Front-End Signal Processing for Far-Field Speech Communication

Devices for speech communication operated in handsfree mode offer a very natural way of human communication. However, the signal-to-noise ratio (SNR) at the microphones of the device is typically low. This requires appropriate front-end signal processing (FESP) to enhance the desired speech signal.A beamformer (BF) can use the microphones of multiple devices to compensate for the low initial SNR, if all microphone positions are known. For estimating these positions the novel orthogonal geometri ...