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story category Time Warner: Switched Digital
SDV trial bandwidth savings 'exceeded 50%'
(old news - 02:16PM Monday Apr 17 2006)
tags: Video · hardware · bandwidth · cable · networking
We mentioned last week that many MSOs are tinkering with switched digital video (aka switched digital broadcast) technology. The tech frees up bandwidth on cable systems by delivering fewer channels to the cable-box, and keeping the rest waiting at the edge router. This Communications Technology report has more, offering some insight into Time Warner Cable trials.
"A trail by Time Warner Cable in Austin, TX, found that only 45 out of 170 channels were being simultaneously viewed in a service group of 1,000 homes. The rest of the 125 channels occupied spectrum while being unused by subscribers. By creating virtual programming with SDV, bandwidth that is saved can be used for other services such as high-speed data, VOD, VoIP and HDTV."
Time Warner - the most aggressive of the MSOs on this front - says they've deployed the technology in three markets, with four to six planned next year. Bandwidth savings from the technology has "exceeded 50 percent", and the companies claim the change is transparent to the end user (no channel changing delay).

Related:
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  2. Friday Morning Links
  3. Cablevision Network DVR: 160GB, $10/Month
  4. Time Warner CableCARD Fix On The Way
  5. Economy Worries Slowing DOCSIS 3.0 Rollouts
  6. Comcast: 50Mbps Now Available In 20% Of Markets
  7. Virgin Takes Aim At BitTorrent
  8. DOCSIS 3.0 Gets Faster
Forums » Time Warner: Switched Digital
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MxxCon

join:1999-11-19
Brooklyn, NY
clubs:

Shall we dream

that with this bandwidth savings they will offer truly faster/uncapped inet w/o price increase?
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smcallah

join:2004-08-05
Home

Re: Shall we dream

Of course you can dream of it.

en102
Canadian, eh?

join:2001-01-26
Valencia, CA
·RoadRunner Cable
·DSL EXTREME
·DSL EXTREME

yeah right... businesses look at it this way.

1) supply / demand If there's a demand, they can charge more $$$. If there's too much supply (FiOS), they can't.
2) more service offerings with existing infrastructure... i.e. more VOD/VoIP/HSI/HDTV without big changes.

Companies won't put out extra bandwidth until they need to (or need to justify cost of service).

WileEC
mindtaker, macky cat, etc.

join:2002-02-07
Yonkers, NY
·Verizon FIOS

Putting the tuner at the cable co?

Essentially this puts your tuner at the cable co. That means that everything has to come through a limited number of set-top boxes in your home limiting what you can watch and record when and with what equipment (DVRs, VCRs, etc). Seems like a bad idea to me.
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compugeek
Have you pooped today?
Premium
join:2002-07-30
Pickerington, OH

Re: Putting the tuner at the cable co?

said by WileEC See Profile :

Essentially this puts your tuner at the cable co. That means that everything has to come through a limited number of set-top boxes in your home limiting what you can watch and record when and with what equipment (DVRs, VCRs, etc). Seems like a bad idea to me.
If you watch a channel it will just start a new stream to that box. If no one is watching a channel anyplace there is no stream going anyplace and so then that is freed up bandwidth to use up for something else. Almost a dynamic bandwidth usage. It could potentially save the cable companies money since they would not have to maintain all of the spectrum in the plant. It could also lower the cost of cable and equipment since more of the DVR functions and such would be located in the headend.

Now for your old VCR, yeah you could be screwed.

Geek
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vpoko
Premium
join:2003-07-03
Jamaica Plain, MA
·Comcast

Re: Putting the tuner at the cable co?

said by compugeek See Profile :

Now for your old VCR, yeah you could be screwed.
Why's that? Your VCR sits in between your cable box and TV, the cable box still requests the digital feed from the edge router, and then gives it to the VCR.

compugeek
Have you pooped today?
Premium
join:2002-07-30
Pickerington, OH

Re: Putting the tuner at the cable co?

But if you don't have a cable box and don't want to pay for one like lots of people do... Your Screwed.

Geek
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vpoko
Premium
join:2003-07-03
Jamaica Plain, MA

Re: Putting the tuner at the cable co?

This doesn't get rid of the cable box - you're still getting lots of compressed digital signals that need to be decoded on your end - it's just that channels nobody is watching in your area at the moment aren't sent as part of the budle.

roamer1
sticking it out at you

join:2001-03-24
Atlanta, GA
clubs:
·VoicePulse Connect
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said by WileEC See Profile :

Essentially this puts your tuner at the cable co. That means that everything has to come through a limited number of set-top boxes in your home limiting what you can watch and record when and with what equipment (DVRs, VCRs, etc).
No...you still can have as many TVs on as many channels as you want.

What SDV does (AIUI) is to put less-watched channels on the wire only when it's being watched. It's more or less the same delivery method used for VoD ("switched" QAM feeds) applied to regular cable channels.

IMO, the need for SDV will lessen significantly once the FCC allows cable companies to turn off analog.

-SC
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Blasterbator
Sent By Grocery Clerks

join:2001-02-20
Jackson, MS
·Cox HSI

Re: Putting the tuner at the cable co?

The analog device issue has nothing to do with switched digital deployment.

Once the channel is digital and delivered to the home as such, an STB or CableCard enabled device is required to decode and/or decrypt it.

Switched digital actually relieves some of the pressure to convert analog channels to digital, since (if done properly) it will actually make more efficient use of the bandwidth on the plant used to deliver digital channels to the home.

scavio
Premium
join:2001-07-14
Melmac
clubs:

Ouch

quote:
A trail by Time Warner Cable in Austin, TX, found that only 45 out of 170 channels were being simultaneously viewed in a service group of 1,000 homes. The rest of the 125 channels occupied spectrum while being unused by subscribers.
Sounds like a la carte is in order!

In all seriousness, it is pretty sad that basically 25% of the channels have 100% of the viewership in the trial. I wonder how much the filler ends up costing.
Awaking

join:2004-11-29
00000

Re: Ouch

Wouldn’t this also mean they would have a better accuracy when do ratings?

en102
Canadian, eh?

join:2001-01-26
Valencia, CA
·RoadRunner Cable
·DSL EXTREME
·DSL EXTREME

Re: Ouch

I wonder if Cable companys will resell data collected from channel viewing stats.
Unlike analog tv or satellite, this form of cable (similar to what Telco's want to push) will be able to collect all sorts of channel surfing stats from ALL viewers.
moonpuppy

join:2000-08-21
Glen Burnie, MD
·Verizon Online DSL

Re: Ouch

said by en102 See Profile :

I wonder if Cable companys will resell data collected from channel viewing stats.
Unlike analog tv or satellite, this form of cable (similar to what Telco's want to push) will be able to collect all sorts of channel surfing stats from ALL viewers.
Of course they will. TIVO does it. This will be another revenue stream for the cable companies.

crazediamond
That's Dr. Craze to you
Premium
join:2002-01-19
Germantown, MD

I was gonna say, this sounds like great proof that a la carte has some grounding in reality. At first I was surprised a cable company would let something like that out, then I decided that they'd use it as proof of why they can't do a la carte and realized that we're screwed :P
--
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nanoflower

join:2002-07-14
30876

Re: Ouch

Well, ala carte has a number of other issues among them the long term agreements that the content providers have with the cable companies. I doubt the cable companies like Comcast really want to take up their bandwidth with something like all of the additional channels that ESPN requires them to carry in order to get ESPN like ESPN Classic. Any highly watched channel can use that desirability to force the cable company (and satellite companies) to carry additional channels. I can't see the content companies giving up that power in an ala-carte world. So you might just want ESPN, but you will also get ESPN Classic, ESPN News, ESPN 2 ... ESPN TiddlyWinks.

At least in a switched video world the cable company isn't forced to use all of that bandwidth all of the time. Although I very much doubt that channel changes are done without any slowdown. They probably mean there is no slowdown over the existing slow changes on their digital settop.
liquidnw

join:2005-06-05
Bronx, NY

Re: Ouch

Well hopefully using this technology they will actually use the save bandwidth for more HD channel, faster net speeds, etc. Not they won't have that excuse anytime someone request a channel.

On the al la carte front. What i find amazing is that cable companies always complain about being forced to carry ESPN along with all the additional channels. Meanwhile these same companies which own channels do the very same thing. Comcast forces channels in bundles, cablevision for years forced the metro channels with MSG & FSNY. Time warner bundles TBS,TNT,TCM etc. If they hate it so much why do they continue to do it?
nanoflower

join:2002-07-14
30876

Re: Ouch

The cable companies force their own bundles on consumers because it benefits them. They becry the bundles forced on them by the content providers because it costs the cable companies. Anything that can be seen as eating into profits will be complained about.

As to the channel selection they will also be unwilling to add new channels until a large number of customers ask for it. That's because it costs them some money to get the rights to carry the channel plus there will be equipment to setup and ongoing maintenance even in a switched digital network. Also there is still a limit on how much bandwidth they have on their internal network. It's not as bad as with coax, but it's still has limits. So they will hold back adding new channels unless they percieve there is significant interest or the content provider is able to give the cable company a good reason to carry the new channel (part of a package with channels the cable company wants, or a financial incentive.)
liquidnw

join:2005-06-05
Bronx, NY

Re: Ouch

I'm sorry but while that should be the way new channels are added thats not the way they go about it. For example I'm a cv sub in NYC. For years people were asking for FX to no avail. Channels like Telmundo Puerto Rico,Logo,Vh1 Soul, etc were added instead until recently Fx was finally added. Even in the coming weeks they will be adding BBC World news. I'm sure there was not an outcry of request for it.

As far as equipment etc, its not like these are start up companies they have stuff in place it takes little more that getting the feed from a sat and mapping it to the correct frequency on there network. Not that difficult time consuming or expensive. I bone is they constantly complain about bandwidth being the reason for not adding certain channels well now that they claim switched video will free them of that constraint I would like to see some action for a change. Cable companies are notorious for bragging about what there systems can do with little action. I would just like to see some action now that there bandwidth constraint will be eased.

SRFireside

join:2001-01-19
Houston, TX
·RoadRunner Cable

Sounds like a job for mini-bundles. If you want sports you take the sports bundle with all the ESPN channels and such. Kids bundle can have Nick, Disney, Boomerang and such. Educational bundle can have all the flavors of Discovery, History Channel and such. You get a general viewing bundle that will have the common networks and some municipal and other channels while you pick out the extra bundles for extra viewing. Some bundles would cost more (like ESPN) while others can be more affordable. The less bundles you subscribe to the lower your cable channel. Simple.

Thorax
Premium
join:2003-09-13
Huntington Beach, CA

Yep, and it works too :)

They are doing that here in Huntington Beach Ca.
That is why we have either 10/1 as standard or 15/2 as premium.

Still can't wipe the smile off my face with a beltsander

oliphant
I Have 8 Boobies
Premium
join:2004-11-26
Corona, CA


edit:
April 17th, @02:43PM

Re: Yep, and it works too :)

They're only doing that because of FIOS deployments in HB...it has nothing to do with this technology.

So much for "fear of competition not being a factor".

--
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ignorant

join:2006-03-26

Re: Yep, and it works too :)

Yeah there's no switched video going on in Huntington Beach, there are higher HSD speeds due to Fios..but the standard Road Runner speeds are 7/512, not 10/1.

dvd536
as Mr. Pink as they come
Premium
join:2001-04-27
Phoenix, AZ

Re: Yep, and it works too :)

said by ignorant See Profile :

Yeah there's no switched video going on in Huntington Beach, there are higher HSD speeds due to Fios..but the standard Road Runner speeds are 7/512, not 10/1.
you mean TW finally upgraded that paltry 384kbps upload to 512? woot woot!
--
You can never be too rich, too thin or have too much Bandwidth
ignorant

join:2006-03-26

Re: Yep, and it works too :)

Yeah but not everywhere yet...as far as I know it's only around FIOS areas for now. 7/512 standard 15/2 prem.
amungus
Premium
join:2004-11-26
America
clubs:
·Cox HSI

i wonder...

so this means that there really is "nothing ever on."

50% savings, that's funny. so many wasted channels, and so much wasted time on the ones that people do watch.

I wonder if they have, say, 3 channels at once coming in, it says 'fewer' in the article... that would allow near instant channel changing at least.

really, this makes perfect sense. why waste available megahertz of space on your line for some channel that maybe one guy fell asleep to? they could serve up those few, and still "gain" space around it.

only problem is if it ever got "full" when they were counting on that "gained" space... or could that even happen??? I need to read up more on the details of this before commenting too much.

jjoshua
Premium
join:2001-06-01
Scotch Plains, NJ

New error message

ERROR: All streams are busy now. Please watch a different channel until a stream becomes available. Your request is #5 in the queue.

TK Junk Mail
Go ahead, make my day
Premium
join:2002-03-03
Margate City, NJ
clubs:
·Comcast

Re: New error message

said by jjoshua See Profile :

ERROR: All streams are busy now. Please watch a different channel until a stream becomes available. Your request is #5 in the queue.
And that is the risk they take if they oversubscribe the available bandwidth. Do that too often and they lose customers.
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moonpuppy

join:2000-08-21
Glen Burnie, MD
·Verizon Online DSL

Re: New error message

said by TK Junk Mail See Profile :

said by jjoshua See Profile :

ERROR: All streams are busy now. Please watch a different channel until a stream becomes available. Your request is #5 in the queue.
And that is the risk they take if they oversubscribe the available bandwidth. Do that too often and they lose customers.
Like it hasn't happened with broadband service now.
grandpinaple

join:2006-01-03
New York, NY
Is this an IRC joke?
emptywig
Huh? What?
Premium
join:2002-08-05
Pasadena, TX

My Channel-Change Lag is Horrible As It Is!

Since Time-Warner changed the on-screen menu system a few months ago, my channel-change lag is terrible! And if I switch to an HD station accidentally, I may lose control of the box for as much as 45 seconds (I don't have Hi-def). Then it won't display video and I have to power-cycle the box. The OSD doesn't keep up with the box when you're clicking through channels quickly... It's really awful.

Sorry, a little OT, I know.

wig
John104

join:2002-01-07
Pasadena, TX

Re: My Channel-Change Lag is Horrible As It Is!

I have the same problem.
Channel-Change lag is terrible.
TW says it is normal for digital.
If that is the case, I want analog back.
Maybe it's just in Pasadena.
emptywig
Huh? What?
Premium
join:2002-08-05
Pasadena, TX

Re: My Channel-Change Lag is Horrible As It Is!

My digital was fine before the OS Menu system changed. It wasn't great, but it was WAY better than it is now.
iamwong

join:2001-01-05
San Francisco, CA

Now it takes you 20 seconds to switch channel

I would be very pissed if every channel switch takes 20 seconds, and I will never get cable anymore.
alfnoid
Premium,MVM
join:2002-02-18
·Comcast

The end of cable ready??

The biggest drawback I see to this is that it would end the usefulness of the cable ready TV.

It would keep me from using my little 13" that I watch about 5 hours of TV on a month from working as I would never pay extra for a box for this little TV. I do enjoy what little tv I watch on it though.

Honestly...who wants to put a box on every single TV in the house?

peace

EGeezer
Freezin' Season
Premium
join:2002-08-04
Country!
·RoadRunner Cable
·AT&T CallVantage

Re: The end of cable ready??

said by alfnoid See Profile :

Honestly...who wants to put a box on every single TV in the house?
Time Warner, for one - then they can charge by the box, claiming the boxes are necessary and they are merely "passing along the cost" in their next double digit rate increase.
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LeeWL

join:2002-11-10
Morrisville, NC

said by alfnoid See Profile :

The biggest drawback I see to this is that it would end the usefulness of the cable ready TV.

It would keep me from using my little 13" that I watch about 5 hours of TV on a month from working as I would never pay extra for a box for this little TV. I do enjoy what little tv I watch on it though.

Honestly...who wants to put a box on every single TV in the house?

peace
It will also cause serious problems with Cable Cards since they mere designed before any of this.It really sucks as they were just required to provide them by the FCC and you could finally ditch the cable box for the nice plasma or LCD hanging on teh wall. Now they come out with a technology that most likely renders the current cards obsolete.

djrobx

join:2000-05-31
Valencia, CA
"Cable ready" is being replaced with CableCard, and this sort of scheme could be made to work with a cable card.

Satellite has always needed a box per TV and people deal with it.
--
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biochemistry

join:2003-05-09
92361
As someone else pointed out, this will take the pressure off the cable companies to dump their analog offerings (which would alienate a ton of customers). Hence your little 13" TV will continue to work.
Forums » Time Warner: Switched Digital


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