4 ms·

Uhm... https://en.wikipedia.org/wiki/Digital_Radio_Mondiale https://en.wikipedia.org/wiki/Digital_Radio_Mondiale ?

aidenn0 4y ago
Both DRM and iBiquity HD-Radio are mentioned on the page.
retrac 4y ago
Maybe longwave can make a come back with digital modulation. There's a ~100 kbit/s broadcast channel available way down there, with uniquely excellent propagation characteristics. (Viewing radio as a wave, at such long wavelengths, when the radio waves encounter buildings, or even mountain ranges, they diffract around them. It's like how most of the energy of a wave on the surface of some water diffracts around a small rock sticking out of the water, rather than being stopped by it.) A single transmitter can cover most of a continent, with indoor and even some ground penetration. Receivers are simple, and can have tiny antennas despite the wavelength. There are even watches that can sync themselves to longwave time signal broadcasts, which are about the only thing on LW currently broadcast in North America.
- thelazydogsback 4y ago
  Got to watch those 100ft full-wave whip antennas when going under the bridge ;)
jcrawfordor 4y ago
This website is targeted at the US/Canadian audience, where HD Radio is used rather than DRM. HD Radio does exist for AM stations, but has failed to catch on even more than it has failed for FM (which is a pretty sad story). In my market, for example, there is only a single AM station with HD that's receivable... and that's probably better than the average. It's a Spanish-language sports station, so it sort of falls into two of the popular AM brackets. In 2020 the FCC went ahead with adoption of "all-digital" AM stations with no analog audio. There are enough advantages to the all-digital arrangement, which is of course much more similar to DAB, that some people think it might breathe a little life back into HD radio - I'm skeptical, but only time will tell. In general AM radio has little popularity in the US outside of news and sportscasting. Foreign language stations are also a bit of an AM holdout since they benefit from the larger catchment area. Now I'm not sure that I agree with the authors criticism of IBOC HD Radio as unproven, it works quite well these days, but it is clear that remarkably few radio receivers on the market have HD radio support... even in expensive hi-fi and home theater receivers. Where HD radio has been fairly successful is in cars, with HD radio being a fairly common but far from universal feature in car head units.
- Aloha 4y ago
  HD Radio uptake is quite variable by market. In some markets it's quite dense, others not do much. Other than slightly worse stereo separation FM Multiplex sounds better, other than the stations running the whole HD channel for one audio stream.

Both DRM and iBiquity HD-Radio are mentioned on the page.

Maybe longwave can make a come back with digital modulation. There's a ~100 kbit/s broadcast channel available way down there, with uniquely excellent propagation characteristics. (Viewing radio as a wave, at such long wavelengths, when the radio waves encounter buildings, or even mountain ranges, they diffract around them. It's like how most of the energy of a wave on the surface of some water diffracts around a small rock sticking out of the water, rather than being stopped by it.) A single transmitter can cover most of a continent, with indoor and even some ground penetration. Receivers are simple, and can have tiny antennas despite the wavelength. There are even watches that can sync themselves to longwave time signal broadcasts, which are about the only thing on LW currently broadcast in North America.

thelazydogsback 4y ago
Got to watch those 100ft full-wave whip antennas when going under the bridge ;)

jcrawfordor 4y ago

This website is targeted at the US/Canadian audience, where HD Radio is used rather than DRM. HD Radio does exist for AM stations, but has failed to catch on even more than it has failed for FM (which is a pretty sad story). In my market, for example, there is only a single AM station with HD that's receivable... and that's probably better than the average. It's a Spanish-language sports station, so it sort of falls into two of the popular AM brackets. In 2020 the FCC went ahead with adoption of "all-digital" AM stations with no analog audio. There are enough advantages to the all-digital arrangement, which is of course much more similar to DAB, that some people think it might breathe a little life back into HD radio - I'm skeptical, but only time will tell. In general AM radio has little popularity in the US outside of news and sportscasting. Foreign language stations are also a bit of an AM holdout since they benefit from the larger catchment area. Now I'm not sure that I agree with the authors criticism of IBOC HD Radio as unproven, it works quite well these days, but it is clear that remarkably few radio receivers on the market have HD radio support... even in expensive hi-fi and home theater receivers. Where HD radio has been fairly successful is in cars, with HD radio being a fairly common but far from universal feature in car head units.

Aloha 4y ago
HD Radio uptake is quite variable by market. In some markets it's quite dense, others not do much. Other than slightly worse stereo separation FM Multiplex sounds better, other than the stations running the whole HD channel for one audio stream.