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README.md
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---
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license: mit
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---
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license: mit
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---
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# Teochew Whisper Medium
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This model is a fine-tuned version of the Whisper medium model to recognize the Teochew language (潮州话), a language in the Min Nan family spoken in southern China.
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For a detailed documentation of how this model was trained, please refer to this video: https://www.youtube.com/watch?v=JH_78KmP4Zk
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## Training Data
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The model was fine-tuned on approximately 35 hours of audio data derived from Teochew language movies, TV shows, and comedies.
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## Evaluation Metrics
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On our private test set, we obtained the following Word Error Rate (WER) metrics:
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- Careful Speech: 0.31
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- Conversational Speech: 0.68
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Known Limitations: this model has been trained on short audio clips and may struggle with audio that is longer than 10 seconds.
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## Example code
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The following script downloads the model and starts a demo using Gradio to run the model:
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```
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import torch
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import torchaudio
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from transformers import WhisperProcessor, WhisperForConditionalGeneration
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import gradio as gr
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DEVICE = torch.device("cuda" if torch.cuda.is_available() else "cpu")
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WHISPER_SAMPLE_RATE = 16000
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processor = WhisperProcessor.from_pretrained("openai/whisper-medium")
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model = WhisperForConditionalGeneration.from_pretrained(
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"efficient-nlp/teochew-whisper-medium"
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).to(DEVICE)
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def preprocess_audio(audio_path: str) -> torch.Tensor:
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audio, sample_rate = torchaudio.load(audio_path)
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# Resample if necessary
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if sample_rate != WHISPER_SAMPLE_RATE:
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resampler = torchaudio.transforms.Resample(
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orig_freq=sample_rate, new_freq=WHISPER_SAMPLE_RATE
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)
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audio = resampler(audio)
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# Convert to mono
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if audio.shape[0] > 1:
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audio = torch.mean(audio, dim=0)
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return audio.squeeze()
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def transcribe(audio_path: str) -> str:
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audio_input = preprocess_audio(audio_path)
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input_features = processor(
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audio_input,
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sampling_rate=WHISPER_SAMPLE_RATE,
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return_tensors="pt",
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language="Chinese",
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).input_features.to(DEVICE)
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forced_decoder_ids = processor.get_decoder_prompt_ids(
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language="Chinese", task="transcribe"
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)
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predicted_ids = model.generate(
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input_features, forced_decoder_ids=forced_decoder_ids
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)
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transcription = processor.batch_decode(predicted_ids, skip_special_tokens=True)[0]
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return transcription
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iface = gr.Interface(
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fn=transcribe,
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inputs=gr.Audio(type="filepath"),
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outputs="text",
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title="Teochew Speech Recognition",
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)
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iface.launch()
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```
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