Data-driven Pronunciation Generation for ASR
Generování fonetického slovníku pro rozpoznávání řeči z dat
diplomová práce (OBHÁJENO)
Zobrazit/ otevřít
Trvalý odkaz
http://hdl.handle.net/20.500.11956/109402Identifikátory
SIS: 212087
Kolekce
- Kvalifikační práce [10932]
Autor
Vedoucí práce
Oponent práce
Peterek, Nino
Fakulta / součást
Matematicko-fyzikální fakulta
Obor
Matematická lingvistika
Katedra / ústav / klinika
Ústav formální a aplikované lingvistiky
Datum obhajoby
9. 9. 2019
Nakladatel
Univerzita Karlova, Matematicko-fyzikální fakultaJazyk
Angličtina
Známka
Výborně
Klíčová slova (česky)
ASR, fonetický slovník, data-driven, fonetikaKlíčová slova (anglicky)
ASR, phonetic dictionary, data-driven, unsupervised, phoneticsData-Driven Pronunciation Generation for ASR Maria Obedkova In ASR systems, dictionaries are usually used to describe pronunciations of words in a language. These dictionaries are typically hand-crafted by linguists. One of the most significant drawbacks of dictionaries created this way is that linguistically motivated pronunciations are not necessarily the optimal ones for ASR. The goal of this research was to explore approaches of data-driven pro- nunciation generation for ASR. We investigated several approaches of lexicon generation and implemented the completely new data-driven solution based on the pronunciation clustering. We proposed an approach for feature extraction and researched different unsupervised methods for pronunciation clustering. We evaluated the proposed approach and compared it with the current hand-crafted dictionary. The proposed data-driven approach could beat the established base- lines but underperformed in comparison to the hand-crafted dictionary which could be due to unsatisfactory features extracted from data or insufficient fine tuning. 1