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December 29, 2008

Comments

Greg

"Now on HD Radio: Subscriptions, Pay Per Hear, and More"

"A new 'conditional broadcasting' feature for HD Radio called RadioGuard, from NDS, will allow owners of compatible HD radios to pay for premium content via a subscription, a one-time charge, or as part of a sponsored deal... They're primarily looking at home and car use right now because it's hard to design a device like this to consume so little power that it can be carried away from a power source."

http://blog.wired.com/music/2007/04/now_on_hd_radio.html

BTW - HD Radio may not be free for long, and who in their right-mind would pay for these clever reworks of the main analog channels.

Greg

"I got an HD radio for Christmas"

1. Not used to a radio taking 5-7 seconds to 'boot' when you turn it on.
2. HD2/HD3 channels take 5+ seconds to 'Link' whenever you change channels. Doesn't really encourage channel surfing.
3. The radio runs very hot; I've heard those Ibiquity chips suck power and that's why you're not seeing a walkman HD radio yet. (And that's also why you'll probably never see HD radio in a cell phone).
4. In Bernal Heights (where I live), I can only pick up 15 HD2 channels.
5. Public radio, such as KQED, KCSM, KALW all have no HD2.
6. I'm not really impressed with any of the current HD2 formats here in San Francisco. There is a lot of hiphop, but don't you think most of the audience for that's going to just be downloading MP3 'mixtapes' to their iPods?
7. I'm not impressed with the HD2 audio quality; and when more stations add a HD3 that means the main channel will sound the same as the HD2/3 channels - 32kb streams. They sound good for 32kb but there are some strange artifacts that crop up from time to time.

http://tinyurl.com/9jzukw

Your experience certainly is not typical....hmmmmmm

JimBo

Why is the car industry so far behind in offering HD Radio? I've looked at a couple of new cars recently -- a Toyota Tacoma pickup, and the Nissan GT-R supercar -- and both have 6 CD changers, one (the Nissan) has an ipod link and an internal drive that can store several hundred songs -- but neither come with an option to get an HD radio in the vehicle? Don't know about the domestics, but didn't those forward-looking Japanese companies see HD radio coming? Don't really want to shell out the bucks their charging for their radios and have them obsolete when you get your tags!

Mark Roberts

A group of somewhat disparate thoughts follows.

Sound quality is more than channel bitrate, though bitrate certainly puts a ceiling on the quality that is available. Processing is important, too. Since you (Greg) are in San Francisco, listen to KFOG's HD-2 channel to hear how it should NOT be done. (Actually, listen to any audio from KFOG, be it analog or digital, to hear how it should NOT be processed.) Densely modulated audio with low dynamic range, typical of most FM stations, will get torn up by the compression algorithm, which expects quiet passages to be able to compress and discard bits effectively. When it doesn't get those passages, you get instead what some people call the "swirling toilet bowl" effect. Broadcasters are just learning how to process for digital signals, and they have some very bad habits to unlearn.

(@Greg: If you want to hear it done right, try KCSM-FM out of San Mateo. The digital signal sounds better than the analog signal because the digital channel's processing doesn't have to account for the crude form of noise reduction present on every analog FM signal.)

Satellite radio does better in this regard, though the quality there can be lacking, too.

It's also my experience that individual sensitivity to digital artifacts varies a LOT. Some people can hear it even with a 160 kbps bit rate; others can listen to 64 kbps undisturbed. You mileage will vary.

As for radios - I'll be persuaded that HD has a future when it comes on a chip that can run off batteries. We're nowhere near that point yet. Radio at best is an accessory now. Few other than radio geeks buy a radio for the sake of buying a radio. It had better be convenient and not require too much trouble. Especially in the home, HD is still kind of fussy.

As for programming - It'll have to be more than a computer in a corner being reprogrammed occasionally. I've heard some HD-2 channels with dead air for up to half a day at a time. This is in major-market San Francisco. If HD is to mean anything, it will have to offer programming people will listen to. The KXTR simulcast that Aaron refers to is probably one of the better uses of an HD side channel, though it's amazed me that KXTR has hung on in some form for even this long. Even in my days in KC, it seemed as though KXTR was run on a shoestring, noble though the attempt was.

@Greg - back to running hot: the Sony tuner has been considered notorious for this. I have a Sangean HDT-1X, which gets warm but not hot to the touch. I don't believe the Sangean will pick up HD-3 channels, though.

The Sangean (and the Sony) are interesting FM tuners from another perspective, being among the first consumer FM tuners to use digital signal processing to get the kind of reception, even on analog signals, that you used to have to buy a $5000 tuner to get.

Dale

HD on AM is a greater improvement in sound than HD on FM IMHO. Listening to St. Louis KMOX at dusk in HD sounds better than any AM station in Kansas City except 1190AM which is HD.

[I totally agree--kinda pitiful that only Radio Disney invests in HD on the AM band--on the other hand, Entercom is right to kick KXTR over to FM for its HD which is qualitatively better than AM HD.--AB]

Susan

So what's 99.7 playing on HD now that they turned into "Kiss FM" ?

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