From broadcast news to spontaneous dialogue transcription: portability issues
Nicola Bertoldi, E. Brugnara, Mauro Cettolo, Marcello Federico, Diego Giuliani · 2002
Reports on experiments of porting the ITC-irst Italian broadcast news recognition system to two spontaneous dialogue domains. The trade-off between performance and the required amount of task specific data was investigated. Porting was experimented by applying supervised adaptation methods to acoustic and language models. By using two hours of manually transcribed speech, word error rates of 26.0% and 28.4% were achieved by the adapted systems. Two reference systems, developed on a larger training corpus, achieved word error rates of 22.6% and 21.2%, respectively.