Speaking rate control based on time-scale modification and its effects on the performance of speech recognition. (1st January 2014)

• Record Type: Journal Article
• Authors: Kang, Jin Ah; Choi, Seung Ho
• Is Part Of: International journal of engineering systems modelling and simulation. Volume 6:Number 1/2(2014)
• Page Start: 31
• Page End: 36
• Publication Date: 2014-01-01
• Subjects: speaking rate control -- time-scale modification -- TSM -- speech recognition; Engineering systems -- Computer simulation -- Periodicals; Engineering systems -- Mathematical models -- Periodicals; 620.0042
• Languages: English
• ISSNs: 1755-9758

Abstract

In this paper, we describe the influence of speaking rate on speech recognition. Speaking rate of input speech is controlled by applying a time-scale modification (TSM) algorithm and speaking rate normalisation is achieved by selecting a scale factor of TSM. The scale factor selection for training and testing of a speech recognition system is performed based on a maximum likelihood criterion during HMM decoding. From the experimental results, we showed that optimal selection of a TSM scale factor in speaking rate normalisation can reduce WER by 47.6% compared to the baseline.