Grundig Digital Radio manual Appendix a The Eureka 147 System System Description, Overview

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DIGITAL RADIO GUIDE

APPENDIX A: EUREKA 147

APPENDIX A The Eureka 147 System - System Description

Overview

The Eureka DAB System has been designed to ensure rugged and reliable reception by listeners using fixed, portable or mobile receivers with non-directional antennas. The system is spectrum and power efficient (equivalent or better than FM radio) and can be operated at any frequency up to 3 GHz for mobile reception and at higher frequencies for fixed reception. It is suitable for use on terrestrial, satellite, hybrid (satellite with complementary terrestrial) and cable networks. It currently uses the following audio compression techniques, MPEG 1 Audio Layer 2 and MPEG 2 Audio Layer 2 and supports a range of audio coding rates. It has a flexible digital multiplex, which can support a range of source and channel coding options. This includes programme associated data (PAD) services and independent data services (IDS).

Eureka 147 is currently the only digital audio system that has met all the requirements of the ITU for a new digital sound broadcasting system. It is designated ‘Digital System A’ and has the status of a world-wide standard (ITU-R Recommendations BS 1114 and BO 1130 for terrestrial and satellite sound broadcasting respectively). It is an open standard, fully specified within the European Telecommunications Standards Institute (ETSI), in ETS 300 401.

The system provides strong error protection in the transmitted signal. The information transmitted is spread in both the frequency and time domains and the effects of channel distortions and fades are eliminated from the recovered signal in the receiver. This is achieved even when the receiver is in a location with severe multipath propagation, whether stationary or mobile.

Efficient utilisation of the spectrum is achieved by interleaving multiple programme signals and by the system’s ability to operate additional transmitters as gap fillers in a single frequency network (SFN). A gap-filling transmitter in this arrangement receives and re-transmits the Eureka 147 signal on the same frequency.

Major System Features

Like almost all digital radio systems, Eureka 147 uses standard audio compression techniques and COFDM. As Eureka 147 was the first standardised digital radio system, the audio compression techniques used in all Eureka 147 implementations are now somewhat dated.

A Eureka 147 transmission has an emission bandwidth of 1.536 MHz, which is capable of providing a range of useful data rates depending on the level of protection. The multiplex contains audio programs; program associated data and, optionally, other data services. Each audio program or data service is independently error protected with a variable coding overhead, the amount of which depends on the requirements of the broadcasters (transmitter coverage and reception quality). A specific part of the multiplex contains information on how the multiplex is configured, so that a receiver can decode the signal correctly, and, possibly, information about the services themselves, the links between different services, and conditional access information for subscription services.

Eureka 147 is a mature system with 29 standards and related documents published by the European Telecommunication Standards Institute (ETSI). The ITU has included details of the Eureka 147 system in its Digital Sound Broadcasting (DSB) Handbook and Recommendations BS.1114 and BO.1130.

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Contents Page Page Foreword Page Table of Contents Appendix C Glossary of Acronyms Introduction What is Digital Radio? Digital Radio Systems Terrestrial in service date Satellite Service dateDRM+ Why Digital Radio? Terrestrial Transmission Systems DRM Digital Radio MondialeBrief Description of the DRM System Overall designDistribution Interface Audio Source Coding DRM Source Encoding and DecodingDRM Source Decoding Channel coding and modulation Transmitter Considerations Over the air4 DRM+ Principal Advantages and Challenges DAB EurekaSystem Development System DescriptionChallenges Canada DAB Development Worldwide asBelgium DenmarkItaly FranceGermany SingaporeSweden South KoreaSpain SwitzerlandUnited Kingdom Infrastructure Requirements Eureka 147 Main System FeaturesMain System Features Synergies with Other SystemsSynergies with Digital Radio Mondiale DRM Synergies with Digital Television Future Developments of DABDAB-Based Multimedia Broadcast Systems DMB T-DMB DAB-IP IP over Enhanced Packet ModeGerman DXB Project DAB as carrier of multichannel audio Enhanced Audio Codec, DAB+Digital Radio Guide Terrestrial Transmission Systems DAB Conceptual diagram of the outer coder and interleaver Types of ReceiversHandheld Receivers In-Home ReceiversIn-Car Receivers PC ReceiversList of manufacturers and their DAB products JVCTeac Methods Japans Digital Radio Broadcasting ISDB-TSBOverview Audio encoding systemTransmission channel encoding system Modulation method Error correction systemMultiplexing System Transmission bandwidthsData Segment Spectra Hierarchical transmission and partial receptionPage Example of connected transmission three TS’s Parameter restrictions in connected transmissionTransmission capacities Information bit rates for the triple-segment transmission*5Characteristics ReceiversReceivers expected Overview of ServicesTrial receivers Multiple voice broadcastingOutlook for the Future Download service experimentBroadcasting of simplified moving images IBiquity HD Radio System HD Radio Standards Activity HD Radio AM and FM ReceiversHD Radio System Technical Design Overview Typical HD Radio Automobile ReceiversStation Information Service SIS Core ServicesMain Program Service MPS Advanced Application Services AASHybrid Waveform Waveforms and SpectraFM Extended Hybrid Waveform FM All Digital Waveform HD Radio Subsystems 12 Hybrid AM HD Radio system spectrum allotment13 Functional Block Diagram of HD Radio System Receiver Systems RF/Transmission SystemSound Quality Features Common to North American Digital Radio SystemsMultipath Resistance Frequency Response Audio Quality RatingsMpeg AAC Infrastructure Requirements Deployment Status LicenseesSpectrum Availability Issues related to Terrestrial SystemsCase Study Allocations in Region 18 RRC-06 planning area DAB DVB-T19 T-DAB coverages in Band Entries Implications of Simulcasting HD Radio IbocCoverage DRM Digital Radio MondialeDigital Radio Guide Terrestrial Transmission Systems Issues WorldSpace ITU-R System D Satellite TransmissionBroad Picture WorldSpace Coverage Map Transmission Footprints WorldSpace Up-link Coverage JVC Sirius Satellite Radio / XM Satellite Radio Sirius Overview Sirius Sdars Delivery System Sirius Constellation RaanSirius Ground Track Continental US Satellites Ground Deployment StatusTT&C RepeatersMobile Broadcasting Corp. and TU Media Corp. ITU-R System E Introduction Internet Radio IRBringing Radio to the Internet Internet Radio peculiarities Internet Radio as a complement to established radio services Streaming technology for radio services Internet-only stations IR Portals and Music PortalsServer-client Distribution networksWiMAX Multicasting P2P networksInternet Radio terminals and playback devices PodcastingInternet Radios relation with the traditional radio Measuring audience Digital Radio Guide Internet Radio 10.1 VRT Case studiesVirgin Radio Summary and Conclusions Swedish Radio multichannel audio distributionLaunch Music on Yahoo Launch.yahoo.com Some Important Radio PortalsBeethoven LiveLast FM IM TuningRadio VH1 MTV RadioSHOUTcast Some Sources for the Digital Radio Guide Etsi Cenelec IEC Digital Radio Guide Sources Appendix a The Eureka 147 System System Description Major System FeaturesOverview III Modes of OperationTable A.1 Eureka 147 Transmission Parameters Data CapacityData Services Number of audio services in a multiplexTable A.2 Example of possible number of programs Spectrum Issues Eureka 147 Channel PlansAudio Quality Planning Parameters ITU DSB HandbookVHF Band Propagation PropertiesBand 1452-1492 MHz Recent system developments Multimedia Object Transport MOTDynamic Label Slide Show Broadcast WebsiteElectronic Programme Guide EPG DAB Virtual Machine DAB Java EtsiConditional Access DAB Receiver InterfacesFile caching in the receiver SBR LayerTopNews IP datacasting in DAB Tpeg transport in DABNumber Title Advanced demodulation technique for CofdmTable A.3 Etsi Standards relating to Eureka Third EditionGSM / Pstn / Isdn / Dect Reference Title Receiver StandardsTable A.4 Receiver Standards for Eureka ITU Publications and RecommendationsBBC DAB Appendix B Relevant World Wide WebsitesNasb 111 Glossary of Acronyms DRM DRBDrdb DRPISDB-TSB IeeeIfpi ITUPDA P2PPAD PNGTMC TDMTdma TmccDisclaimer

Digital Radio specifications

The Grundig Digital Radio represents a significant advancement in radio technology, combining aesthetics, functionality, and a user-friendly interface. As a pioneer in the audio and electronics industry, Grundig has successfully integrated modern digital capabilities into its traditional radio design, appealing to both nostalgic listeners and tech-savvy users.

One of the standout features of the Grundig Digital Radio is its versatility in reception. With DAB+ (Digital Audio Broadcasting) technology, users can enjoy a wide array of radio stations with superior sound quality, free from the hiss and interference commonly associated with analog broadcasts. The inclusion of FM and AM bands ensures that listeners are not limited, providing access to local stations that may not yet have transitioned to digital.

The Grundig Digital Radio is designed with ease of use in mind. Its intuitive interface, often featuring a clear LCD display, allows users to navigate through stations and settings effortlessly. Many models also include a built-in tuner that automatically scans and presets available stations, simplifying the setup process. For those who appreciate personalization, some variants come equipped with customizable presets, allowing users to save their favorite stations for quick access.

Portability is another key characteristic of the Grundig Digital Radio. Many models are lightweight and come with built-in handles, making them ideal for on-the-go listening, whether it's in the garden, on the beach, or during a picnic. Battery options, alongside mains power, ensure that users can take advantage of their radios wherever they choose.

In terms of sound quality, Grundig utilizes advanced audio technologies to deliver rich and clear sound. Enhanced bass responses and treble controls allow users to fine-tune their listening experience to match their preferences. Furthermore, many models feature additional inputs, such as AUX and USB ports, enabling users to connect their smartphones or other devices, expanding their audio options.

Other notable characteristics include built-in alarms and timers, which make the Grundig Digital Radio a versatile companion for daily routines. Some models even support Bluetooth connectivity, allowing for seamless streaming from a variety of devices.

In summary, the Grundig Digital Radio embodies the perfect blend of traditional radio appeal and modern digital technology, offering versatility, ease of use, superior sound quality, and portability to meet the diverse needs of today’s listeners. Its well-thought-out features and user-friendly design make it an excellent choice for anyone looking to enhance their audio experience.
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