DIGITAL RADIO GUIDE

TERRESTRIAL TRANSMISSION SYSTEMS - DAB

(3)Synergies with Digital Television

Although the DVB systems (e.g., DVB-S, DVB-C and DVB-T) were primarily designed for television broadcasting, they can and do provide radio (audio-only) programs. DVB-T is a proven technology for digital television and has been implemented in many countries. As DAB, DVB-T is, technically speaking, sufficiently flexible to allow for delivery to portable and mobile receivers. Challenges with implementing DVB-T for digital radio centre on the need for good mobile and portable reception and its large bandwidth usage. DVB-T is not optimised for mobile reception and no mobile or portable hand held receivers are as yet available. The high data rates and wide bandwidth needed to operate the system not only increases power consumption but also makes the design of battery-powered devices difficult. The large bandwidth use required for DVB-T means that many services must be multiplexed together for efficient use of the spectrum and there is a risk that such multiplexes may not be fully utilised, thereby leading to inefficient spectrum use.

Experience suggests that DVB-T platforms designed primarily for digital television are increasingly likely to carry audio-only entertainment and information as well. Most current implementations of DVB-T services for digital television target fixed reception. Consumer-grade mobile DVB-T receivers are likely to be produced with the aim of providing mobile television and multimedia services.

From the technical perspective, DAB and DVB-T are both using the same modulations: OFDM. Therefore it will not be surprising to see common DAB/DVB-T chips developing rapidly. Frontier Silicon announced that they are planning to develop a single chip DVB-T and DAB decoder termed "Logie," for which they have already signed a number of customers.

4.2.6Future Developments of DAB

The technical developments of the DAB system go into two directions:

associate audio services with flexible multimedia services including moving pictures

multi-channel audio

enhanced audio codec, DAB+

(1)DAB-Based Multimedia Broadcast Systems (DMB) T-DMB

Digital Multimedia Broadcasting (DMB) uses an MPEG-2 TS with additional error protection (Reed-Solomon (188,204) code and interleaving as specified for DVB services) transmitted in a DAB Stream Mode sub-channel. Bosch originally proposed the use of MPEG-2 TS to carry one video service in a DAB Ensemble. Subsequently there were proposals by Bosch and the collaborative project MINT (funded by German BMBF) to use MPEG-4 video coding to fit several video services in a DAB Ensemble. Later there was further development and promotion of T-DMB in Korea, and a parallel development of the S-DMB system for satellite BTH. T-DMB specifications were approved by WorldDAB (December 2004) and were standardized at ETSI (June 2005).

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Grundig Digital Radio manual Future Developments of DAB, Synergies with Digital Television

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.