8th International Conference on Spoken Language Processing

Jeju Island, Korea
October 4-8, 2004

Task Adaptation of Acoustic and Language Models Based on Large Quantities of Data

Karthik Visweswariah, Ramesh Gopinath, Vaibhava Goel


We investigate use of large amounts, over 1500 hours, of untranscribed data recorded from a deployed conversational system to improve the acoustic and language models. The system that we considered allows users to perform transactions on their retirement accounts. Using all the untranscribed data we get over 19% relative improvement in word error rate over a baseline system. In contrast, a system built using 70 hours of transcribed data results in over 31% relative improvement.

Full Paper

Bibliographic reference.  Visweswariah, Karthik / Gopinath, Ramesh / Goel, Vaibhava (2004): "Task adaptation of acoustic and language models based on large quantities of data", In INTERSPEECH-2004, 1977-1980.