Speech Enhancement Using Microphone Array with MMSE-STSA Estimator Based Post-Processing

MMSE-STSA 추정치에 기반한 후처리를 갖는 마이크로폰 배열을 이용한 음성 개선

In this paper, a speech enhancement system using microphone array with MMSE-STSA (Minimum Mean Square Error-Short Time Spectral Amplitude) estimator based post-processing is proposed. Speech enhancement is first carried out by conventional delay-and-sum beamforming (DSB). A new MMSE-STSA estimator is then obtained by refining MMSE-STSA estimators from each microphone, which is applied to the output of conventional DSB to obtain additional speech enhancement. Computer simulation for white and pink noises show that the proposed system is superior to other approaches.