<strong>DCN</strong> Data Brochure | Introduction |31. Introduction1.1 Digital Congress NetworkWorld’s first digital congress systemThe Bosch Digital Congress Network (<strong>DCN</strong>) brings thebenefits of innovative digital technology to discussion,conference and congress systems. Digital signal processingand transmission via a simple network system notonly offers great improvements in audio quality, butsimplifies operation and installation. The <strong>DCN</strong> controlsystem has the option of modern, user-friendly softwareto setup and control conferences, although it is just aseasy to run an operator-free configuration.<strong>DCN</strong> provides flexible management facilities for alltypes of conferences, from small, informal gatherings tointernational, multi-lingual congresses with thousandsof delegates. It is the first entirely digital system of itskind, and offers versatility, high audio quality datatransmission security while providing complete controlover conference proceedings.Digital performance with user-friendly software controlEvery requirement of modern conference managementis met. There are facilities from basic microphone management,through delegate identification and registration,electronic voting, information distribution anddisplay, up to extensive simultaneous interpretation.The <strong>DCN</strong> is above all a user-friendly system. A singleoperator can, with the help of the appropriate softwaremodules, control and monitor even the largest of congresses.Modular system approachBy simply daisy-chaining the modular <strong>DCN</strong> units, anyconfiguration can be put together. Although the diagramon the right shows a simple discussion system, themodular structure of the <strong>DCN</strong> system means all levelsof conference can be catered for without any difficulty.Systems can be expanded by adding more contributionequipment and introducing PC control with softwaremodules.
4| Introduction | <strong>DCN</strong> Data BrochureComplete range of equipmentThe full range of <strong>DCN</strong> products includes contributionunits, central control units, simultaneous interpretationand language distribution equipment, applicationspecificsoftware modules, information display systemsand installation equipment. This is complemented byexternal equipment such as video and dot matrix displays,PCs, monitors, booster amplifiers, loudspeakersand printers, all of which are fully compatible and easilyintegrated into the <strong>DCN</strong> system.Praedic<strong>DCN</strong> DiscussionDelegate/chairman/Interpreter(contribution & distribution)DACACN 1ACN 3Channel select unit(language distribution)PC-busACN 1LBB 3510/00Network cardPraedicACN 1ACN 3Delegate/chairman unit (Concentus)e.g. Hall DisplayPraedicDACACN 1 - up/downACN 2 - up/downACN 3 - down onlyACN 1procLBB 3512Data Distribution BoardACN 1PraedicACN 1ControlPanelPersonalComputerproc.FlashE-PROMRAMDSPCentral Control UnitSimple ‘daisy-chain’ installation characterises the <strong>DCN</strong> system.The ‘building blocks’ of <strong>DCN</strong>Advanced digital technologySignal transmission and processing is handled byproven digital audio technology. An example of thisis the high-performance ‘Bitstream’ system used foranalogue-to-digital conversion in delegate microphoneunits. This technology is integrated into custom singlechipanalogue-to-digital and digital-to-analogue convertersaround which most <strong>DCN</strong> units are based. OtherICs specially developed for this application includededicated protocol converter chips. The systemcombines the highest levels of functionality andperformance in an extremely compact design.The diagram above shows how the ‘building blocks’of the <strong>DCN</strong> fit together. The Audio CommunicationNetwork (ACN) family of protocol converter chips aresimply connected to the network cabling carrying thedigital signal. In addition to bi-directional protocolconverters for contribution equipment and centralcontrol units, there is also a uni-directional ACN chipfor channel selection units for distribution only.The Praedics (Professional Audio Encoder DecoderIntegrated Circuits) are combined analogue-to-digitaland digital-to-analogue converters. These devicesconvert the digital signal from the <strong>DCN</strong> to audio, andconvert the contributor’s audio signal to digital, readyfor protocol conversion by the ACN chip.Excellent audio qualityThe result of this advanced digital technology is excellentaudio performance with no loss in signal quality orlevel during transmission. Subsequently, each delegatereceives an audio signal of consistently high quality,which makes a significant contribution to speech intelligibility.<strong>DCN</strong> virtually eliminates problems associatedwith conventional systems, such as background noise,interference, distortion and crosstalk.Reduced installation costsFast, cost-saving installation is an important benefit of<strong>DCN</strong> digital technology. A thin, flexible, twin-coaxialcable carries all the system’s digital signals, thereforeeliminating the need for costly and vulnerable multicorecables used in conventional analogue installations.This twin-coaxial cable can easily be run through existingducting and cable conduits. It can simultaneouslycarry up to 16 high-quality contribution channels,16 high-quality distribution channels - typically interpretationlanguages - plus 10 channels for messages andother data.