Fig. 1
From: An acoustic echo canceller optimized for hands-free speech telecommunication in large vehicle cabins
A An overview of the proposed AEC algorithm which consists of the main “NLMS-based adaptive AEC” block accompanied by two decision circuits, i.e., “far-end voice activity detector” (VAD) and “double-talk detector” (DTD). The AEC algorithm runs only whenever the far end is active (i.e., “YES” switch is activated). The double-talk detector stops the AEC adaptation (sets \(\mu\) =0 in Eq. 2.b) if double talk is detected. B A driver in the FM928 Volvo truck serving as the near-end party during a hands-free phone conversation