Title :
Evaluation of an isolated word recognizer in talker-dependent and talker-independent modes using a large telephone-band data base
Author :
Rosenberg, A.E. ; Shipley, K.L.
Author_Institution :
AT&T Bell Laboratories, Murray Hill, New Jersey
Abstract :
An isolated word recognizer has been evaluated using a large data base of telephone-band digit utterances recorded by 100 talkers. Three reference template configurations of the recognizer have been studied, one talker independent and two talker dependent. The talker dependent configurations are a 1 template per word system obtained by robust training and a 5 template per word system. Performance has been studied in terms of the distribution of error rates across the three template configurations, the effect on performance of varying a decision rule parameter, applying a rejection threshold, and normalizing test and reference utterance lengths has also been investigated. Overall average error rates obtained are 2.17% for the talker independent system and 2.77% and 0.77% for the 1-template and 5-template talker dependent systems, respectively.
Keywords :
Acoustics; Digital recording; Error analysis; Linear predictive coding; Performance evaluation; Robustness; Speech analysis; Speech recognition; Testing; Vocabulary;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '84.
DOI :
10.1109/ICASSP.1984.1172348