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| This page introduces the
1-bit quantization and 1-bit transmission technologies used
in VoiceUbique. |
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VoiceUbique uses 1-bit quantization
technology*, which is commonly employed in high-quality digital
audio systems, to convert a continuous audio signal into a compressional
wave of pulses, which is then transmitted as a digital signal
using infrared rays (IrDA physical layer). In the receiver,
the received pulses drive a speaker through a passive filter.
This guarantees high-quality sound reproduction.
This transmission technology eliminates D/A converters and other
circuits, which are needed in conventional digital audio communication,
thereby making it possible to reduce the size of the system
while providing sound quality as good as FM (signal bandwidth:
16kHz; SN ratio: 70dB). |
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1-bit quantization technology:
technology for converting audio signals into a compression wave
of pulses using an A/D and D/A conversion technique known as
noise shaping, which is now commonly used in digital audio devices,
such as CD and MD players. Because this conversion technique
produces high quality sound, it is used in high-grade audio
systems. |
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