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Text normalization for speech rewrites written tokens into spoken forms, such as expanding dates, amounts and abbreviations.
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Context matters because a token may have more than one spoken interpretation.
Kestrel describes tokenization, semiotic classification and verbalization with language-specific grammars. Neural normalization research evaluates English and Russian Wikipedia sentences verbalized by Kestrel and discusses WFST covering grammars as a safeguard against unrecoverable errors. These are system- and study-specific descriptions, not universal claims about production practice. The neural text-normalization paper uses Kestrel-verbalized English and Russian Wikipedia sentences and discusses WFST covering grammars to reduce unrecoverable errors. Its results are study-specific.
A text normalizer can expand “$5” to “five dollars” before speech synthesis.
A token such as “Dr.” may need context to select a spoken form.
Kestrel describes language-specific normalization grammars using weighted finite-state transducers.
A neural text-normalization study evaluated models on English and Russian Wikipedia sentences processed by Kestrel.
Combine statistical methods and explicit rules only when evaluation on the intended language and text domain justifies the design. The cited studies do not establish that every production normalizer uses one architecture.
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Text normalization for speech rewrites written tokens into spoken forms, such as expanding dates, amounts and abbreviations. Context matters because a token may have more than one spoken interpretation.
La normalización expande tokens no estándar como números, fechas y abreviaturas a su forma hablada verbalizada antes de la síntesis.
La moneda requiere reordenar y verbalizar el símbolo, por lo que "5 dólares" se pronuncia como "cinco dólares", no literalmente de izquierda a derecha.
'Dr.' puede ser "doctor" o "drive" y "IV" puede ser "cuatro", "intravenoso" o las letras; el contexto determina la verbalización correcta.
The cited neural text-normalization study evaluated models on English and Russian Wikipedia sentences verbalized by Kestrel. This is a study-specific dataset, not a universal production claim.
The neural text-normalization paper discusses WFST-based covering grammars to reduce unrecoverable errors. This is the paper’s described safeguard, not a universal claim that all production systems avoid neural normalization.
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