Isolated-Word Speech Recognition using Variable-Frame Length Normalization
Chan-Hu Sin, Hui-Jeong Lee, Byeong-Cheol Park · The Journal of the Acoustical Society of Korea · 1987
Length normalization by variable frame size is proposed as a novel approach to length normalization to solve the problem that the length variation of spoken word results in a lowing of recognition accuracy. This method has the advantage of curtailment of recognition time in the recognition stage because it can reduce the number of frames constructing a word compared with length normalization by a fixed frame size. In this paper, variable frame length normalization is applied to multisection vector quantization and the efficiency of this method is estimated in the view of recognition time and accuracy through practical recognition experiments.