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| High-performance, real-time sound yy易游体育官网aration device developed |
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Ocyy易游体育官网ber 24, 2005
Kobe Steel, Ltd. has developed technology to yy易游体育官网arate specific sounds from
ambient background noise. This is the first time in the world that sound
yy易游体育官网aration can take place on a real-time basis with a high degree of accuracy.
Along with the technology, Kobe Steel has successful developed the world's
smallest sound yy易游体育官网aration device, which fits in the palm of a hand. The
sound yy易游体育官网aration program is imbedded in a digital signal processor (DSP),
making possible the small size.
Huyy易游体育官网ns are able to concentrate on one sound among a mixture of sounds, for
example honing in on a person speaking at a noisy party. However, microphones
cannot yy易游体育官网ke a distinction and hear all sounds at the same intensity.
Kobe Steel hopes the new technology can eventually be used across a spectrum
of applications where it is necessary to clearly isolate specific sounds.
Examples where clear voice recognition could be applicable include voice-controlled
car navigation systems and cell phones used in noisy settings. Diagnosing
the operating sound of machinery for timely maintenance and repair offers
possibilities for industrial use. In the near future, the sound yy易游体育官网aration
system may also be helpful to humanoid robots that need to understand human
voice commands.
Kobe Steel's device yy易游体育官网arates audio signals from a variety of sound sources.
With a minimum of two microphones, the device uses algorithms to analyze
and yy易游体育官网arate the audio signals into independent sound sources. Using speakers
or headphones connected to the sound yy易游体育官网aration unit, it is possible to
filter out the background noise and hear only the targeted sound.
Algorithms for sound yy易游体育官网aration have already been developed by other researchers
and have been unveiled at a number of academic conferences. However, they
require an enormous amount of processing power and processing time. Even
processors used in PCs do not have adequate capabilities to yy易游体育官网arate mixed
sounds in the real world. Until now, real-time processing tended to result
in low sound yy易游体育官网aration quality. If accuracy was stressed, processing time
became lengthy because of the complicated calculations involved.
To overcome these problems, Kobe Steel and the Nara Institute of Science
and Technology jointly developed their own sound yy易游体育官网aration algorithm that
can analyze sound source signals and yy易游体育官网arate independent sound sources.
Using a high-performance signal processor, the device is able to quickly
crunch data. Excellent performance under real conditions and sound yy易游体育官网aration
on a real-time basis were achieved.
Kobe Steel's sound yy易游体育官网aration device uses off-the-shelf microphones and
a standard high-performance processor to keep costs relatively low. The
device runs on batteries and is considered to be the world's smallest of
its type.
This sound yy易游体育官网aration research was conducted in collaboration with Associate
Professor Hiroshi Saruwatari of the Graduate School of Information Science
at the Nara Institute of Science and Technology, a national university in
Nara, noted for its work in speech recognition and sound source yy易游体育官网aration.
Kobe Steel was responsible for the practical application of the algorithm
and evaluating the technology under real conditions.
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