Acoustic Echo Cancellation: Algorithms and Implementation

The text mentions "acoustic echo cancellation," a commonly used technology in communication systems designed to eliminate echoes caused by sound leakage between microphones and speakers. This technology relies on digital signal processing algorithms to detect and filter echo signals in real-time, thereby improving communication quality. Key implementation approaches include: - Adaptive filtering algorithms (typically using NLMS or RLS methods) - Double-talk detection mechanisms to prevent signal distortion - Echo path delay estimation and impulse response modeling Acoustic echo cancellation technology is widely applied in voice calls, video conferences, VoIP systems, and other communication domains. It effectively enhances communication efficiency and user experience by maintaining signal clarity during full-duplex audio transmission. Typical implementation involves frame-based processing with overlap-add techniques, where each audio frame undergoes spectral analysis and adaptive filter coefficient updates based on the least mean squares (LMS) principle.