Fig. 4From: Efficient multichannel acoustic echo cancellation using constrained tap selection schemes in the subband domain a Waveform of a 10-s segment from the soundtrack of a five-channel movie signal, with different channels distinguished by color; magnitude spectrogram of (b) centre (C), (c) front left (FL), (d) front right (FR), (e) side left (SL), and (f) side right (SR) channels, respectivelyBack to article page