Research on Inaudible Speech Recognition based on the Center-of-Balance Transition Method on Wavelet Coefficients of Surface EMG Signals

2016 Fiscal Year Final Research Report

• Project/Area Number: 25330198
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Perceptual information processing
• Research Institution: Kyushu Institute of Technology
• Principal Investigator: NAGAI Hidetoshi 九州工業大学, 大学院情報工学研究院, 助教 (60237485)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 黙声認識 / 無発声音声認識 / サイレント音声認識 / 表面筋電 / ウェーブレット解析 / ウェーブレット重心 / 重心推移法

Outline of Final Research Achievements

The purpose of this research is to recognize natural inaudible speech based on surface EMG signals around lips. During this research period, I studied the recognition method using the center-of-balance transition method on wavelet coefficients of surface EMGs.
A person performs a natural continuous utterance with gentle change of lip shape. Therefore, in order to obtain a good recognition result, it is necessary to identify the proper positions to extract the features for recognition. As such positions, I propose methods to detect the change point of phonemes and the peak point of lip shape change based on center-of-balance transition. However, the first place accuracy rate of the recognition result of continuous vowels is about 60 %. It shows that further improvement is necessary.

Free Research Field

生体信号処理