Signal classifying method and apparatus

Details Signal classifying method and apparatus Signal classifying method and apparatus

2011-04-12

2011-11-01

Albertalli, Brian (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S206000, C704S253000, C381S110000

Reexamination Certificate

active

08050916

ABSTRACT:
A signal classifying method and apparatus are disclosed. The signal classifying method includes: obtaining a spectrum fluctuation parameter of a current signal frame determined as a foreground frame, and buffering the spectrum fluctuation parameter; obtaining a spectrum fluctuation variance of the current signal frame according to spectrum fluctuation parameters of all buffered signal frames, and buffering the spectrum fluctuation variance; and calculating a ratio of signal frames whose spectrum fluctuation variance is above or equal to a first threshold to all the buffered signal frames, and determining the current signal frame as a speech frame if the ratio is above or equal to a second threshold or determining the current signal frame as a music frame if the ratio is below the second threshold. In the embodiments of the present invention, the spectrum fluctuation variance of the signal is used as a parameter for classifying the signals, and a local statistical method is applied to decide the type of the signal. Therefore, the signals are classified with few parameters, simple logical relations and low complexity.

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