Aladdin Digital Infrared Language Distribution
Installation and User Manual
Televic Conference Systems
2011-09-01
11
1.2.
System Technology
This chapter describes the basic system concept, IR
radiation, signal processing, audio quality modes
and gives more information about carriers and
channels.
1.2.1.
Basic System Concept
The basic system concept is shown in Figure 1.2.
The system consists of a number (N) of audio
sources, either analogue or digital, which are
connected to a transmitter. The transmitter
processes the audio signals into an electrical output
to feed the infrared radiator (see section 1.2.3). The
infrared signal is received by the infrared receiver
that processes the signal and outputs an audio
signal and/or associated data.
Figure 1.2: The basic system concept
1.2.2.
IR Radiation
Aladdin series audio signal is based on transmission
by modulated infrared radiation. Infrared radiation
is part of the electro-magnetic spectrum, which is
composed of visible light, radio waves and other
types of radiation. Its wavelength is higher than that
of visible light.
Conference hall privacy: the congress venue itself
acts as a barrier to infrared signals escaping. As
infrared is unable to pass through opaque objects
such as walls the signal cannot be overheard.
Moreover, Aladdin series does not emit radio
radiation. Operating the system does not require a
radio frequency license, anywhere in the world.
Audio
source
Audio
source
Audio
source
Audio
source
Transmitter
Infrared
radiator
Infrared
receiver
N
