11th Annual Conference of the International Speech Communication Association

Makuhari, Chiba, Japan
September 26-30. 2010

Phone Mismatch Penalty Matrices for Two-Stage Keyword Spotting via Multi-Pass Phone Recognizer

Chang Woo Han, Shin Jae Kang, Chul Min Lee, Nam Soo Kim

Seoul National University, Korea

In this paper, we propose a novel approach to estimate three types of phone mismatch penalty matrices for two-state keyword spotting. When the output of a phone recognizer is given, text matching with the phone sequences provided by the specified keyword using the proposed phone mismatch penalty matrices is carried out to detect a specific keyword. The penalty matrices which is estimated from the training data through deliberate error generation are accounting for substitution, insertion and deletion errors. In comparative experiments on a Korean continuous speech recognition task, the proposed approach has shown a significant improvement.

Full Paper

Bibliographic reference.  Han, Chang Woo / Kang, Shin Jae / Lee, Chul Min / Kim, Nam Soo (2010): "Phone mismatch penalty matrices for two-stage keyword spotting via multi-pass phone recognizer", In INTERSPEECH-2010, 202-205.