FU Qiang, YI Ke-chu. Bark Wavelet Transform of Speech and Its Application in Speech Recognition[J]. Acta Electronica Sinica, 2000, 28(10): 102-105.DOI:
This paper firstly describes a novel perceptual wavelet and its transform of speech
which is based on Bark frequency scale concept coming from the speech perceptual experiment.In the nature of physics
it consists with human's cochlea filter properties;in the sense of mathematics
Bark wavelet transform is a kind of non-orthonormal but overcomplete
reversible and self-inverting wavelet transform.When it is applied in speech recognition
small analysis frame-length is used by using the property of local base of wavelet transform
which can improve the time-domain resolution of front-end process.Experiment shows that the formed novel feature is superior to MFCC in the capability of distinguishing the consonants.