RFDAB vs. DAB+: Understanding the Key Differences
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This article clarifies the distinctions between DAB (Digital Audio Broadcasting) and DAB+, two prominent digital radio broadcasting standards. We’ll explore their key differences across various parameters, offering a clear understanding of their capabilities.
Introduction:
DAB, or Digital Audio Broadcasting, represents a leap forward from traditional FM radio by utilizing digital signals. This technology enables radio stations to broadcast audio signals digitally, which are then received by DAB-compatible radios. DAB employs the MP2 audio codec, a precursor to the widely-used MP3 format.
DAB+ is an improved version of DAB that uses the HE-AAC v2 (also known as AAC+) audio codec.
Both DAB and DAB+ operate within the VHF Band III, ranging from 174 to 240 MHz. The DAB standards are documented in ETSI EN 300 401, TR 101 496-1/2/3, and TS 102 563.
| Parameters | DAB | DAB+ |
|---|---|---|
| Audio signal encoder | MP2, MPEG audio format | AAC+ |
| Audio quality | Good | Better |
| Number of stations | Less, 38 channels in band 3 | More, typically 9-24 (max 64) |
| Radio/Data | Up to 10 | Up to 24 |
Conclusion:
DAB+ exhibits backward compatibility with DAB. This means a DAB+ receiver can successfully decode and play DAB broadcasts.
However, DAB lacks forward compatibility with DAB+. Consequently, a DAB receiver is unable to process or play DAB+ broadcasts.
