DIGITAL RADIO GUIDE

TERRESTRIAL TRANSMISSION SYSTEMS - HD RADIO

The flow of service content through the HD Radio broadcast system is as follows:

Service content enters the HD Radio broadcast system via Service Interfaces;

Content is assembled for transport using a specific protocol;

It is routed over logical channels via the Channel Multiplex; and

It is waveform modulated via the Waveform/Transmission System for over-the-air transmission.

The system employs coding to reduce the sampled audio signal bit rate and baseband signal processing to increase the robustness of the signal in the transmission channel. This allows a high quality audio signal plus ancillary data to be transmitted in adjacent frequency partitions and at low levels that do not interfere with the existing analog signals.

4.4.4Core Services

(1)Main Program Service (MPS)

The Main Program Service (MPS) is a direct extension of traditional analog radio. MPS allows the transmission of existing analog radio-programming in both analog and digital formats. This allows for a smooth transition from analog to digital radio. Radio receivers that are not HD Radio enabled can continue to receive the traditional analog radio signal, while HD Radio receivers can receive both digital and analog signals via the same frequency band. In addition to digital audio, MPS includes digital data related to the audio programming. This is also referred to as Program Associated Data (PAD).

(2)Station Information Service (SIS)

The Station Information Service (SIS) provides the necessary radio station control and identification information, such as station call sign identification, time and location reference information. SIS can be considered a built-in service that is readily available on all HD Radio stations. SIS is a required HD Radio service and is provided dedicated bandwidth.

(3)Advanced Application Services (AAS)

Advanced Application Services (AAS) is a complete framework in which new applications may be built. In addition to allowing multiple data applications to share the Waveform/ Transmission medium, AAS provides a common transport mechanism as well as a unified Application Programming Interface (API). On the transmission side, broadcasters utilize the common AAS interface to insert service(s) into their signal; receiver manufacturers utilize the AAS ‘toolkit’ to efficiently access these new services for the end-user. AAS includes separate audio programming such as reading services and other secondary aural and data services.

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Grundig Digital Radio manual Core Services, Main Program Service MPS, Station Information Service SIS

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.