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necessity. The translators translate the original
language, then the translated language is distributed
all over the whole meeting hall and the receiver
select the language they need and can hear it with the
earphone.
◆
Using IR to transmit
IR is part of the electromagnetic radiation spectrum,
which includes visible light, radio wave and other
radiation wave. The wave length of IR is longer than
the visible light, thus, IR cannot penetrate the walls
and ceiling. In this way, the confidentiality of the
meeting can be ensured, tapping and interference can
be avoided. VISSONIC’s IR Simultaneous Translation
System uses the IR modulated by DQPSK to transmit
the signal. At the same time, this system also needs
radio frequency permission.
◆
Advanced digital technology
Full-digital DQPSK modulation technology has been
used to gain high frequency usage and strong anti-
interference ability.
The system applies full-digital audio processing
technology to ensure the high audio quality, eliminate
overhearing between channels and noise etc.
◆
Free from the interference of fluorescent light
The traditional IR Simultaneous Translation
System is easily interfered by the fluorescent light.
VISSONIC has applied unique technology and has
solved this problem thoroughly. It works on 2-6MHZ
frequency, and avoided the interference from various
kinds of lighting sources.
◆
Flexible channel selection
VISSONIC has left huge flexibility to the users
while designing the channels, and has provided 32
general quality audio channels. (31 different
translation channel + 1 original voice). The general
quality channels take smaller bandwidth and can be
used to transmit audio
signals.
◆
Flexible and convenient using methods
Using the IR system gives the delegates the
freedom of going around the whole meeting
room., because the signal transmit in the air, and the
system has no physical connection, thus the activities
can only be limited by the walls of the meeting room.
The IR receiver is light and delicate, which can be put
in the pocket of the user’s T-Shirt or coat.
◆
Simple Installation and maintenance
The system is easy to install (the time it takes
depends on the allocation and correction of the
radiating panels). The only job to be done is connect
the equipments together, and maintenance is just
charging.
Once the installation is finished, the system can
be expanded any time. If the meeting scale enlarges,
what have to be done is just add more IR receivers in
to the system, and the basic structure doesn’t have to
be changed.
1.4
Factors that affect the IR
radiation
1.4.1
The directivity of receiving and emitting
VISSONIC digital IR distribution system has
wide receiving angle, which can allow the receiver to
get perfect sound quality no matter how they are
placed. Please check Fig.1-1.
VISSONIC radiating panel’s cover area is a
ellipse, which means as the distance gets larger, the
dimension of the radiation area gets larger till a certain
limit is reached. Please check the Fig.1-2 “radiating
panel coordinate illustration.
Digital IR Language Distribution System User Manual
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