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Broadcasters Accuse Telecom Companies of Hoarding Spectrum
angry tapir writes "The National Association of Broadcasters, asked by the US Federal Communications Commission and some lawmakers to give up television spectrum for mobile data uses, has fired back by accusing several other companies of hoarding the spectrum they hold. In recent weeks, the NAB has gone on the offensive by suggesting that several spectrum holders, including Verizon Communications, AT&T and Time Warner Cable, have not developed the spectrum they already have."
There seem to be a lot of parallels to IPv4... our general supply of unallocated spectrum/addresses is running out while everybody is accusing everybody else of hording unused spectrum/addresses and to turn them over for others to use.
And hand the spectrum over to the next generation of 802.11b/g/n-esque applications.
Even confined to a couple of really sucky blocks of spectrum, the success of no-license-to-deploy, inexpensive wireless data standards has been extraordinary. Why not murder a few bloated, feckless, incumbents and hand over some proper spectrum for this proven and extremely useful application?
TV Broadcasters in the U.S. freed up huge swaths of bandwidth in the 700 MHz range during the switchover to digital TV. This frequency range has a lot of very useful attributes, like being able to penetrate buildings and travel large distances - attributes that are ideal for wireless data transmission. Portions of that bandwidth was subsequently auctioned off for about $20 billion, austensibly to permit the development of new wireless services. The auction concluded a few years ago, and yet I haven't heard anything about anyone developing new wireless infrastructure around it. As far as I know, there isn't even a baseband chipset for it yet. What gives?
I don't live in America but a similar thing is happening here in Australia. There is very little broadcast in 1080p here. Most is broadcast either in 1080i, 720p or increasingly, standard def (576i on most channels, 576p on a couple).
I say 'increasingly' standard def because what's happening over here is that most TV networks have looked at the spectrum granted to them and made the decision they'll make more money from broadcasting, say, four or five SD channels in that multiplex, than they would from broadcasting one or two HD channels. So you see networks with half a dozen SD channels playing endless reruns of old stuff, rather than concentrating on one good HD channel with new content.
Which isn't all bad: it does give you a lot more choice when you're flipping channels. But all those people that bought 1080p sets really aren't getting use out of them unless they have it hooked up to a bluray player or HTPC. A few years ago when I was shopping for a TV I was on a limited budget, and consciously bought a high end 720p set rather than a low end 1080p set. Haven't regretted the choice once to be honest.
First, the best quality is arguably 1080i (1920x1080 at 30fps), which is same resolution as 1080p once it is de-interlaced. 720p (1280x720 at 60fps) is better for motion, since it is not interlaced.
Second, the reason that nobody broadcasts 1080p is because there is not enough bandwidth in a single channel. To clarifly the current ATSC standards provide for 19Mb/s and require MPEG2 and limit the codecs they can use, which terrible compression. If broadcasters could use a modern codec (H.264, VP8, etc), then they could probably squeeze 1080p out of a single channel. But then you'd need to buy new digital tuners to get the h.264 encoded TV.
Third, broadcasters's greed is their own worst enemy when it comes to signal quality. In my area, many stations have as many as 2 SD sub channels (and our ABC has 2 HD channels, and one SD channel). Some are also carrying mobile DTV. These subchannels are usually re-runs of crappy old TV/Movies, music videos, shopping channels, and other junk like you'd see on basic cable. They limit the bandwidth for the main HD channel to 12Mb/s or less. I've recently put up a bigger antenna so I can pull in channels from a market 50 miles away, simply because the broadcasters there use less subchannels, and have far better quality.