초록 ▼

The hybrid adaptive beamformer of the present invention includes a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs from the sound energy. A processor produces a plurality of first order beams based on the microphone

The hybrid adaptive beamformer of the present invention includes a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs from the sound energy. A processor produces a plurality of first order beams based on the microphone outputs. The processor determines an amount of reverberation in the external environment and adaptively produces a second order output beam taking into consideration the determined amount of reverberation. The processor may determine the amount of reverberation based on a comparison of the first order beams. The processor may produce the second order output beam by adaptively combining the plurality of first order beams, as further described below, or by adaptively combining the microphone outputs. The adaptation varies taking into consideration the determined amount of reverberation. Alternatively, the adaptation may vary by measuring the signal-to-noise ratio of the first order beams and adaptively combining the first order beams based on the determined signal-to-noise ratios.

대표청구항 ▼

[ What is claimed is:] [1.] A hybrid adaptive beamformer comprising:a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs based on the sound energy; anda processor producing a plurality of first order beams based on the

[ What is claimed is:] [1.] A hybrid adaptive beamformer comprising:a plurality of microphones for receiving sound energy from an external environment and for producing a plurality of microphone outputs based on the sound energy; anda processor producing a plurality of first order beams based on the microphone outputs, the processor determining an amount of reverberation in the external environment and adaptively producing a second order output beam based on the determined amount of reverberation.