Name
Title | ||
|---|---|---|
An investigation of single-pass ASR system combination for spoken language understanding |
Abstract | ||
|---|---|---|
This paper studies the benefits provided by a single-pass Automatic Speech Recognition (ASR) exchange-based combination approach for spoken dialog system. Three famous open-source ASR systems are used to experiment this approach in the framework of Spoken Language Understanding (SLU). On the ASR side, single-pass ASR systems are used with an online acoustic model adaptation using the previous utterances said by a speaker. On the SLU side, a competitive CRF-based SLU system is applied on outputs of ASR system to obtain the semantic concepts. The evaluation is done on the French PORT-MEDIA test data in terms of both Word Error Rate (WER) and Concept Error Rate (CER). While the best single pass system used alone shows a CER of 29.8% for a WER of 22.8%, single-pass ASR exchange-based combination reaches a CER of 27.3% for a WER of 26%. This CER is only slightly higher than the one reached by a 5-passes ASR system which obtained a CER of 26.8% for a WER of 22.8% in better conditions, i.e. better acoustic model adaptation made on all the speech utterances said by a speaker, advanced feature extraction techniques and search graph rescoring using language model with higher order. |
Year | DOI | Venue |
|---|---|---|
2013 | 10.1007/978-3-642-39593-2_5 | SLSP |
Keywords | Field | DocType |
famous open-source asr system,asr side,competitive crf-based slu system,asr system,dialog system,single-pass asr system,single pass system,5-passes asr system,language understanding,slu side,single-pass asr system combination,single-pass asr exchange-based combination,automatic speech recognition | Single pass,System combination,Computer science,Word error rate,Feature extraction,Speech recognition,Natural language processing,Artificial intelligence,Test data,Language model,Spoken language,Acoustic model | Conference |
Citations | PageRank | References |
0 | 0.34 | 13 |
Authors | ||
5 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Fethi Bougares | 1 | 1386 | 67.48 |
| Mickael Rouvier | 2 | 79 | 15.32 |
| Nathalie Camelin | 3 | 39 | 14.29 |
| Paul Deléglise | 4 | 211 | 29.62 |
| Yannick Estève | 5 | 298 | 50.89 |