Quality Modes; Carriers And Channels - Bosch Integrus Installation And Operation Manual

Integrus
5.
In the IR receivers a reverse processing is used to convert the modulated infra-red light to
separate analogue audio channels.
Audio
Channel
Audio
Channel
Figure 4.2 Overview of the signal processing (for one carrier)
4.1.3

Quality modes

The Integrus system can transmit audio in four different quality modes:
–
–
–
–
The standard quality mode uses less bandwidth and can be used for transmitting speech. For
music the premium quality mode gives near CD quality.
4.1.4

Carriers and channels

The Integrus system can transmit up to 8 different carrier signals (depending on the
transmitter type). Each carrier can contain up to 4 different audio channels. The maximum
number of channels per carrier is dependent on the selected quality modes. Stereo signals
use twice as much bandwidth as a mono signals, premium quality uses twice as much
bandwidth as standard quality.
Per carrier a mix of channels with different quality modes is possible, as long as the total
available bandwidth is not exceeded. The table below lists all possible channel combinations
per carrier:
Possible
number
of
channels
per
carrier
Bosch Security Systems B.V.
Radiation - Up to 8 modulated carrier signals are combined and sent to the IR radiators,
which convert the carrier signals to modulated infra-red light.
A/D Conversion
& Compression
4x 4x
A/D Conversion
& Compression
Mono, standard quality, maximum 32 channels
Mono, premium quality, maximum 16 channels
Stereo, standard quality, maximum 16 channels
Stereo, premium quality, maximum 8 channels
Channel quality
Mono Mono
Standard Premium
4
2 1
2
1
2
Installation and Operation manual
Protocol Creation
& Modulation
Stereo Stereo Bandwidth
Standard Premium
4 x 10 kHz
2 x 10 kHz and 1 x 20 kHz
1 2 x 10 kHz and 1 x 10 kHz (left)
and 1 x 10 kHz (right)
1 1 x 20 kHz and 1 x 10 kHz (left)
and 1 x 10 kHz (right)
2 2 x 10 kHz (left) and 2 x 10 kHz
(right)
2 x 20 kHz
1 1 x 20 kHz (left) and 1 x 20 kHz
(right)
Planning | en 17
Carrier (to IR Radiators)
IOM-INT | V1.1 | 2010.12