Grundig Digital Radio manual Mobile Broadcasting Corp. and TU Media Corp. ITU-R System E

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DIGITAL RADIO GUIDE

SATELLITE TRANSMISSION - MOBILE BC / TU MEDIA

5.3Mobile Broadcasting Corp. and TU Media Corp. – ITU-R System E

Mobile Broadcasting Corporation is a commercial organisation based in Tokyo, Japan and TU Media Corporation is a commercial organization based in Seoul, Korea. Although they have one geostationary satellite in common, each of them can use its own transponders and is independently providing high quality digital audio, medium quality digital video and multimedia data services to vehicular, portable and fixed receivers using the satellite and a number of terrestrial repeaters. The same frequency band, 2630 - 2655 MHz, is used by sharing polarization. The service area of Mobile Broadcasting Corp. is Japan and the service area of TU Media Corp. is Korea. Broadcasting signal can be received by receivers with small antennas. To generate enough EIRP for mobile reception, the satellite is equipped with a large transmitting antenna and high power amplifiers. After the launch of the satellite in March 2004, the commercial service in Japan was started in October 2004, currently including 30 audio channels, 8 video channels and about 60 items of multimedia data services. The commercial service in Korea will be started in May 2005, including 22 audio channels and 12 video channels.

The major issue related to signal propagation in BSS (sound) is signal loss due to blockages on the signal path from the satellite to the receiver. Two techniques are used to overcome this issue. One of them is bit-wise interleaving, which is used to overcome the instantaneous signal loss caused by blockages, such as bridges over highways, in vehicular reception environment. Invalid data generated due to the signal loss are distributed over several seconds through the deinterleaver and corrected through the decoder of forward error correction code in the receiver. The period of the signal loss which can be recovered by this technique is approximately a second. The other method is introducing terrestrial repeaters. The terrestrial repeaters retransmit the satellite signal and are expected to cover the area where signal loss occurs due to blockages, for example, buildings and large constructions. In the circumstances, where terrestrial repeaters exist, multipath fading appears at the receiver because more than two broadcasting signals are received at the same time. The CDM (Code Division Multiplexing) and RAKE combining technique is adopted, so that the same frequency band is used for the satellite and the terrestrial repeaters.

The system was approved by ITU in July 2000 as ”Digital System E’ in Recommendation ITU-R BO.1130, System description and selection for digital satellite broadcasting to portable, vehicular and fixed receivers in the bands allocated to BSS (sound) in the frequency range 1400 – 2700 MHz.”

5.3.1Receiver Systems

The services are provided to persons, to mobile vehicles (automobiles, trucks, boats and airplanes) and to homes. There are several types of receivers for this market at the moment; palmtop receiver, PC card receiver, plug-and-play receiver and mobile phone type receiver. Palmtop receiver is a dedicated receiver with 3.5-inch LCD, which is small and light enough to be carried to any place. PC card receiver is used with a notebook computer and you can enjoy video services on the display and audio services through the speakers while you are using the computer. Plug-and-play receiver is used with cradles, which are installed in car and at home, so that you can use the receiver not only in car but also at home without buying extra receiver. Mobile phone type receiver is embedded in a mobile phone and you can receive video or audio services at anyplace without bringing additional equipment, though the display is rather smaller than that of dedicated palmtop receiver.

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Contents Page Page Foreword Page Table of Contents Appendix C Glossary of Acronyms Introduction What is Digital Radio? Terrestrial in service date Satellite Service date Digital Radio SystemsDRM+ Why Digital Radio? DRM Digital Radio Mondiale Terrestrial Transmission SystemsOverall design Brief Description of the DRM SystemDistribution Interface DRM Source Encoding and Decoding Audio Source CodingDRM Source Decoding Channel coding and modulation Over the air Transmitter Considerations4 DRM+ System Description DAB EurekaSystem Development Principal Advantages and ChallengesChallenges Denmark DAB Development Worldwide asBelgium CanadaSingapore FranceGermany ItalySwitzerland South KoreaSpain SwedenUnited Kingdom Synergies with Other Systems Eureka 147 Main System FeaturesMain System Features Infrastructure RequirementsSynergies with Digital Radio Mondiale DRM Future Developments of DAB Synergies with Digital TelevisionDAB-Based Multimedia Broadcast Systems DMB T-DMB IP over Enhanced Packet Mode DAB-IPGerman DXB Project Enhanced Audio Codec, DAB+ DAB as carrier of multichannel audioDigital Radio Guide Terrestrial Transmission Systems DAB Types of Receivers Conceptual diagram of the outer coder and interleaverPC Receivers In-Home ReceiversIn-Car Receivers Handheld ReceiversJVC List of manufacturers and their DAB productsTeac Audio encoding system Japans Digital Radio Broadcasting ISDB-TSBOverview MethodsTransmission bandwidths Error correction systemMultiplexing System Transmission channel encoding system Modulation methodHierarchical transmission and partial reception Data Segment SpectraPage Parameter restrictions in connected transmission Example of connected transmission three TS’sInformation bit rates for the triple-segment transmission*5 Transmission capacitiesReceivers CharacteristicsMultiple voice broadcasting Overview of ServicesTrial receivers Receivers expectedDownload service experiment Outlook for the FutureBroadcasting of simplified moving images IBiquity HD Radio System HD Radio AM and FM Receivers HD Radio Standards ActivityTypical HD Radio Automobile Receivers HD Radio System Technical Design OverviewAdvanced Application Services AAS Core ServicesMain Program Service MPS Station Information Service SISWaveforms and Spectra Hybrid WaveformFM Extended Hybrid Waveform FM All Digital Waveform 12 Hybrid AM HD Radio system spectrum allotment HD Radio Subsystems13 Functional Block Diagram of HD Radio System RF/Transmission System Receiver SystemsFeatures Common to North American Digital Radio Systems Sound QualityMultipath Resistance Audio Quality Ratings Frequency ResponseMpeg AAC Infrastructure Requirements Licensees Deployment StatusIssues related to Terrestrial Systems Spectrum AvailabilityCase Study Allocations in Region DAB DVB-T 18 RRC-06 planning area19 T-DAB coverages in Band Entries HD Radio Iboc Implications of SimulcastingDRM Digital Radio Mondiale CoverageDigital Radio Guide Terrestrial Transmission Systems Issues Satellite Transmission WorldSpace ITU-R System DBroad Picture WorldSpace Coverage Map Transmission Footprints WorldSpace Up-link Coverage JVC Sirius Satellite Radio / XM Satellite Radio Sirius Overview Sirius Sdars Delivery System Raan Sirius ConstellationSirius Ground Track Repeaters Deployment StatusTT&C Continental US Satellites GroundMobile Broadcasting Corp. and TU Media Corp. ITU-R System E Internet Radio IR IntroductionBringing Radio to the Internet Internet Radio peculiarities Internet Radio as a complement to established radio services Internet-only stations IR Portals and Music Portals Streaming technology for radio servicesDistribution networks Server-clientP2P networks WiMAX MulticastingPodcasting Internet Radio terminals and playback devicesInternet Radios relation with the traditional radio Measuring audience Digital Radio Guide Internet Radio Case studies 10.1 VRTVirgin Radio Swedish Radio multichannel audio distribution Summary and ConclusionsLive Some Important Radio PortalsBeethoven Launch Music on Yahoo Launch.yahoo.comMTV Radio IM TuningRadio VH1 Last FMSHOUTcast Some Sources for the Digital Radio Guide Etsi Cenelec IEC Digital Radio Guide Sources Major System Features Appendix a The Eureka 147 System System DescriptionOverview Data Capacity Modes of OperationTable A.1 Eureka 147 Transmission Parameters IIINumber of audio services in a multiplex Data ServicesSpectrum Issues Eureka 147 Channel Plans Table A.2 Example of possible number of programsAudio Quality ITU DSB Handbook Planning ParametersPropagation Properties VHF BandBand 1452-1492 MHz Multimedia Object Transport MOT Recent system developmentsDynamic Label Broadcast Website Slide ShowElectronic Programme Guide EPG Etsi DAB Virtual Machine DAB JavaDAB Receiver Interfaces Conditional AccessSBR Layer File caching in the receiverTopNews Tpeg transport in DAB IP datacasting in DABThird Edition Advanced demodulation technique for CofdmTable A.3 Etsi Standards relating to Eureka Number TitleGSM / Pstn / Isdn / Dect ITU Publications and Recommendations Receiver StandardsTable A.4 Receiver Standards for Eureka Reference TitleAppendix B Relevant World Wide Websites BBC DABNasb 111 Glossary of Acronyms DRP DRBDrdb DRMITU IeeeIfpi ISDB-TSBPNG P2PPAD PDATmcc TDMTdma TMCDisclaimer

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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