A binaural system for the suppression of late reverberation

The propriety of spatial decorrelation of late reverberation has often been used in binaural systems of dereverberation [1] [2]. However, the use of a small array of two microphones limits the performance of such systems, especially at low frequencies. We present in this paper a new algorithm, derived from the classical method proposed by Bloom et al. [2] [3]. Both methods are assessed in terms of gain in signal to noise ratio (SNR), noise reduction, distortion and improvement in performances of automatic speech recognition. The proposed method leads to better noise reduction and consistent improvement in speech recognition scores.