How does HD Radio work?

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How does HD Radio work?

In: Technology
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HD radio uses radio frequencies just above and below analog signals to retransmit the audio radio signal in a digital format, while maintaining the analog signal for original radios.

Because the digital signal is transmitted as binary data (on or off), there is less distortion compared to analog signals, which rely on the waveform of the broadcast.

For people with an HD Radio, it means they can listen to the exact same broadcast with less static, crackling, and distortion.

This is essentially the same as how OTA TV works now (which is digital HD. Analog died in 2009). It’s a lot easier for a reciever to interpret binary data (on/off, think morse code) than radiowaves meant to represent actually sound waves. Plus a lot more data can be packed in. So no only do you get a clearer sound that isn’t subject to interference from space and such, but you can actually recreate more accurate soundwaves for higher fidelity And pack in metadata like artist, title, and even album art.