Patent ID: 8682664
Filing Date: 2014-03-25
Classification: G10H,G10L

Abstract:
1. A method for audio signal classification, comprising: obtaining, by a computer, a tonal characteristic parameter of an audio signal to be classified, wherein the tonal characteristic parameter of the audio signal to be classified includes a tonal characteristic parameter in a low-frequency sub-band of the audio signal to be classified and a tonal characteristic parameter in a relatively high-frequency sub-band of the audio signal to be classified; wherein the tonal characteristic parameter is a ratio between a number of tones in at least one sub-band and a total number of tones of the audio signal to be classified; determining, according to the obtained tonal characteristic parameter, a type of the audio signal to be classified; wherein the determining, according to the obtained tonal characteristic parameter, the type of the audio signal to be classified comprises: judging whether the tonal characteristic parameter in the low-frequency sub-band is greater than a first coefficient, and whether the tonal characteristic parameter in the relatively high-frequency sub-band is smaller than a second coefficient; if the tonal characteristic parameter in the low-frequency sub-band is greater than the first coefficient, and the tonal characteristic parameter in the relatively high-frequency sub-band is smaller than the second coefficient, determining that the type of the audio signal to be classified is a voice type; if the tonal characteristic parameter in the low-frequency sub-band is not greater than the first coefficient, or the tonal characteristic parameter in the relatively high-frequency sub-band is not smaller than the second coefficient, determining that the type of the audio signal to be classified is a music type; and obtaining a spectral tilt characteristic parameter of the audio signal to be classified; wherein the determining, according to the obtained tonal characteristic parameter, the type of the audio signal to be classified comprises: wherein the obtaining the spectral tilt characteristic parameter of the audio signal to be classified comprises: