Title :
A confidence based tree structured decoder for private automatic branch exchange
Author :
Jing Liu ; Liu, Jing ; Zhu, Xuan ; Xu, Bo
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
A high performance voice controlled private automatic branch exchange (PABX) is difficult to achieve, especially when users are not required to follow a rigid speaking format. By incorporating hierarchical confidence measures into a tree structured PABX decoder, the keyword accuracy is increased from 89.86% to 92.63%. Further improvement is made by a confidence measure based postprocessor, which rejects 5.68% of all testing utterances and improves the accuracy to 97.18%
Keywords :
decoding; hidden Markov models; private telephone exchanges; speech coding; speech recognition; tree data structures; PABX; confidence based tree structured decoder; confidence measure based postprocessor; hierarchical confidence measures; high performance voice controlled private automatic branch exchange; tree structured PABX decoder; Acoustic measurements; Automatic control; Automatic speech recognition; Decoding; Hidden Markov models; Laboratories; Speech coding; Speech recognition; Testing; Vocabulary;
Conference_Titel :
Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-5747-7
DOI :
10.1109/ICOSP.2000.891626
