DonLibes
Premium,ExMod 2001
join:2003-01-19 | Render CableCards useless?
Could someone explain why SDV would render CableCards useless? |
|
RadioDoc
Sortofadog
Premium,ExMod 2000-03
join:2000-05-11
Chicago, IL
edit:
February 8th, @02:51PM
| They are only one way and cannot talk to the headend to tell it what channel to send. The purpose of this adapter is to give it a return channel.
--
Toolmaster of La Grange. |
|
AZwldcats
Ummm That's Right
join:2001-02-20
Tucson, AZ
clubs:
| reply to DonLibes
What is SDV?
SDV stands for Switched Digital Video, a scheme where not all TV channels are broadcast out from the cable headend to the homes that it serves all of the time. This is attractive to cable companies, because they can offer more TV channels than their cable plant has the bandwidth to broadcast. For example, you cable company may have 10 different channels in your lineup, but only 5 physical channels to send them from the headend to the houses they service. This requires a cable box that can communicate back upstream to the headend and say “I would like to watch ESPN2HD now” and then headend would take that request, assign it to a frequency and then tell the cable box “ESPN2HD is available on xxx,xxx kHz”
Taken from:
»www.tivocommunity.com/tivo-vb/sh···t=357703 |
|
DaveNJ
No Fear
join:1999-09-01
New Jersey
 ·Patriot Media
 ·Cingular Wireless
 ·Verizon Online DSL
| reply to DonLibes
Its cables way of hurting there revenue, anyone with an non upgradable HDTV will become useless. Because Cablelabs was too stupid to think a few years ahead. So a TV set bought in a store today, will be obsolete in a few months. I cant believe they are getting away selling them. Yet there was a mandate for analog sets. |
|
djrobx
join:2000-05-31
Valencia, CA
 ·AT&T U-Verse
 ·AT&T CallVantage
·Time Warner VOIP
·RoadRunner Cable
·DSL EXTREME
| reply to DonLibes
quote:
Could someone explain why SDV would render CableCards useless?
Normally all HD channels are broadcast together, simultaneously, on different frequencies. The "guide" has information on where each channel is actually located. So when you want ABC-HD, your tuner might tune, say channel 106, stream #1, and plays it back.
But with much bandwidth as HD channels require, cable operators are moving to SDV, which makes the system operate more like an "on demand" channel. The cable box says, "Customer wants to watch Food-HD" and the cable system begins broadcasting it on a certain frequency so the box can tune into it. This will allow them to offer a virtually limitless amount of more obscure channels.
CableCard TiVo is a one way system, it has no way to tell the cable company what the user is selecting. The USB adapter will remedy that. |
|
RadioDoc
Sortofadog
Premium,ExMod 2000-03
join:2000-05-11
Chicago, IL
·AT&T Midwest
| reply to DaveNJ
It is only "useless" if you are beholden to cable and don't want the cable box. There are not that many people using CableCARDS (which attach directly to the TV) and instead connect to the cable company converter box via component or HDMI (or, if you don't fix the Comcast install, composite) inputs. Those are hardly "obsolete".
--
Toolmaster of La Grange. |
|
AZwldcats
Ummm That's Right
join:2001-02-20
Tucson, AZ
clubs:
edit:
February 8th, @04:10PM
| reply to DaveNJ
Dave,
CableLabs doesn't make devices.... Just certifys products... Kinda like UL does...
And all technology will get replaced.... It's just a matter of time...
Shame on people for not having a crystal ball... |
|
DaveNJ
No Fear
join:1999-09-01
New Jersey
·Patriot Media
·Cingular Wireless
·Verizon Online DSL
| said by AZwldcats  :Dave, CableLabs doesn't make devices.... Just certifys products... Kinda like UL does... And all technology will get replaced.... It's just a matter of time... Shame on people for not having a crystal ball... So if the cablecos cared, they would tell manufactures to stop selling CC1 sets. Since they will not be supported. Will CC2 (tru2way) sets arriving soon, or CC2+. Cable should support customers, not saying incredible silly things like technonlogy you purchased a year ago is obsolete, and its your fault. Then they wonder why FIOS is doing so well. |
|
bstran
@glhp.com
 from:
tishoo
| reply to djrobx
said by djrobx :Normally all HD channels are broadcast together, simultaneously, on different frequencies. The "guide" has information on where each channel is actually located. So when you want ABC-HD, your tuner might tune, say channel 106, stream #1, and plays it back. But with much bandwidth as HD channels require, cable operators are moving to SDV, Actually, you're wrong. One digital channel, even broadcasting at 1080p resolution, only takes up a third of the space of an entire analog channel. An analog channel is 6 Mhz wide, a digital channel is only 2 Mhz wide. So you're conclusion that they're trying to save bandwidth doesn't make sense. They're only trying to get you to get their "great dvr cablebox" so that they can leech more money out of you. Total money grab! |
|
