Create README.md

README.md

@@ -0,0 +1,226 @@
+---
+language:
+- en
+license: mit
+library_name: transformers
+pipeline_tag: audio-classification
+tags:
+- emotion-recognition
+- speech-emotion-recognition
+- multimodal-learning
+- audio-classification
+- speech-processing
+- text-processing
+- english
+- affective-computing
+- umuteam
+datasets:
+- RAVDESS
+- TESS
+metrics:
+- accuracy
+- f1
+
+model-index:
+- name: UMUTeam/w2v-bert-beto-concat-emotion-en
+  results:
+  - task:
+      type: audio-classification
+      name: Multimodal Speech Emotion Recognition
+    dataset:
+      name: English Multimodal Emotion Recognition Benchmark
+      type: custom
+    metrics:
+    - type: accuracy
+      value: 96.0462
+      name: Accuracy
+    - type: weighted-f1
+      value: 96.0257
+      name: Weighted F1
+    - type: macro-f1
+      value: 96.0462
+      name: Macro F1
+---
+
+# UMUTeam/w2v-bert-beto-concat-emotion-en
+
+## Model description
+
+`UMUTeam/w2v-bert-beto-concat-emotion-en` is an English multimodal emotion recognition model developed as part of **speech-emotion**, an open-source multilingual and multimodal toolkit for emotion recognition from speech, text, and multimodal inputs.
+
+This model performs **multimodal emotion classification from English speech and text inputs**.
+
+The model combines acoustic representations extracted with Wav2Vec2-BERT and linguistic representations generated with RoBERTa using a concatenation-based multimodal fusion strategy.
+
+It is designed to jointly exploit complementary emotional information from speech and text in order to improve emotion recognition performance compared to unimodal approaches.
+
+The model predicts one of the following emotion labels:
+
+- `angry`
+- `disgust`
+- `fear`
+- `happy`
+- `neutral`
+- `sad`
+- `surprise`
+
+## Intended use
+
+This model is intended for research and applied scenarios involving multimodal emotion recognition in English, such as:
+
+- multimodal conversational analysis
+- speech and text emotion analysis
+- affective computing research
+- emotion-aware conversational systems
+- human-computer interaction
+- multimodal AI research
+
+The model is particularly useful in scenarios where both speech audio and transcribed text are available.
+
+It can be used through the `speech-emotion` toolkit.
+
+## Out-of-scope use
+
+This model should not be used as the sole basis for high-stakes decisions, including but not limited to:
+
+- clinical diagnosis
+- mental health assessment
+- employment, legal, or educational decisions
+- biometric profiling or surveillance
+- automated decisions affecting individuals without human oversight
+
+Emotion recognition is inherently uncertain and context-dependent. Predictions should be interpreted as model estimates, not as definitive assessments of a person's emotional state.
+
+## Training data
+
+The model was trained on the English multimodal datasets used in the `speech-emotion` project.
+
+The training data combines multiple publicly available English speech and multimodal emotion recognition datasets, including:
+
+- RAVDESS
+- TESS
+- datasets derived from prior speech emotion recognition research benchmarks
+
+Because the original datasets use different emotion taxonomies, all datasets were harmonized into a unified seven-class emotion taxonomy:
+
+- `angry`
+- `disgust`
+- `fear`
+- `happy`
+- `neutral`
+- `sad`
+- `surprise`
+
+For the English multimodal emotion recognition setup, the same aligned speech-text samples were used for both the acoustic and textual modalities:
+
+- Training samples: 3,622
+- Validation samples: 453
+- Test samples: 453
+
+More details about the dataset preprocessing and label harmonization pipeline are available in the project repository:
+
+https://github.com/NLP-UMUTeam/umuteam-speech-emotion
+
+## Evaluation
+
+The model was evaluated on the English held-out test set used in the `speech-emotion` toolkit.
+
+### Performance comparison on English emotion recognition
+
+| Configuration | Accuracy | Weighted Precision | Weighted F1 | Macro F1 |
+|---|---:|---:|---:|---:|
+| Speech-only | 95.1435 | 95.2700 | 95.1575 | 95.1679 |
+| Text-only | 76.0842 | 75.5723 | 75.6852 | 68.0266 |
+| Multimodal (Concat) | **96.0462** | **96.0880** | **96.0257** | **96.0462** |
+| Multimodal (Mean) | 90.2870 | 90.5162 | 90.2334 | 90.2589 |
+| Multimodal (Multihead) | 93.1567 | 93.2715 | 93.1898 | 93.2115 |
+
+The results show that combining acoustic and linguistic representations improves emotion recognition performance compared to unimodal speech-only or text-only systems.
+
+Among the evaluated fusion strategies, the concatenation-based multimodal approach achieved the best overall performance across all reported metrics.
+
+## How to use
+
+Install the toolkit:
+
+```bash
+pip install speech-emotion
+```
+
+### Multimodal emotion recognition using audio and text
+
+```python
+from speech_emotion import predict_emotion
+
+emotion = predict_emotion(
+    audio_path="audio.wav",
+    text="I was really happy to see you again.",
+    language="en",
+    mode="concat",
+    model_config_path="model.json"
+)
+
+print("Detected emotion:", emotion)
+```
+
+### Multimodal emotion recognition using automatic transcription (Whisper)
+
+If no transcription is provided, the toolkit can automatically generate it using Whisper before performing emotion recognition.
+
+```python
+from speech_emotion import predict_emotion
+
+emotion = predict_emotion(
+    audio_path="audio.wav",
+    language="en",
+    mode="concat",
+    model_config_path="model.json"
+)
+
+print("Detected emotion:", emotion)
+```
+
+Repository:
+
+https://github.com/NLP-UMUTeam/umuteam-speech-emotion
+
+## Limitations
+
+- The model is designed for English multimodal emotion recognition and may not generalize reliably to other languages.
+- It predicts a single label from a fixed set of seven emotions.
+- Emotion expression is subjective and highly context-dependent.
+- Performance may decrease with noisy audio, inaccurate transcriptions, overlapping speakers, or domain shifts.
+- The model assumes that audio and text inputs are semantically aligned.
+- Errors in automatic speech transcription may negatively affect multimodal performance.
+
+## Bias and ethical considerations
+
+Emotion recognition systems may reflect biases present in their training data, including differences related to accents, speaking styles, demographics, recording conditions, or annotation subjectivity.
+
+Users should avoid interpreting predictions as objective truths about a person's internal emotional state. The model should be used with transparency, appropriate consent, and human oversight, especially in sensitive contexts.
+
+## Citation
+
+If you use this model in your research, please cite the following works:
+
+### speech-emotion toolkit
+
+```bibtex
+@article{PAN2026102677,
+title = {speech-emotion: A multilingual and multimodal toolkit for emotion recognition from speech},
+journal = {SoftwareX},
+volume = {34},
+pages = {102677},
+year = {2026},
+issn = {2352-7110},
+doi = {https://doi.org/10.1016/j.softx.2026.102677},
+url = {https://www.sciencedirect.com/science/article/pii/S235271102600169X},
+author = {Ronghao Pan and Tomás Bernal-Beltrán and José Antonio García-Díaz and Rafael Valencia-García},
+}
+```
+
+## Acknowledgments
+
+This work is part of the research project LaTe4PoliticES (PID2022-138099OB-I00), funded by MICIU/AEI/10.13039/501100011033 and the European Regional Development Fund (ERDF/EU - FEDER/UE), “A way of making Europe”.
+
+Mr. Tomás Bernal-Beltrán is supported by the University of Murcia through the predoctoral programme.