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Enhancing Dialogue Annotation with Speaker Characteristics Leveraging a Frozen LLM

Created by
  • Haebom

Author

Thomas Thebaud, Yen-Ju Lu, Matthew Wiesner, Peter Viechnicki, Najim Dehak

Outline

This paper presents a complementary step in the postprocessing process of improving grammar, punctuation, and readability in a conversation transcription pipeline by leveraging a large-scale language model (LLM). This enriches the transcripts by adding metadata tags, such as the speaker's age, gender, and sentiment. Some tags are global for the entire conversation, while others are time-varying. We present an approach that combines a fixed audio-based model, such as Whisper or WavLM, with a fixed LLAMA language model to infer speaker attributes without task-specific fine-tuning of either model. Using a lightweight, efficient connector that connects audio and linguistic representations, we achieve competitive performance on speaker profiling tasks while maintaining modularity and speed. Furthermore, we demonstrate that the fixed LLAMA model achieves an equal error rate (ER) of 8.8% in some scenarios by directly comparing x-vectors.

Takeaways, Limitations

Takeaways:
We demonstrate that combining audio-based models with LLMs can build an efficient and modular conversation transcription post-processing pipeline.
This suggests that the performance of speaker attribute inference can be improved using a fixed model without task-specific fine-tuning.
We demonstrate that effective speaker recognition performance can be achieved through x-vector comparison using the LLAMA model.
You can enrich and enhance your conversations by adding metadata tags to your conversation records.
Limitations:
Only performance in specific scenarios is presented, and generalization performance across different environments and datasets requires further study.
There may be limitations on the type of audio-based model and LLM used.
Further evaluation of the accuracy and reliability of metadata tags is needed.
The 8.8% EER is limited to a specific scenario and requires broader experimental results.
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