| Challenge: | Text normalization (TN) is an important step in conversational systems. |
| Approach: | They frame text normalization as a machine translation task and tackle it with sequence-to-sequence models. |
| Outcome: | The proposed model normalizes written text to its spoken form to facilitate speech recognition and text-to-speech synthesis. |
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Utilizing Character and Word Embeddings for Text Normalization with Sequence-to-Sequence Models (D18-1)
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| Challenge: | Recent advances in text normalization have limited applications in other languages . a novel approach to text normalizing uses character embeddings and word embedds . |
| Approach: | They propose a sequence-to-sequence model with character-based attention that uses pre-trained word embeddings to model subword information. |
| Outcome: | The proposed model achieves state-of-the-art F1 score on Arabic spelling correction task despite being small and unsuited for the task. |
Neural text normalization leveraging similarities of strings and sounds (2020.coling-main)
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| Challenge: | Existing methods that ignore the similarities of word strings and sounds do not account for these features. |
| Approach: | They propose a neural model that considers the similarities of both word strings and sounds, and a model that takes only the similarity of word strings or of sounds as a baseline. |
| Outcome: | The proposed models outperformed a baseline model and achieved state-of-the-art results on WNUT-2015. |
Proteno: Text Normalization with Limited Data for Fast Deployment in Text to Speech Systems (2021.naacl-industry)
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| Challenge: | Developing Text Normalization systems for Text-to-Speech (TTS) on new languages is hard. |
| Approach: | They propose a novel architecture to facilitate Text Normalization systems for TTS on new languages . they use a granular tokenization mechanism that enables the system to learn majority of classes . |
| Outcome: | The proposed architecture performs comparable with the state-of-the-art systems on English . the proposed system learns most classes from training data and precodes them for other classes . |
PolyNorm: Few-Shot LLM-Based Text Normalization for Text-to-Speech (2025.emnlp-industry)
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| Challenge: | Text Normalization (TN) is a key preprocessing step in Text-to-Speech systems. |
| Approach: | They propose a prompt-based approach to TN using Large Language Models (LLMs) they propose scalable experimentation across languages to reduce the reliance on manual rules . |
| Outcome: | The proposed approach reduces the reliance on manual rules and enables broader linguistic applicability with minimal human intervention across eight languages. |
Subword Regularization: Improving Neural Network Translation Models with Multiple Subword Candidates (P18-1)
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| Challenge: | Subword units are an effective way to alleviate the open vocabulary problems in neural machine translation. |
| Approach: | They propose a method to regularize subword segmentations probabilistically by sampling subwords . they also propose 'unigram' language model to be used for better subword sampling . |
| Outcome: | The proposed method improves on low resource and out-of-domain settings with multiple corpora. |
Dialect-to-Standard Normalization: A Large-Scale Multilingual Evaluation (2023.findings-emnlp)
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| Challenge: | Text normalization is a range of tasks that consist in replacing non-standard spellings with their standard equivalents. |
| Approach: | They introduce dialect-to-standard normalization as a sentence-level character transduction task and provide a large-scale analysis of these methods. |
| Outcome: | The proposed model performs best for Finnish, Swiss German and Slovene while the pre-trained model using full sentences performs the best for Norwegian. |
Handling Normalization Issues for Part-of-Speech Tagging of Online Conversational Text (L18-1)
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Géraldine Damnati, Jeremy Auguste, Alexis Nasr, Delphine Charlet, Johannes Heinecke, Frédéric Béchet
| Challenge: | a new approach to POS tagging noisy user generated text is proposed . word embeddings are trained on a noisy corpus to address both normalization and POS. |
| Approach: | They propose to use word embeddings to normalize text before tagging it, while a gated neural network based tagger handles the remaining errors. |
| Outcome: | The proposed approach normalizes some errors before tagging, while a gated neural network handles the remaining errors. |
Subword Segmental Machine Translation: Unifying Segmentation and Target Sentence Generation (2023.findings-acl)
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| Challenge: | Subword segmenters are used in neural machine translation, but are not used in high-resource settings. |
| Approach: | They propose a subword segmental machine translation (SSMT) that unifies subword and MT in a single trainable model. |
| Outcome: | The proposed model improves chrF scores for morphologically rich agglutinative languages and is more robust on a test set constructed for evaluating morphology generalisations. |
Deep Neural Models for Medical Concept Normalization in User-Generated Texts (P19-2)
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| Challenge: | a medical concept normalization problem is a challenge since social media texts are ambiguous and noisy . a recent study shows that neural architectures leverage the semantic meaning of the entity mention . |
| Approach: | They propose to map a health-related entity mention to a controlled vocabulary . they use powerful neural networks and contextualized word representation models . |
| Outcome: | The proposed model outperforms existing state-of-the-art models in mapping medical concepts to medical terms . the proposed model is based on recurrent neural networks and contextualized word representation models . |
Normalizing Non-canonical Turkish Texts Using Machine Translation Approaches (P19-2)
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| Challenge: | a study using non-canonical text normalization shows that it can surpass the current best performing system by a large margin. |
| Approach: | They propose a fully automated, context-aware machine translation approach with fewer stages of processing. |
| Outcome: | The proposed approach surpasses the current best-performing system by a large margin . the proposed method is more data-hungry and more data sensitive than other methods . |