From the Wires
OKI Develops Compact Sound Source Separation (SSS) Microphone Module with Ambient Voice Suppressor (AVS) Technology
By: Business Wire
Jan. 28, 2013 09:00 PM
OKI (TOKYO:6703) has developed an ambient voice suppressor (AVS) technology that accurately extracts voice periods and suppresses noise, and a compact sound source separation (SSS) microphone module based on this technology. Achieving significant improvements in separating and extracting the speaker's voice from surrounding noise, the AVS technology makes possible stress-free communications via smartphones and other mobile devices in noisy environments, such as exhibition halls, inside vehicles, train stations, and so on.
Smartphones have grown increasingly popular in recent years and are often used in hands-free for teleconferencing or other purposes, as well as for ordinary phone calls. When a mobile phone is used for hands-free calls in noisy public locations, the phone's microphone might pick up surrounding voices and background noise, generating howling or degrading speech communication quality.
"To counter these problems, OKI has developed AVS technology based on many years of research on sound source separation.1" says Takeshi Kamijoh, General Manager of Research and Development Center at OKI. "AVS technology uses multiple microphones to suppress surrounding voices and background noise. In the verification test using a newly-developed compact SSS microphone module in which AVS is embedded, we confirmed that the technology provides improved clarity in noisy environments (bus terminals and train platforms)."
OKI plans to promote the use of compact SSS microphone modules and sound source separation software featuring the AVS technology in information communication devices and continue to develop for further applications.
Some developments related to AVS were based on the joint development with Professor Tetsunori Kobayashi, Waseda University.
Features of the compact SSS microphone module incorporating AVS
The AVS technology can improve not only mobile devices like smartphones, but also various other products with voice communication functions such as intercoms and videoconferencing systems, etc. The compact SSS microphone module is also suitable for ATMs, ticket-vending machines, and other technology incorporating voice communication functions.
2. Preventing speech recognition system from false recognition
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