ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 1 INTEGRUS Tech ST 03.Mar.06 System Technology  System Block Diagram System Block Diagram  Infra-Red Radiation Infra-Red Radiation  Signal Processing Signal Processing  Audio Channel Quality Modes Audio Channel Quality Modes  Carriers and Channels Carriers and Channels  Audio Encoding and Quality Audio Encoding and Quality  Transmission Protocol Transmission Protocol I&O Manual

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 2 INTEGRUS Tech ST 03.Mar.06 DCN Next Generation Integrus Radiator Audio sources Interpreters desks 6ch. DCN system Diagram Digital Infra-Red Transmission System Integrus Trans- mitter Up to 32 Channels Integrus Receiver Integrus Receiver Transmission Protocol Integrus Charging equipment Integrus Charging equipment Integrus Radiator Integrus Receiver Integrus Receiver Integrus Receiver Integrus Receiver Integrus Receiver Integrus Receiver

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 3 INTEGRUS Tech ST 03.Mar.06 Infra Red Radiation  Based on transmission by modulated infra-red radiation.  Has a wavelength just above that of visible light.  Like visible light, it is reflected from hard surfaces, yet passes through translucent materials such as glass.  Radiators are used to emission infra-red light with a wavelength of 870 nm.

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 4 INTEGRUS Tech ST 03.Mar.06 Infra- Red spectrum in relation to other spectra % nm 1 Daylight spectrum 1 2 Sensitivity of the human eye Sensitivity of the human eye 2 3 Intra- Red radiator 3 4 Sensitivity of the Infra- Red diode at the receiver 4 5 Sensitivity of the Infra- Red diode at the receiver with daylight filter 5

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 5 INTEGRUS Tech ST 03.Mar.06 Signal Processing  The Integrus system uses high frequency carrier signals (typically 2-8 MHz) to prevent interference problems with modern light sources.  The transmission system converts analogue audio signals to digital frequency modulated infra-red light.  The digital audio processing guarantees a constant high audio quality.  Receivers pick up the digital frequency modulated infra-red signal and convert it back to an audio signal for a headphone. Audio Channel 01 Protocol Creation & Modulation Protocol Creation & Modulation Carrier (to IR Radiator) A/D Conversion & Compression A/D Conversion & Compression 4x A/D Conversion & Compression A/D Conversion & Compression Audio Channel 04

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 6 INTEGRUS Tech ST 03.Mar.06 Signal Processing main steps 1.A/D conversion - Each analogue audio channel is converted to a digital signal. 2.Compression - To increase the amount of digital information. 3.Protocol Creation - Groups of four digital signals are combined into one digital information stream. Fault algorithm information is added for fault detection and correction. 4.Modulation - A high frequency carrier signal is phase-modulated with the digital information stream. 5.Radiation – Up to 8 modulated carrier signals are combined and sent to the infra-red radiators, which convert the carrier signals to modulated infra-red light. 6.De-Modulation – a reversed process is used in the IR receivers to convert the modulated infra-red light to separate analogue audio channels.

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 7 INTEGRUS Tech ST 03.Mar.06 Audio Channel Quality modes  Up to four different audio channel quality modes: 1) Mono,standard quality,maximum 32 channels of 10kHz 2) Mono,premium quality,maximum 16 channels of 20kHz 3) Stereo,standard quality,maximum 16 channels of 2x 10kHz 4) Stereo,premium quality,maximum 8 channels of 2x 20kHz  The Standard quality mode uses less bandwidth and can be used for transmitting speech.  For music the Premium quality mode is advisable.

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 8 INTEGRUS Tech ST 03.Mar.06 Carriers and Channels  Up to 8 different carrier signals (depending on the transmitter type) can be transmit. Each carrier can contain up to 4 different audio channels.  The maximum number of channels per carrier is dependent on the chosen quality modes.  Per carrier a mix of channels with different quality modes is possible, as long as the total available bandwidth is not exceeded.

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 9 INTEGRUS Tech ST 03.Mar.06 Carriers and Channels This table lists all possible channel combinations per carrier: Carrier Mono SQ Mono PQ Stereo SQ Stereo PQ

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 10 INTEGRUS Tech ST 03.Mar.06 Carriers and Channels  The data is digitally modulated onto the carriers. The modulation method used is DQPSK (Differential Quadrature Phase Shift Keying) with coherent detection at the receiver.  The information is carried by the phase changes. Carrier Allocation

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 11 INTEGRUS Tech ST 03.Mar.06  All audio sent by the transmitter, is compressed by a sub-band APCM (Adaptive Pulse Code Modulation) encoder.  System Audio Performance Measured from the audio input of an LBB4503 to the headphone output of an LBB4540  Audio frequency response: Standard Quality mode………………...: 20 Hz to 10 kHz (-3 dB) Premium Quality…………….………….: 20 Hz to 20 kHz (-3 dB)  Total harmonic distortion at 1kHz …: < 0.05 %  Crosstalk attenuation at 4 kHz….….: > 80 dB  Dynamic range………………………..: > 80 dB  Weighted signal-to-noise ratio……..: > 80 dB(A) Audio Encoding and Quality I&O Manual

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 12 INTEGRUS Tech ST 03.Mar.06 Transmission Protocol  Protocol and modulation technique : according to IEC part 7  Carrier structure Each carrier contains:  synchronization information  audio slots  data slot(s)  A Reed-Solomon RS coder is applied to protect the audio and data information for transmission errors.

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 13 INTEGRUS Tech ST 03.Mar.06 Transmission Protocol Audio slot A Audio slot B data RS parity SQ Audio slot A Audio slot B data RS parity SQ 1 super frame RS frame 0SYNCRS frame 1RS frame 2RS frame 3RS frame 4RS frame 5  With four Standard Quality channels

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 14 INTEGRUS Tech ST 03.Mar.06 Transmission Protocol Audio slot A Audio slot B data RS parity PQ Audio slot A Audio slot B data RS parity PQ  With two Premium Quality channels 1 super frame RS frame 0SYNCRS frame 1RS frame 2RS frame 3RS frame 4RS frame 5

ST/SEU-CO | | © Robert Bosch GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties. Security Systems 15 INTEGRUS Tech ST 03.Mar.06 System Technology End of section