Echo Cancellation - Everything You Need To Know

What's this blog post about?

Echo Cancellation is a digital signal processing technique that eliminates acoustic echo during video calls, ensuring clear communication. It was initially developed in the mid-20th century to reduce echo problems in long-distance telephone communications. The advent of digital signal processing (DSP) in the 1970s led to more sophisticated methods for handling signals and the development of the first real echo cancellers. Adaptive algorithms, such as Least Mean Squares (LMS), were introduced in the 1980s to dynamically adjust to varying line conditions. Today, echo cancellation technology is integrated into various communication systems, including teleconferencing, voice assistants, and more. It uses adaptive algorithms to identify and eliminate echo while maintaining full-duplex communication. The integration of machine learning and AI has further enhanced its capabilities, allowing for more precise and efficient echo identification and elimination in complex acoustic environments.


Date published
Dec. 15, 2023

John Selvinraj

Word count

Hacker News points
None found.


By Matt Makai. 2021-2024.