DIGITAL RADIO GUIDE

TERRESTRIAL TRANSMISSION SYSTEMS - ISDB-TSB

4.3Japan's Digital Radio Broadcasting (ISDB-TSB)

4.3.1Overview

ISDB-TSB (Integrated Services Digital Broadcasting – Terrestrial for Sound Broadcasting) system was developed for terrestrial Digital Sound Broadcasting (DSB) and was included in the ITU-R Recommendation BS.1114-3 in 2004. The system specification was developed by the Association of Radio Industries and Businesses (ARIB) in October 1998. Laboratory experiments and field trials using Tokyo Tower were carried out to verify the system performance in 1999 and the final specification was approved as a Japanese Standard in November 1999.

Two stations were launched in Tokyo and Osaka in the frequency band 188 MHz to 192 MHz in October 2003.

4.3.2The Methods

A terrestrial TV broadcasting frequency band that fits for mobile communications, OFDM (Orthogonal Frequency Division Multiplexing) that withstands interference caused by multiple paths (delayed waves), a modulation method that fits for communications with cell phones and mobile receivers, powerful error correction function, etc., have been adopted to allow good communications with cell phones and mobile receivers.

Concerning information compression technology and multiplexing technology, MPEG-2 has been adopted after diverse compatible communications with digital broadcastings (such as terrestrial digital TV broadcasting, BS digital broadcasting, CS digital broadcasting) were considered. MPEG-2 offers a common base for signal processing, which leads to reduction in the production cost of receivers by using LSI-chip and consolidation of receivers as well as easy exchange of data with other media.

Since this broadcasting system has the common segment structure with terrestrial digital TV broadcasting, the receivers can be consolidated.

(1)Audio encoding system

MPEG-2 AAC (Advanced Audio Coding) and SBR (Spectral Band Replication) have been adopted. However, SBR is optional.

This system satisfies the ITU-R standard, which enables high-quality multiple channeling at a low bit rate of 144 kbps or so. It has been adopted by BS digital broadcasting and terrestrial digital TV broadcasting. The adoption to the DSB resulted from the consideration of cross-media communications.

(2)Restricted reception system MULTI2 system has been adopted.

A scramble system has been adopted for charged broadcasting. It is the MULTI2 system that has already been adopted for terrestrial digital TV broadcasting, BS digital broadcasting, and CS digital broadcasting. The adoption to the DSB resulted

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Grundig manual Japans Digital Radio Broadcasting ISDB-TSB, Overview, Methods, Audio encoding system

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.