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Communication Dans Un Congrès Année : 2014

Phoneme Similarity Matrices to Improve Long Audio Alignment for Automatic Subtitling

Aitor Álvarez
Haritz Arzelus

Résumé

Long audio alignment systems for Spanish and English are presented, within an automatic subtitling application. Language-specific phone decoders automatically recognize audio contents at phoneme level. At the same time, language-dependent grapheme-to-phoneme modules perform a transcription of the script for the audio. A dynamic programming algorithm (Hirschberg's algorithm) finds matches between the phonemes automatically recognized by the phone decoder and the phonemes in the script's transcription. Alignment accuracy is evaluated when scoring alignment operations with a baseline binary matrix, and when scoring alignment operations with several continuous-score matrices, based on phoneme similarity as assessed through comparing multivalued phonological features. Alignment accuracy results are reported at phoneme, word and subtitle level. Alignment accuracy when using the continuous scoring matrices based on phonological similarity was clearly higher than when using the baseline binary matrix.
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Dates et versions

hal-01099239 , version 1 (07-01-2015)

Identifiants

  • HAL Id : hal-01099239 , version 1

Citer

Pablo Ruiz, Aitor Álvarez, Haritz Arzelus. Phoneme Similarity Matrices to Improve Long Audio Alignment for Automatic Subtitling. LREC, Ninth International Conference on Language Resources and Evaluation, May 2014, Reykjavik, Iceland. ⟨hal-01099239⟩
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