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TiVo prepping nex generation DVRs

Discussion in 'TiVo Roamio DVRs' started by bradleys, Jun 17, 2013.

  1. Aug 6, 2013 #521 of 1049
    mr_smits

    mr_smits New Member

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    I'm not sure I want to buy a stand alone Stream based on what I've read in the forums. Plus another box to plug in.

    At least I have an option.
     
  2. Aug 6, 2013 #522 of 1049
    davezatz

    davezatz Funkadelic

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    Right, but Virgin had the HDUI guide, season passes, etc months ahead of US retail customers. And they have apps like Twitter and Facebook that we've never seen...
     
  3. Aug 6, 2013 #523 of 1049
    innocentfreak

    innocentfreak Active Member

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    At least with the Stream you can plug it in anywhere as long as it is on the same network as the TiVo.
     
  4. Aug 6, 2013 #524 of 1049
    mr_smits

    mr_smits New Member

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    Compared to Stream support integrated on the chip, I'm not sure I see the advantage here.
     
  5. Aug 6, 2013 #525 of 1049
    slowbiscuit

    slowbiscuit FUBAR

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    No Android support, no sale here don't care whether it's Stream or on the box - both of our tablets are Android. Yet another reason why Tivo routinely gets lampooned in the tech press for releasing half-assed stuff.

    (And yes we know, it's not their fault Android was late to the game with DRM etc. etc. etc. I really don't care what the excuses are at this point, it's way overdue just like pretty much everything else Tivo.)
     
  6. Aug 6, 2013 #526 of 1049
    innocentfreak

    innocentfreak Active Member

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    It is only an advantage in the sense you aren't restricted to where you can plug it in. If I had to plug in the Stream at my TiVo it wouldn't be an option even for me.

    So while yes it is another box to plug in, you are pretty open to where you can plug it in.

    Also we still don't know if the Premiere 6 tuner will be a full Stream integrated. It could only offer a portion of what the Stream does. For example it could be limited to 1 feed rather than 4.
     
  7. Aug 6, 2013 #527 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    For what it's worth, the S5's chip can transcode 2 streams, compared to the Stream's 4 streams. Unknown if there would be a fixed limit of 1 on the S5 for some reason, but we know it's capable of 2.

    Plus, for now we don't know what kind of performance hit the CPU takes while transcoding is in progress. On paper it's a capable chip and it probably has dedicated transistors integrated on the die for it, but it's an intense process and still a question mark. Meanwhile, the Premiere CPU will turn to crap by just downloading a web video. :p
     
  8. Aug 6, 2013 #528 of 1049
    davezatz

    davezatz Funkadelic

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    DISH Hopper uses the same chip for integrated Slingbox capabilities. I'm not aware of any performance related issues, but I don't follow satellite hardware all that closely.
     
  9. Aug 6, 2013 #529 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    Yeah, I was wondering if anybody ever reported any performance issues too.
     
  10. Aug 6, 2013 #530 of 1049
    Philmatic

    Philmatic Member

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    The 6-Tuner TiVo's CPU is similar to the ARM Cortex-A12/Apple A6X, so a huge increase in speed. What isn't clear is if the DMIPS calculation is per core or total. The A12/A6x can do 3K DMIPS PER Core, with two cores standard. Broadcom only specifies 3K DMIPS, not clear if that it total or 3K DMIPS per core.
     
  11. Aug 6, 2013 #531 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    I've been confused by this too because they say both depending on the webpage/press release.

    http://www.broadcom.com/products/Cable/Cable-Set-Top-Box-Solutions/BCM7425
    "Broadcom's 40nm MoCA 2.0-integrated STB and Gateway platforms are powered by its high performance dual thread Zephyr (MIPS®-based) CPU that delivers 3000 DMIPS with industry-leading processor capability."

    http://investor.broadcom.com/releasedetail.cfm?ReleaseID=541251
    "In the media server cable, satellite and IP STB market, Broadcom introduces two new 40nm cable STB SoCs that feature an ultra-high performance MIPS®-based 1.3 GHz dual threaded applications processor with an additional 3000 DMIPS of hardware processing performance, totaling 6000 DMIPS."

    The second quote goes on to describe the 7425 and 7424. I don't know what to make of it. Since 3000 DMIPS is still a significant boost I'm not complaining either way.

    I would still like to know what the Mini's CPU's processor performance is, but they don't publish the 7418 data.
     
  12. Aug 6, 2013 #532 of 1049
    Philmatic

    Philmatic Member

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    The second quote leads me to believe that they mistakenly omitted the "per core" designation in the PDF. It's easier to omit something, than to claim something that isn't true.

    The reason I am fixated on single thread performance is because that is where we are likely to get the best bang for our performance buck. It's nice that we have two cores, that will allow for more simultaneous work, but single thread performance will be the most visible.

    The note about the new channel change engine is exciting as well.
     
  13. Aug 6, 2013 #533 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    This was an edit originally, but just making a new post instead...

    Some technical writeups itemize the transcoder and the "applications processor" separately. So I'm wondering if the transcoder is its own unique 3000 DMIPS unit on the die, in addition to the 3000 DMIPS, 1.3GHz, dual-core Zephyr?

    EDIT:

    Dug up some more on the Zephyr.

    http://www.eetimes.com/document.asp?doc_id=1257982
    The Zephyr is the brand name for the BRCM 5000. It appears to be itself a dual core 1.3GHz chip with 3000 DMIPS of total performance. This is still 3x the dual-core Premiere, which should be suitable enough for the UI and apps. I agree, though, that the single core performance is where the bang is at.

    I'm guessing the transcoder may be its own 3000 DMIPS subsystem on the die.
     
  14. Aug 6, 2013 #534 of 1049
    Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    I'm not sure a transocder would be measured in DMIPS. It's a specialized chip designed only to do only one thing. DMIPS is a benchmark meant more for general purpose CPUs.
     
  15. Aug 6, 2013 #535 of 1049
    innocentfreak

    innocentfreak Active Member

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    It was answered after my post that it is 2 streams. I was just throwing out a number since I could see with the rest of the processing it would be limited so people might still want a Stream.
     
  16. Aug 6, 2013 #536 of 1049
    aaronwt

    aaronwt UHD Addict

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    I just deleted my post. I didn't realize there were alot more posts to read until I refreshed the page.
     
  17. Aug 6, 2013 #537 of 1049
    Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    I wonder if the new unit will be able to do two transcodes AND three streams to Minis at the same time? Or if it'll be 3 devices no matter if it's a Mini or an iPad?

    With the standalone Stream it can technically transocode 4 streams at a time, but a single TiVo can only feed it 3 streams out at a time, so you'd only ever max it out if you had two TiVos and at least one of the users was streaming something from the second TiVo.
     
  18. Aug 6, 2013 #538 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    That's probably correct. In any event there appears to be some sort of additional 3000 DMIPS subsystem on the die besides the general purpose CPU, whatever its purpose may be for.

    If they could harness it to handle apps/UI and DVR overhead separately, that'd be a bonus... but my pessimism would think that's probably not a right-away thing (kinda like dual-core support this generation.)
     
  19. Aug 6, 2013 #539 of 1049
    Dan203

    Dan203 Super Moderator Staff Member TCF Club

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    I'm betting the transcoder is independent of the main CPU, even if it is on-die, just like the GPU. So whether it's sitting idle or running at full capacity it will have no effect on the main CPU or the performance of apps. It's possible using it might cause a slight slowdown in bus or I/O operations, but TiVo will likely account for that and dedicate enough resources to the transcoding to keep it from interfering with the other functions of the box.
     
  20. Aug 6, 2013 #540 of 1049
    BigJimOutlaw

    BigJimOutlaw Active Member

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    Agreed. Whatever the subsystem is, Broadcom claims it has its own 3K of DMIPS, so if the transcoder isn't measured in DMIPS, this would be a third independent unit of some kind.
     

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