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#1
Why HD radio is a joke and analog FM broadcasts will stay:

The TL;DR answer is: bandwidth.

Now for the mathematical physics explanation. Warning: simplified science content and simple maths ahead.

The FM broadcast band has only 100 khz per station of bandwidth.

The Nyquist Sample rate requires that in order to achieve an error free symbol rate, double the bandwidth of the symbol rate is needed.

So if the symbol rate is 54 kbps, then 108 khz of bandwidth is needed.

108 khz of bandwidth has exceeded the 100 khz of FM station bandwidth.

So if the symbol rate is 1411 kbps for uncompressed audio, then 2.822 MHZ of bandwidth is needed.

2.822 MHZ of bandwidth has exceeded the 100 khz of FM station bandwidth.

HD radio thus has to make due with less, and uses Windows Media Audio instead of MP3, which WMA has even higher compression than WMA. WMA stereo has only 8kbps.

Thus, 8kbps WMA fits in a 15 khz each side band double side band suppressed carrier FM broadcast sub channel above the stereo signal.

DSL solved the problem by simply adding more bandwidth, so a 54 kbps signal that needs 108 khz of bandwidth if it had 10.8 MHZ of band width it could have a bit rate of 5.4 Mbps.

Unfortunately, the FM band can not just give each station 2.822 MHZ of bandwidth for CD quality, because then there could only be about 5 stations in the approximately 20 MHZ of bandwidth that the FM band covers.

Even giving it MP3 quality would be unacceptable bandwidth.

The analog-to-digital transition worked for TV, but that's because you could never see reference quality to begin with in the first place when it was analog because it used too much bandwidth that could not travel far enough, and so with compression codecs to reduce the bandwidth so the signal will travel farther the TV signal will appear to be a much better quality than you are used to for analog TV, but vastly inferior to the quality of a DVD or bluRay, maybee the same as a YouTube video or NetFlix.


Why would anyone want to listen to an 8kbps WMA broadcast when they can listen to a 320kbps MP3 on their iPods, or listen to the analog signal which is higher quality than the digital signal if you are close to the station?


Conclusion: FM radio isn't going to go all digital any time soon, if ever, at least that is until someone figures out how to compress CD quality into 8kbps.

Either that or expand the FM band to include the low VHF analog television band and the high bandwidth needed to stream uncompressed audio could be fullfilled by the band width of a TV channel the new FM band would be full digital and the old FM band would stay analog to allow for more stations, and the new FM band could be digital simulcasts of existing analog FM stations only for the most popular stations in the area since there would be a limit of 6 digital CD quality FM stations. 320 kbps MP3 compression would more likely be used and it would allow for 4 stations in each TV channel for a total of 24 digital 320 kbps Mp3 FM stations. 160 kbps Mp3 could also be used at a compromise for quality, and that would put the new FM band at the same number of stations as the old FM band which is 50 stations.

but given a choice of streaming 160 kbps from the radio or 320 kbps from a 4G smart phone, which would you prefer?

Thus, by the time the new FM band existed in maybee 20 years from today in 2033, 4G smart phones would probably already be able to stream uncompressed audio and make a 160kbps radio broadcast stream look like a dinosaour.

Conclusion: The whole new FM band in digital on the old low VHF TV band thing isn't going to happen because of the internet.


TL;DR: bandwidth is why.
#2
But what if there were aliens.
[img]http://i.imgur.com/LYZyCdp.gif[/img]


Quote by CrossBack7
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#3
cool.


too bad radio is shit these days. to the satellite we gooooo!
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#4
i had a radio once

it did anal




#6
Quote by dietermoreno

Thus, 8kbps WMA fits in a 15 khz each side band double side band suppressed carrier FM broadcast sub channel above the stereo signal.

Gibberish
#7
+1 to hellraiser radio is pretty shit nowadays so I just make several youtube playlists
You hit 'em and they get back up
I hit 'em and they stay down
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#12
Quote by dietermoreno
HD radio thus has to make due with less, and uses Windows Media Audio instead of MP3, which WMA has even higher compression than WMA. WMA stereo has only 8kbps.
lol
#13
I got tired of the radio stations in my area (not enough variety, same bland Top 40) and bought an AC/DC tape on Amazon to listen to in my girlfirend's car.

We are pretty happy, now.

Quality of music > quality of sound
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#14
Who listens to radio these days? That's why cars have CD players
Tomorrow will take us away
Far from home
No one will ever know our names
But the bards' songs will remain
Tomorrow will take it away
The fear of today
It will be gone
Due to our magic songs

ALL HAIL CELESTIA
#15
I actually understand everything you said.

Clearly no one else does.

The correct number of basses is one more than the number you already own.
Last edited by Silver Blues at Aug 10, 2013,
#17
Quote by StewieSwan
2013

Radio

I listen to lots of Radio because it's the best way to keep up to date with stuff. People hate on radio for no good reason
#19
Who the hell would care enough about how great their radio sounds anyway?
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#21
Literally none of this matters to anyone for any reason.

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#22
If you're passionate about quality you wouldn't be listening to the radio so the whole argument is pointless.
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#23
Quote by jjfeu662
Who listens to radio these days? That's why cars have CD players
My car has SD card slots in the stereo that plays lossless files.

Therefore your argument is invalid. Somehow.
#24
Quote by americablanco
I got tired of the radio stations in my area (not enough variety, same bland Top 40) and bought an AC/DC tape on Amazon to listen to in my girlfirend's car.

We are pretty happy, now.

Quality of music > quality of sound

lol I would rather go deaf than have to listen to AC/DC on a car ride
Last edited by darkcheef at Aug 10, 2013,
#26
I guess TS didn't get the memo.

Since I feel like being nice, here's my copy.

Dear UG user,

Due to an oversight, we forgot to mention this important piece of news in our previous letter to you. Please pass on the same to as many fellow users as possible.

"No one gives a shit. "


Cordially yours,

UG Team
#27
^
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#28
Quote by darkcheef
lol I would rather go deaf than have to listen to AC/DC on a car ride


Agreed.

Unpopular opinion warning: AC/DC are bland as fawwkkk.

As for what I listen to on the Radio? I like listening to comedy shows like Listen Against, and Radio 6 actually plays a decent mix of music.
"I remember when my parents told my brother he was adopted. I was a little confused myself, but it did explain why he's black."
#29
Quote by willT08
I listen to lots of Radio because it's the best way to keep up to date with stuff. People hate on radio for no good reason



The only people that care about 'keeping up to date' with music are sellouts.
Check out my band Disturbed
#30
Quote by sca.smith
Unpopular opinion warning: AC/DC are bland as fawwkkk.

tbh i don't think anyone here is gonna disagree with you




#31
Quote by hriday_hazarika
I guess TS didn't get the memo.

Since I feel like being nice, here's my copy. Dear UG user,

Due to an oversight, we forgot to mention this important piece of news in our previous letter to you. Please pass on the same to as many fellow users as possible.

"No one gives a shit. "


Cordially yours,

UG Team




totally stealing this and making it my auto-reply when people send me hate mail.


also, the future is internet radio powered by a national wifi network.
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#33
Radio is so 1910
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#36
Quote by StewieSwan
The only people that care about 'keeping up to date' with music are sellouts.

What?

How am I supposed to know what big tunes are forthcoming if I don't listen to Youngsta on Rinse and beg ID's?
#37
what the hell is a "radio"? is that like some corporate controlled MP3 player or something?
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#38
Quote by sca.smith
Agreed.

Unpopular opinion warning: AC/DC are bland as fawwkkk.

As for what I listen to on the Radio? I like listening to comedy shows like Listen Against, and Radio 6 actually plays a decent mix of music.


Well what do you expect when all their songs are 3 chords.
Quote by progdude93
my fetish is dudes with dicks small enough to pee on their own sacks.
#39
Quote by StewieSwan
The only people that care about 'keeping up to date' with music are sellouts.

Are you turning into a hipster, Stewie?
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