Noise robustness of Spectrum Delta (SpD) features in Malay vowel recognition

• Main Authors: Mohd Yusof, Shahrul Azmi, Mahat, Nor Idayu, Din, Roshidi, Yaakub, Abdul Razak, Yaacob, Sazali
• Format: Article
• Published: Springer 2012
• Subjects: QA76 Computer software
• Online Access: http://repo.uum.edu.my/10141/; http://dx.doi.org/10.1007/978-3-642-35594-3_38

In Malaysia, there is increasing number of speech recognition researchers focusing on developing independent speaker speech recognition systems that uses Malay Language which are noise robust and accurate.The performance of speech recognition application under adverse noisy condition often becomes the topic of interest among speech recognition researchers regardless of the languages in use. This paper present a study of noise robust capability of an improved vowel feature extraction method called Spectrum Delta (SpD).The features are extracted from both original data and noise-added data and classified using three classifiers; (i) Multinomial Logistic Regression (MLR), (ii) K-Nearest Neighbors (k-NN) and (iii) Linear Discriminant Analysis (LDA).Results show that the proposed SpD is robust towards noise and LDA performs the best in overall vowel classification compared to MLR and k-NN in terms of robustness capability especially with signal-to-noise (SNR) above 20dB.