Discriminating between stationary and non-stationary signals

Details Discriminating between stationary and non-stationary signals Discriminating between stationary and non-stationary signals

1994-05-25

1996-11-26

Tung, Kee Mei

395 235, G10L 302

Patent

active

055794327

ABSTRACT:
A discriminator discriminates between stationary and non-stationary signals. The energy E(T.sub.i) of the input signal is calculated in a number of windows T.sub.i. These energy values are stored in a buffer, and from these stored values a test variable V.sub.T is calculated. This test variable comprises the ratio between the maximum energy value and the minimum energy value in the buffer. Finally, the test variable is tested against a stationarity limit .gamma.. If the test variable exceeds this limit the input signal is considered non-stationary. This discrimination is especially useful for discriminating between stationary and non-stationary background sounds in a mobile radio communication system.

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