论文标题
辅助RTF-vector基于校准的外部麦克风阵列的到达估计的双脉冲方向
Assisted RTF-Vector-Based Binaural Direction of Arrival Estimation Exploiting a Calibrated External Microphone Array
论文作者
论文摘要
最近，已经提出了一种基于基于外部麦克风的双耳助听器设置的基于相对传递函数（RTF） - 向量的方法来估计目标扬声器的到达方向（DOA）进行双耳助听器设置。该方法利用了外部麦克风来估计与双耳助听器相对应的RTF载体，并通过将估计的RTF载体与多个方向的肛门原型RTF矢量数据库进行比较，构建了一维空间光谱。在本文中，我们假设校准的外部麦克风阵列的可用性为特征，其特征是第二个Anechoic原型RTF载体的数据库。我们提出了一种方法，其中利用外部麦克风来估计与双耳助听器相对应的RTF矢量，而且还有助于估计目标扬声器的DOA。基于所有麦克风和两个原型数据库的估计RTF矢量，构建了二维空间光谱，从该光谱中估算了DOA。带有分散的噪声的混响环境的实验结果表明，辅助DOA估计的表现优于DOA估计，其中未使用表征外部麦克风阵列的原型数据库。
Recently, a relative transfer function (RTF)-vector-based method has been proposed to estimate the direction of arrival (DOA) of a target speaker for a binaural hearing aid setup, assuming the availability of external microphones. This method exploits the external microphones to estimate the RTF vector corresponding to the binaural hearing aid and constructs a one-dimensional spatial spectrum by comparing the estimated RTF vector against a database of anechoic prototype RTF vectors for several directions. In this paper we assume the availability of a calibrated array of external microphones, which is characterized by a second database of anechoic prototype RTF vectors. We propose a method, where the external microphones are not only exploited to estimate the RTF vector corresponding to the binaural hearing aid but also assist in estimating the DOA of the target speaker. Based on the estimated RTF vector for all microphones and both prototype databases, a two-dimensional spatial spectrum is constructed from which the DOA is estimated. Experimental results for a reverberant environment with diffuse-like noise show that assisted DOA estimation outperforms DOA estimation where the prototype database characterizing the array of external microphones is not used.
