Patent ID: 8438021
Filing Date: 2013-05-07
Classification: G10L

Abstract:
1. A signal classifying method, comprising: obtaining a spectrum fluctuation parameter of a signal frame; buffering the spectrum fluctuation parameter of the signal frame in a first buffer array if the signal frame is a foreground frame; if the signal frame falls within a first number of initial signal frames, setting a spectrum fluctuation variance of the signal frame to a specific value and buffering the spectrum fluctuation variance of the signal frame in a second buffer array; otherwise, obtaining the spectrum fluctuation variance of the signal frame according to spectrum fluctuation parameters of a plurality of first buffered signal frames buffered in the first buffer array and buffering the spectrum fluctuation variance of the signal frame in the second buffer array; and calculating a ratio of signal frames whose spectrum fluctuation variance is above or equal to a first threshold to a plurality of second buffered signal frames buffered in the second buffer array, and determining the signal frame as a speech frame if the ratio is above or equal to a second threshold or determining the signal frame as a music frame if the ratio is below the second threshold.