標題: SPATIALLY PRE-PROCESSED TARGET-TO-JAMMER RATIO WEIGHTED FILTER AND METHOD THEREOF
作者: HU JWU-SHENG
LEE MING-TANG
公開日期: 19-Apr-2012
摘要: The present invention provides a spatially pre-processed target-to-jammer ratio weighted filter and a method thereof, which uses two microphones to receive audio signals. The audio signals are divided into a plurality of sinusoidal waves by a fast Fourier transform (FFT) module, and a beamformer uses the sinusoidal waves to generate beamformed signals. A reference generator generates at least one reference signal. The beamformed signals and reference signals are used to work out power spectral densities (PSD), and a target-to-jammer ratio (TJR) is worked out with the power spectral densities. TJR is used to determine whether a sound source exists. According to the determination result, a noise estimator is switched to eliminate noise from the beamformed signals and generate output signals. An inverse fast Fourier transform (IFFT) module recombines the output signals and then outputs the recombined signals.
官方說明文件#: G10K011/16
URI: http://hdl.handle.net/11536/105194
專利國: USA
專利號碼: 20120093333
Appears in Collections:Patents


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