Name
Abstract | ||
|---|---|---|
This paper considers training data selection for discriminative training of acoustic models for broadcast news speech recognition. Three novel data selection approaches were proposed. First, the average phone accuracy over all hypothesized word sequences in the word lattice of a training utterance was utilized for utterance-level data selection. Second, phone-level data selection based on the difference between the expected accuracy of a phone arc and the average phone accuracy of the word lattice was investigated. Finally, frame-level data selection based on the normalized frame-level entropy of Gaussian posterior probabilities obtained from the word lattice was explored. The underlying characteristics of the presented approaches were extensively investigated and their performance was verified by comparison with the standard discriminative training approaches. Experiments conducted on the Mandarin broadcast news collected in Taiwan shown that both phone-and frame-level data selection could achieve slight but consistent improvements over the baseline systems at lower training iterations. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1109/ASRU.2007.4430125 | ASRU |
Keywords | Field | DocType |
broadcast news speech recognition,speech recognition,acoustic model,utterance-level data selection,phone-level data selection,hypothesized word sequence,acoustic models,data selection,normalized frame-level entropy,discriminative training,gaussian processes,frame-level data selection,word lattice,gaussian posterior probability,entropy,probability,posterior probability | Broadcasting,Normalization (statistics),Pattern recognition,Computer science,Speech recognition,Posterior probability,Phone,Gaussian,Artificial intelligence,Gaussian process,Discriminative model,Mandarin Chinese | Conference |
ISBN | Citations | PageRank |
978-1-4244-1746-9 | 10 | 0.54 |
References | Authors | |
14 | 5 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Shih-Hung Liu | 1 | 66 | 14.53 |
| Fang-hui Chu | 2 | 30 | 2.05 |
| Shih-Hsiang Lin | 3 | 142 | 14.07 |
| Hung-Shin Lee | 4 | 53 | 9.76 |
| Berlin Chen | 5 | 479 | 37.69 |