One-page reference: the four AEC stages (delay estimate, adaptive filter, double-talk detector, residual suppressor), the device-by-device difficulty table, the ERLE and filter-tap arithmetic, and six things to remember including the double-talk test and the Bluetooth caveat.
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The book · Volume 4 of 7
Audio for Video: A Complete Guide to Sound in Video Products: From PCM and Codecs to Loudness, Accessibility, and Real-Time Voice Processing
This field guide breaks acoustic echo cancellation into four stages and gives the ERLE and filter-tap arithmetic, so you can tell which stage fails on which device. Volume 4 covers real-time voice processing in depth: AEC, AGC, noise suppression and VAD, plus sampling, bit depth and dynamic range that set the limits of any canceller. Written by Nikolay Sapunov, CEO at Fora Soft.
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