A frequency-weighted Itakura spectral distortion measure and its application to speech recognition in noise
Frank K. Soong, M. M. Sondhi · IEEE Transactions on Acoustics Speech and Signal Processing · 1988
The authors propose an adaptively weighted Itakura distortion measure. They studied its effects on the performance of a conventional dynamic time-warping (DTW)-based speech recognizer in a series of speaker-independent, isolated-digit-recognition experiments. The equivalent SNR improvement achieved by using the proposed weighted Itakura distortion at low SNRs is about 5-7 dB.>