Radio has been one of the most popular forms of broadcasting audio content for many decades. However, with the advancement of technology, traditional FM and AM radio has been evolving towards a digital format that promises a better sound quality and a more efficient coverageThis new format is known as DAB and DAB+ radio.
But what exactly is DAB+ radio, how does it differ from FM radio and how is its implementation evolving in Spain and the rest of the world? In this article we explain in detail how it works, the advantages and disadvantages of DAB+ radio. and advantages and the future of this technology.
What is DAB radio and DAB+ radio?
La DAB radio (Digital Audio Broadcasting) is a digital transmission system that was created to replace traditional analog radio, allowing the broadcast of several stations at the same frequency and improving the sound quality. DAB+ is an evolution of this standard, using a better audio compression to increase the efficiency of the radio spectrum.
The DAB standard is based on the digital transmission of radio signals through multiplexing, which means that multiple signals can be transmitted in the same frequency band. multiple stations without interference. DAB+ further enhances this system thanks to a most modern audio codec, MPEG-4 HE AAC V2, which allows to offer a CD quality sound with a less data.
Differences between DAB and FM radio
To better understand the evolution of digital radio, it is useful to compare DAB with FM, which has been the predominant technology for decades:
- Sound quality: DAB+ radio offers crystal-clear digital sound, free from interference and distortion, while FM can be affected by noises y static.
- Largest number of stations: On the same frequency, DAB can host multiple stations, while in FM each frequency can only be used for a single station.
- Additional Information: DAB stations may include Metadata as text with information about the song playing, name of the station or news in real time.
- Less interference: Unlike FM, where signals can overlap and cause noise, DAB digital broadcasting is more stable.
How DAB+ radio works
DAB+ radio is based on digital packet data transmission in a single frequency networkThis means that all stations can share the same frequency without interference, something impossible in AM or FM.
Each station uses a portion of the available bandwidth within the transmission multiple, allowing it to transmit several stations in parallel. Also DAB+ receivers can be tuned by name instead of frequency, making it easier to search for stations.
How is DAB radio implemented in Spain?
The implementation of DAB radio in Spain has been slow compared to other European countries. Test emissions have been carried out since 1998, but until a few years ago the Coverage has been limited and with few incentives for its expansion.
Currently, plans are being reactivated to expand DAB+ in the Spanish territory. In 2023, the deployment of new issuing centres in several cities, with the intention of extending the coverage to more than 95% of the population in the coming years.
Advantages of DAB+ radio over FM
The advantages of digital radio go beyond sound quality. Its widespread adoption could bring benefits such as:
- Lower energy consumption: DAB+ technology is more Management at an energy level compared to FM.
- More stations available: Allows to broadcast more radio stations without the need for new infrastructure.
- Better coverage in urban areas: Reduces the problems of interferences of FM signals in cities with high electromagnetic pollution.
- Greater resistance to interference: Thanks to its digital design, the reception is more stable.
DAB+ radio compatible devices
Although FM radio is still the dominant feature on many devices, more and more devices are now including DAB+ compatibility. These include:
- Car radios: All new cars in the European Union must include DAB+ tuner standard.
- Portable and home radios: There are DAB+ compatible digital radios available on the market.
- Hi-Fi sound equipment: Some brands offer audio systems with integrated DAB+ radio.
DAB and DAB+ digital radio represent the future of broadcasting, offering advantages that surpass traditional FM. Although its implementation in Spain has been slow, the global trend points to a gradual transition towards this standard, especially in the automotive sector and in countries that have already established national coverage. With better sound quality and more choice for listeners, digital radio is set to become the new standard for audio broadcasting in the coming years.