|[January 28, 2013]
OKI Develops Compact Sound Source Separation (SSS) Microphone Module with Ambient Voice Suppressor (AVS) Technology
TOKYO --(Business Wire)--
OKI (TOKYO:6703) has developed an ambient voice suppressor (AVS (News - Alert))
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 (News - Alert) 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)."
KI 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
Improved voice call quality
The technology improves the clarity of
the speaker's voice by suppressing background noise and surrounding
voices in noisy environments. Sound diffraction occurred by hands-free
conversations under extremely noisy conditions often generates howling.
The AVS suppresses diffracted sound components, which eliminate howling
and ensure clear voice communication.
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
of today's smartphones and car-mounted navigation systems have voice
search functions with speech recognition technologies. In noisy
locations, these functions might erroneously respond to not the
user-speaker's voice but others. Under these conditions, the compact SSS
microphone module suppresses surrounding voices and prevents the speech
recognition system from false recognition.
1 Sound source separation
technology that extracts just the target sound source from a mixed sound
including multiple-source sounds and various background noises.
About OKI Electric Industry (OKI)
Founded in 1881,
OKI Electric Industry is Japan's leading telecommunications manufacturer
in the Info-telecom field. Headquartered in Tokyo, Japan, OKI provides
top-quality products, technologies, and solutions to customers through
its info-telecom systems and printer operations. Its various business
divisions function synergistically to bring to market exciting new
products and technologies that meet a wide range of customer needs in
various sectors. Visit OKI's global website at http://www.oki.com/.
The names of the companies and products mentioned in this document are
the trademarks or registered trademarks of the respective companies
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