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TM
The Mind, The Many, The Music.



Registered: 06/11/02
Posts: 8,282
Loc: Under The Table And Dream...
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Cable Users, HDTV Bandwidth - OMG! WTF?!
#5562299 - 04/27/06 10:23 AM (17 years, 9 months ago) |
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I just recently realized how much actual bandwidth is available through 75ohm coax.
With a dual-tuner HD-DVR cable box, you can fill a 120Gig hard disc in just 6-7 hours! (HD 1080i with Dolby 5.1 takes around 10Gig per hour to store.)
If you had three of them, say one in the living room and one in each of 2 bedrooms, you could do that on all three from 6 different High Definition channels, simultaneously! 
That's 360 Gigabyte downloaded in just 7 hours!!! 
Look at how limited your Internet bandwidth is compared to your total possible bandwidth. Cable companies SUCK!
-------------------- ================================================
"Have some congratulatory drugs." - C. Montgomery Burns I'll probably always do drugs, so that just contributes to the addiction to The Shroomery... It's a vicious circle of bliss. TM™
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Penguarky Tunguin
f n o r d

Registered: 08/08/04
Posts: 17,192
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: TM]
#5562658 - 04/27/06 12:24 PM (17 years, 9 months ago) |
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Are you really surprised??
-------------------- Every mistake, intentional or otherwise, in the above post, is the fault of the reader.
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poke smot!
floccinocci floofinator


Registered: 01/08/03
Posts: 5,248
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! *DELETED* [Re: Penguarky Tunguin]
#5562666 - 04/27/06 12:27 PM (17 years, 9 months ago) |
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Post deleted by poke smot!Reason for deletion: x
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badchad
Mad Scientist

Registered: 03/02/05
Posts: 13,372
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: poke smot!]
#5562811 - 04/27/06 01:17 PM (17 years, 9 months ago) |
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A couple things although I certainly am not an expert.
My scientific atlanta 8300HD has a 160 gigabyte hard drive and is advertised as holding 20 hrs. of HD content. This is probably under "optimal" conditions and would average out to 8 GB/hr. Certainly a high rate, but the number of people receiving the signal is probably far less than say, the number of users browsing a website.
I'm not sure how "splitting" works, but I don't think splitting implies more bandwidth. For instance, at some point you would have to run another line to the house (e.g. you couldn't keep splitting indefinetly).
Poke: There's really no way an HD movie could be 4-6 gigs. Regular DVD fits on an 8.4 G DVD and HDTV is double the resolution (roughly).
-------------------- ...the whole experience is (and is as) a profound piece of knowledge. It is an indellible experience; it is forever known. I have known myself in a way I doubt I would have ever occurred except as it did. Smith, P. Bull. Menninger Clinic (1959) 23:20-27; p. 27. ...most subjects find the experience valuable, some find it frightening, and many say that is it uniquely lovely. Osmond, H. Annals, NY Acad Science (1957) 66:418-434; p.436
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TM
The Mind, The Many, The Music.



Registered: 06/11/02
Posts: 8,282
Loc: Under The Table And Dream...
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: badchad]
#5562979 - 04/27/06 02:08 PM (17 years, 9 months ago) |
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Quote:
badchad said: A couple things although I certainly am not an expert.
My scientific atlanta 8300HD has a 160 gigabyte hard drive and is advertised as holding 20 hrs. of HD content. This is probably under "optimal" conditions and would average out to 8 GB/hr. Certainly a high rate, but the number of people receiving the signal is probably far less than say, the number of users browsing a website.
I'm not sure how "splitting" works, but I don't think splitting implies more bandwidth. For instance, at some point you would have to run another line to the house (e.g. you couldn't keep splitting indefinetly).
Poke: There's really no way an HD movie could be 4-6 gigs. Regular DVD fits on an 8.4 G DVD and HDTV is double the resolution (roughly).
I'm no expert either, but I know that commercially made DVD's hold up to 17GB and are produced in a resolution of 720p, the lower res. of HDTV which is what your 8300HD is rated to hold 20 hours of.
You may be quite correct about the fact that you mayn't be able to have 3 DVR's pulling down 6 channels of 1080i x 5.1 simultaneously from one line, but even the fact that I can pull two channels at once while getting over 6Mb/s on the web is a demonstration of quite serious bandwidth.
I wish they'd open up the Internet bandwidth more freely, the cheap bastards. I know they will eventually. Comcast is already offering 8Mb/s for $10 more a month than the standard 6Mb, which has been doubled from 3Mb/s which was doubled from 1.5Mb/s all in the past 3 years.
-------------------- ================================================
"Have some congratulatory drugs." - C. Montgomery Burns I'll probably always do drugs, so that just contributes to the addiction to The Shroomery... It's a vicious circle of bliss. TM™
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darkfly
LysergicExperimenter

Registered: 09/16/01
Posts: 1,169
Last seen: 8 years, 5 months
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: TM]
#5563013 - 04/27/06 02:20 PM (17 years, 9 months ago) |
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Commercial DVD's hold ~9 GB and are in 480P - Hence the new HD-DVD and BluRay technologies coming out.
-------------------- Everything Is Blue In This World. The Deepest Shade Of Mushroom Blue.
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badchad
Mad Scientist

Registered: 03/02/05
Posts: 13,372
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: TM]
#5563032 - 04/27/06 02:24 PM (17 years, 9 months ago) |
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Actually you were right in the first place.
In fact, it seems the bandwidth is even higher then I expeceted. I posted the same question in an HDTV forum I frequent. The first response I got contained the following:
"The "Pipe" coming to your house is usually 600-860 MHz. Each 6 MHz can handle roughly 39 Mb/sec, with 256QAM.
So 860MHz/6Mhz * 39 Mbps / 8 bits per byte * 3600 sec per hour = roughly 2500 GB/hour. Plenty for a number of TVs, STBs, etc.
The bandwidth allocated to your modem is usually now limited by a setting on the modem that the service provider controls. For most cable companies, that setting is around 5-10 Mbps for the broadband service."
-------------------- ...the whole experience is (and is as) a profound piece of knowledge. It is an indellible experience; it is forever known. I have known myself in a way I doubt I would have ever occurred except as it did. Smith, P. Bull. Menninger Clinic (1959) 23:20-27; p. 27. ...most subjects find the experience valuable, some find it frightening, and many say that is it uniquely lovely. Osmond, H. Annals, NY Acad Science (1957) 66:418-434; p.436
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TM
The Mind, The Many, The Music.



Registered: 06/11/02
Posts: 8,282
Loc: Under The Table And Dream...
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Re: Cable Users, HDTV Bandwidth - OMG! WTF?! [Re: badchad]
#5563048 - 04/27/06 02:31 PM (17 years, 9 months ago) |
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Well, in that case it's just that the cable company has to pay someone for their pipe to/from the Internet, so they squeeze it down on our end so that they profit more.
Darkfly, yes, you're right, my mistake.
-------------------- ================================================
"Have some congratulatory drugs." - C. Montgomery Burns I'll probably always do drugs, so that just contributes to the addiction to The Shroomery... It's a vicious circle of bliss. TM™
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