Researchers Advance Echo Cancellation Technology

Faculty of Engineering is patented for improving echo cancellation technology. Credit: @mckinsey_design.

Have you ever heard your voice speak to you on the phone? That’s annoying. Therefore, people have developed a filter that adapts to the sound of the room and removes this echo (technical term is echo cancellation).

Electrical and Computer Engineering professors Todd Moon and Jacob Gunther have improved these filters by canceling echoes when people at both ends of the call are speaking at the same time, one of the weaknesses of these filters. .. Advances in echo-cancellation technology were recognized in a patent issued on March 2.

As Moon explains, these filters work very well when only one person is speaking.But obviously Telephone conversation—Especially in conference call settings — “double talk” always occurs.

“In a normal conference room setting, these adaptive filters can’t be adapted when both people are talking at the same time. In fact, they shut things down and have strange effects,” he said. It was. “What I’m doing with this patent is to come up with an adaptive learning algorithm that makes it easier for cancellers to adapt.”

A learning algorithm developed by Moon can separate different audio signals from the person who is speaking or from the person who is speaking. Ambient noise— Faster than regular filters to prevent spooky feedback. It uses a process called blind source isolation. This is blind because you don’t need to know where the acoustic signal is coming from.

Moon and Gunther hope that this technology will improve the performance of conference calls and the experience of conference calls, but there are many other applications. in the future, echo Cancellation allows the user to talk to the TV instead of using it. Remote controllerThis is an important technology for providing hands-free voice control for computers and other devices.

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Quote: Double Talk Deleted: Researchers obtained echo cancellation on April 7, 2021 from https: // Advance technology (April 7, 2021)

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