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SDV FAQ

Discussion in 'TiVo Series3 HDTV DVRs' started by bdraw, Jul 3, 2007.

  1. Aug 30, 2007 #281 of 2401
    vman41

    vman41 Omega Consumer

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    Welcome to America.
     
  2. Aug 30, 2007 #282 of 2401
    ah30k

    ah30k Active Member

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    I should caveat my responses... Although I am generally aware of the SDV design, exact details may be slightly different. The exact implementation of the protocols and sequence diagrams for switching and the DVR recording are a good example of specifics which I may be wrong on.
     
  3. Aug 30, 2007 #283 of 2401
    LoREvanescence

    LoREvanescence Always Autocorrected

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    Salem, MA

    Well to me at least. This all makes since when there comes a point where bandwidth could start becoming an issue. Sadly, I wish it wasn't the direction things were going or that tivo supports it now.

    What is the latest with turning off analog cable. In systems where they turn it off is this an alternative to sdv or will they still use sdv after turning off analog cable.

    From reading through the avsforum today it seams that Comcast have already pulled the plug for analog cable in Chicago leaving only local access channels as analog. They are making this move becuase the majority of homes in the city already have digital cable, for those who don't, comcast is providing a free STB as a solution. It seams that they are now turnign off analog channels in the suburbs over the next few months.


    Is this a likely trend that we will see in more cities in the near future to a lot for more space for digital content? What is the latest information as to what the cable industry is doing in terms of analog cable over the next few years.
     
  4. Aug 30, 2007 #284 of 2401
    ah30k

    ah30k Active Member

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    And people started screaming that their S2DTs were now rendered merely single-tuners and they needed STBs for every TV. You are always going to piss someone off. It is just a matter of who.
     
  5. Aug 30, 2007 #285 of 2401
    HiDefGator

    HiDefGator New Member

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    Turning off analog just delays when they deploy SDV. Eventually they will do both.
     
  6. Aug 30, 2007 #286 of 2401
    jordanz

    jordanz A is A

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    Why don't they go to a packet-switched type of protocol (ala TCP/IP)? This SDV thing seems like a big hack to me.
     
  7. Aug 30, 2007 #287 of 2401
    ah30k

    ah30k Active Member

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    Incremental changes to the headend and STB base over time as opposed to a massive switch-out of the entire infrastructure. Cable company investors would not tolerate the kind of cost impacts necessary to switch the underlying tech.
     
  8. Aug 30, 2007 #288 of 2401
    LoREvanescence

    LoREvanescence Always Autocorrected

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    Jun 19, 2007
    Salem, MA

    Well, it's true, there is always someone thats going to be pissed off. Such is the life of adapting new technology to replace a older one. I just wish this one 1 way 2 way ocap thing could have been settled by now, not changing every couple of months leaving third party devices out of the circle.
     
  9. Aug 30, 2007 #289 of 2401
    jordanz

    jordanz A is A

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    I see. This does, however, seem like an interim solution. They're banking on each SDV "node" only needing a subset of the total available channels. At some point in the future they'll need to look at a better technology.
     
  10. Aug 30, 2007 #290 of 2401
    ah30k

    ah30k Active Member

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    You know, that would have been the one solution that would seem to leave virtually no one pissed off except the cable companies.
     
  11. Aug 30, 2007 #291 of 2401
    MickeS

    MickeS New Member

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    Are you saying no business every makes costly mistakes?

    I guess I just don't see the benefit of this in the long run, vs going all digital and building out capacity. I see the near-term benefits. I guess the costs are small enough that they feel they are OK.
     
  12. Aug 30, 2007 #292 of 2401
    jrm01

    jrm01 New Member

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    Is my dongle going to send back the proper response if Tivo is recording a SDV channel and I'm not home?
     
  13. Aug 31, 2007 #293 of 2401
    ah30k

    ah30k Active Member

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    Hence why I am not betting on the magic dongle any time soon.
     
  14. Aug 31, 2007 #294 of 2401
    DCIFRTHS

    DCIFRTHS I dumped SDV / cable

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    Reading your post, it sounds like you have one already, so maybe you should tell us :)

    If the dongle didn't provide this basic functionality, then it wouldn't be a solution for TiVo. I doubt that TiVo would deploy the dongle if it didn't support TiVo's most basic functions.
     
  15. Aug 31, 2007 #295 of 2401
    VinceA

    VinceA New Member

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    The 'dongle' seems to be almost entirely for TiVo (and any future other CableCard DVRs). Are there any CableCard TVs that have the required USB port that the dongle would need?
     
  16. Aug 31, 2007 #296 of 2401
    BobCamp1

    BobCamp1 Active Member

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    Well, this is how your cell phone service has worked. Voice channels are only dedicated to your phone one a call is established. Once the call is completed, the channel is released back into the pool of available channels. The channels that are used to handshake between your phone and the tower are much smaller in nature, so the system can support many more of those channels than voice channels. The same technology is used for landline phones too.

    Yes, if everybody who owned a phone tried to call at the exact same time, the system gets congested. But unless a disaster occurs (9/11, hurricanes, etc.), no more than x% of people are using the service at any one time. In the past two years, the cable company has been busy watching your viewing habits and conducting trials in some markets to determine how many channels they can switch to SDV. If they implement it correctly, you won't notice a thing. Unless you're using an S3.

    The benefit is that it is a quick way to boost capacity without rewiring everyone's house to bring fiber directly to the house. They need a solution ASAP. I have FIOS -- my uplink speed is probably faster than your downlink speed. And it's the same price as your service. DirecTV will release a bunch of HD channels any day now. Cable is just trying to keep up.
     
  17. Aug 31, 2007 #297 of 2401
    wbertram

    wbertram Member

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    Of course, that is exactly how the SDV system works! Everybody who owns a TV sits down at 8:00PM and tries to tune to their favorite channel. And, the system gets congested, just like the phone system gets congested on Mother's Day, or after a catastrophe like 9/11.

    SDV only "increases capacity" when relatively few people are viewing TV.
     
  18. Aug 31, 2007 #298 of 2401
    ah30k

    ah30k Active Member

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    In practice, not everyone sits down to watch every channel on the map at 8:00. Most people tune to x channels at any given time where x is much smaller than y offered. SDV will and is working just fine in the areas where it is deployed without running out of slots. I don't know what else to tell you to make you feel any different. SDV actually works better during peak times because there is more concentration on fewer channels.

    When was the last time you could not reach you mother on Mothers Day on the first attempt?
     
  19. Aug 31, 2007 #299 of 2401
    philipl411

    philipl411 New Member

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    Maybe so, but if your pricing is correct, my bill would go down by 2/3. I don't watch any HBO types, no sports (I am told that ESPN type channels would cost $70+) I long for the "a la carte" system
     
  20. Aug 31, 2007 #300 of 2401
    HiDefGator

    HiDefGator New Member

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    Fortunately a huge majority of people watch the same 6 or 7 channels at 8:00 when they sit down making SDV possible.
     

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