The Internet's Clearly Not Ready to Stream Big TV Events
wired.com
wired.com
The current streaming services don't seem to be very competitive comparatively, with a basketball/hockey streams charging $150 per year each alone for what could be a low quality, spotty service.
I hope streaming drastically improves in the near future. It's pretty frustrating to want a relatively small set of programming and yet be forced to pay for tens of channels you'll never look at through basic cable + add on premium packages.
With that being said, I did see something recently about cable changing here in Canada soon to cap basic cable at $25 per month and other channels have to be available separately and not in packages, which could make streaming even less competitive.
OTA broadcast is also best described as multicast.
Satellite -- I don't have the fine details of how this works, but I think it's basically multicast streams your receiver is tuning into.
The fact is that internet streaming is much more convenient for users, but each user puts a measurable load on the system.
edit: I know that they're not literally multicast unless they're an IP network, but it's a good comparison
edit2: ISPs bringing CDN servers/equipment in-house is a good way to mimic other forms of TV distribution, but it is expensive as it requires bandwidth upgrades to support the constant stream of data coming into their network which their users may not ever request.
I for one would like to see a p2p multicast protocol for super fast file delivery, no more queuing for a download, you just get whichever part is being sent out at that time.
Or Dropbox/Google Drive uploads that automatically send to the different geographical endpoints rather than wait for the data centre to replicate it...
It's plain old broadcast/downlink. A digital stream multiplexed with MPEG-2 or MPEG-4 channels of video data. There's also an in-band signalling stream for other uses (guide data, turning subscribers on and off, etc).
I worked on a number of prototype devices with this technology. Qualcomm even launched a service in the USA using their DVB-H variant called MediaFLO. Target and Best Buy sold MediaFLO player units!
We were ready to go. Test transmissions were happening all over the world...and then the iPhone launched. People could watch YouTube on their phones and the desire for mobile broadcast TV evaporated, literally, overnight. MediaFLO shut down about a year after launch.
(ATSC-8VSB eventually adapted to the technical needs for mobile, but nobody cares anymore).