In this paper, we describe the BBN 2007 Mandarin speech-to-text system developed for the GALE Evaluation 2007. In comparison to the BBN 2006 Mandarin system, we achieved 25% relative reduction in character error rate on the most important test sets. The utilization of all available training data provided the largest contribution to the improvement. The use of a better pitch tracking algorithm also contributed significantly, while system combination made some noticeable improvement too.
['Truong Ng', 'Bing Zhang 0004', 'Kham Nguyen', 'Long Nguyen']
Progress in the BBN 2007 Mandarin Speech to Text system