ISCA Archive ICSLP 2000
ISCA Archive ICSLP 2000

Spanish recogniser of continuously spelled names over the telephone

Ruben San-Segundo, José Colás, Javier Ferreiros, Javier Macías-Guarasa, Juan Miguel Pardo

lapiz@die.upm.es http://www-gth.die.upm.es ABSTRACT In the paper, we present an analysis of the spelling task for Spanish and we describe the research and implementation of a Spanish recogniser for continuously spelled names over the telephone. We analyse and compare three different recognition architectures. The first one is a Two level architecture. This approach consists in two steps. In the first one we obtain the most likely letter sequence using the one-pass algorithm. In the second step, to obtain the name recognised, we align the sequence of letters with the different dictionary names using a Dynamic Programming (DP) algorithm. The second alternative consists on an Integrated Architecture where a constrained grammar is built with all the names from the dictionary. In this case, we have a higher Name Recognition Rate but the time processing increases a lot. Finally, we propose a combined architecture with a good compromise between recognition rate and time consuming. This approach responds to a strategy of Hypothesis and Verification. In the hypothesis stage, we obtain the most likely letter sequence (one-pass algorithm) and then we select N-candidates from the dictionary with a dynamic programming algorithm. In the verification stage, we build a dynamic grammar with the N-candidates and we recognise over it. With this system we obtain a 96.1% Name Recognition Rate in real time for the 1,000 names dictionary and, 92.3% and 89.6% for 5,000 and 10,000 names directories respectively.


Cite as: San-Segundo, R., Colás, J., Ferreiros, J., Macías-Guarasa, J., Pardo, J.M. (2000) Spanish recogniser of continuously spelled names over the telephone. Proc. 6th International Conference on Spoken Language Processing (ICSLP 2000), vol. 2, 863-866

@inproceedings{sansegundo00_icslp,
  author={Ruben San-Segundo and José Colás and Javier Ferreiros and Javier Macías-Guarasa and Juan Miguel Pardo},
  title={{Spanish recogniser of continuously spelled names over the telephone}},
  year=2000,
  booktitle={Proc. 6th International Conference on Spoken Language Processing (ICSLP 2000)},
  pages={vol. 2, 863-866}
}