768 sequences from CelebV-HQ dataset

├── {sequence_id}/

│ └── ... (same 11 files)

└── ... (768 total sequences)

```


## Data Format Details

### File Overview
| File | Type | Shape | Description |
|------|------|-------|-------------|
| `audio.wav` | Audio | (N_samples,) | Original audio waveform|
| `cam.npy` | Parameters | (N_frames, 3) | Camera parameters (position/scale) |
| `detailcode.npy` | Parameters | (N_frames, 128) | Facial detail codes (wrinkles, fine features) |
| `envelope.npy` | Parameters | (N_audio_samples,) | Audio envelope/amplitude over time |
| `expcode.npy` | Parameters | (N_frames, 50) | FLAME expression parameters (50-dim) |
| `lightcode.npy` | Parameters | (N_frames, 9, 3) | Spherical harmonics lighting (9 bands × RGB) |
| `metadata.pkl` | Metadata | N/A | Sequence metadata (integer or dict) |
| `posecode.npy` | Parameters | (N_frames, 6) | 3 head pose + 3 jaw pose |
| `refimg.npy` | Image | (3, 224, 224) | Reference image (RGB, 224×224 pixels) |
| `shapecode.npy` | Parameters | (N_frames, 100) | FLAME shape parameters (100-dim) |
| `texcode.npy` | Parameters | (N_frames, 50) | Texture codes (50-dim) |

### Coordinate Systems and Conventions
- **FLAME model**: 3D Morphable Face Model with 5023 vertices
- **Expression space**: 50-dimensional linear basis
- **Shape space**: 100-dimensional PCA space
- **Pose representation**: 3 head pose + 3 jaw pose
- **Lighting**: 2nd-order spherical harmonics (9 bands)

### Temporal Synchronization
- **Video frames**: 25 FPS (frames per second)
- **Audio samples**: 16,000 samples per second
- All video parameters (`expcode`, `shapecode`, `detailcode`, `posecode`, `cam`, `lightcode`, `texcode`) share the same `N_frames` dimension
- Audio and video are temporally aligned (frame 0 corresponds to start of audio)



### Data Statistics

The dataset comprises **11,706** total video samples, spanning approximately **67.4 hours** of self-talking footage. The data is categorized by environment (Lab vs. Wild) and includes varying resolutions and subject diversity.

#### Detailed Statistics (from Curation Pipeline)

| Dataset     | ID | Environment | Year | Raw Resolution | Size (samples) | Subject | Total Duration (s) | Hours (h) | Avg. Duration (s/sample) |
|-------------|----|-------------|------|----------------|----------------|---------|--------------------|-----------|--------------------------|
| **GRID** | V0 | Lab         | 2006 | 720 × 576      | 6,600          | 34      | 99,257.81          | 27.57     | 15.04                    |
| **RAVDESS** | V1 | Lab         | 2018 | 1280 × 1024    | 613            | 24      | 10,071.88          | 2.80      | 16.43                    |
| **MEAD** | V2 | Lab         | 2020 | 1920 × 1080    | 1,969          | 60      | 42,868.77          | 11.91     | 21.77                    |
| **VoxCeleb2**| V3| Wild        | 2018 | 360P~720P      | 1,326          | 1k+     | 21,528.20          | 5.98      | 16.24                    |
| **HDTF** | V4 | Wild        | 2021 | 720P~1080P     | 400            | 300+    | 55,452.08          | 15.40     | 138.63                   |
| **Celebv-HQ**| V5| Wild        | 2022 | 512 × 512      | 798            | 700+    | 13,486.20          | 3.75      | 16.90                    |

### Data Splits

The dataset follows a strict training and testing split protocol to ensure fair evaluation. The testing set is composed of a balanced selection from each sub-dataset.

| Dataset       | ID  | Total Size | Training Set | Test Set |
| ------------- | --- | ---------- | ------------ | -------- |
| **GRID**      | V0  | 6,600      | 6,570        | 30       |
| **RAVDESS**   | V1  | 613        | 583          | 30       |
| **MEAD**      | V2  | 1,969      | 1,939        | 30       |
| **VoxCeleb2** | V3  | 1,326      | 1,296        | 30       |
| **HDTF**      | V4  | 400        | 350          | 50       |
| **Celebv-HQ** | V5  | 798        | 768          | 30       |
| **Summary**   |     | **11,706** | **11,506**   | **200**  |

## Dataset Creation

### Curation Rationale

Raw videos from the wild (e.g., VoxCeleb2, Celebv-HQ) often contain background noise, diverse languages, or varying resolutions. This dataset is the result of the following data curation pipeline  designed to ensure high-quality audio-visual consistency:

1.  **Duration Filtering:** To facilitate temporal modeling, short clips from lab datasets are concatenated to form 10–20s sequences, while wild samples shorter than 10s are filtered out.
2.  **Signal-to-Noise Ratio (SNR) Filtering:** Clips with strong background noise, music, or environmental interference are removed based on SNR thresholds to ensure clean audio features.
3.  **Language Filtering:** Linguistic consistency is enforced by using **Whisper** to discard non-English samples or those with low detection confidence.
4.  **Audio-Visual Sync Filtering:** **SyncNet** is used to eliminate clips with poor lip synchronization, abrupt scene cuts, or off-screen speakers (e.g., voice-overs).
5.  **Resolution Normalization:** All videos are resized and center-cropped to a unified **512×512** resolution and re-encoded at **25 FPS** with standardized RGB to harmonize data from diverse sources.

### Source Video Data

- **GRID:** https://zenodo.org/records/3625687
- **RAVDESS:** https://zenodo.org/records/1188976
- **MEAD:** https://wywu.github.io/projects/MEAD/MEAD.html
- **VoxCeleb2:** https://www.robots.ox.ac.uk/~vgg/data/voxceleb/vox2.html
- **HDTF:** https://huggingface.co/datasets/global-optima-research/HDTF
- **Celebv-HQ:** https://github.com/CelebV-HQ/CelebV-HQ/

## Citation
```bibtex
@misc{wang20263dxtalkerunifyingidentitylip,
      title={3DXTalker: Unifying Identity, Lip Sync, Emotion, and Spatial Dynamics in Expressive 3D Talking Avatars}, 
      author={Zhongju Wang and Zhenhong Sun and Beier Wang and Yifu Wang and Daoyi Dong and Huadong Mo and Hongdong Li},
      year={2026},
      eprint={2602.10516},
      archivePrefix={arXiv},
      primaryClass={cs.CV},
      url={https://arxiv.org/abs/2602.10516}, 
}
```