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TiVo HD Platform Wild Spec Thread

Discussion in 'TiVo Series3 HDTV DVRs' started by HDTiVo, Jul 24, 2007.

  1. ZeoTiVo

    ZeoTiVo I can't explain

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    Jan 2, 2004
    not really speculation but straight from jim denny a TiVo rep in one of the many interviews he did to talk up the release.

    he stated it would be a eSata enclosure with striped raid inside for better reliability. I am looking forward to that and would for now just increase the size of the hard drive in the TiVo HD if/when I get one
     
  2. bkdtv

    bkdtv New Member

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    I doubt it has the firmware, but yes it has the hardware.

    The TivoHD can still overlay all sorts of menus and graphics. It just can't decode two video streams at once.
     
  3. HDTiVo

    HDTiVo Not so Senior Member

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    bktv:

    The above is awesome, thanks!

    I've put the link to the post in the OP.

    Notes:

    Not sure the ViXS handles two SD encodes at once (?)

    Philips/NXT SAA7138CHL does not take HD compnent in, but several other models do.
    http://www.nxp.com/acrobat_download/literature/9397/75015903.pdf

    The ATI 314 does not pass analog video transmissions to the Philips/NXT SAA7138CHL, that split happens earlier in the chain (?)

    ... Presumably as necessary depending on original recording format (?)
     
  4. vman41

    vman41 Omega Consumer

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    Striped RAID doesn't increase reliability, it's done to improve performance. Mirrored RAID give you better reliability. How many drives will be in this enclosure? 4 500 GB drives would give you a terabyte of striped, redundant storage (RAID 0+1), but would cost more than the TiVo itself.
     
  5. ZeoTiVo

    ZeoTiVo I can't explain

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    Jan 2, 2004
    Versus just a drive with no raid at all I meant. Yes it is not mirrored raid and a hard rive failure is still a failure but bad sectors can be dealt with better and that is the reliability I was referring too.
     
  6. HDTiVo

    HDTiVo Not so Senior Member

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    Nov 27, 2002
    I don't think Philips/NXT SAA7138CHL model handles component HD in; see notes I made above.
     
  7. JamieP

    JamieP Member

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    Aug 2, 2004
    A striped (RAID0) volume has (less than) half the MTBF of a single drive. Striping (without parity) reduces reliability over a bare single drive. Striping with parity (RAID3 or 5) is another matter. Perhaps that is what you/he meant.
     
  8. bkdtv

    bkdtv New Member

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    You're right. When I looked at that last night, I looked at the wrong field.

    The ATI 314 does not have an NTSC decoder, so it cannot produce digital output from an analog video signal.
     
  9. ZeoTiVo

    ZeoTiVo I can't explain

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    Jan 2, 2004
    yes, I had just not gone and studied the raid specs that I have not looked at in a year or more :D

    PS - I guess this all came out of the lame "raid" feature in Windows XP that does not do parity unless you have the hardware in palce for it anyway
     
  10. ZeoTiVo

    ZeoTiVo I can't explain

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    Jan 2, 2004
    so this means that the TiVo HD as is could not record HD from a component or HDMI gived the input is added?
     
  11. rodalpho

    rodalpho New Member

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    I'm sure he didn't actually mean it would be striped, because that would be crazy.

    Actually, since the internal disk has no redundancy at all, I see no reason why the eSATA addon drive would be any different.
     
  12. bkdtv

    bkdtv New Member

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    DC Metro Area
    That's correct. The most the SAA7138 in the TivoHD can accept is component 480p.

    However, Tivo could replace the SAA7138 with the SAA7137 to add 720p/1080i component input support. Those parts are not pin-compatible, however.
     
  13. HDTiVo

    HDTiVo Not so Senior Member

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    Nov 27, 2002
    Updated OP with the following:

    Based on comments from TiVoPony, it is unlikely the TiVo version of the ViXS chip has any transcoding ability.
     
  14. HDTiVo

    HDTiVo Not so Senior Member

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    Nov 27, 2002
    I know we've talked about possible use of the TiVo HD design for other models...

    On the back panel of the TiVo HD, looking from inside, there are several unused holes in the sheet metal. The holes are of two sizes, large looks like for an RCA plug, small like for a mini plug like IR blaster.

    There is one large hole above the HDMI port.

    Next to Ethernet, there is a column of two small holes.

    Next to that is a column of three large holes. midway between the top two holes, and just to their side, is a very small hole.

    Finally, before the eSata, there is another single large hole.

    These holes are all fully covered by the sticker that affixes to the outside of the back panel. But they are physically there for some reason.

    From a perspective two plus months further down the road, what might this be about?

    Perhaps a combo DT/TiVo HD unit that takes an input from a cable box. But, while there are enough holes for s-video and composite w/RCA audio, I don't see enough for component w/audio.

    Perhaps another set of composite/s/audio outputs...but their position away from the other outputs suggests otherwise, ie. inputs.

    -------

    Looking back at the Philips A/V decoder, it does not take an HD component input, thus pehaps limiting it to the DT style use of a single SD (S or Composite) input from a cable box.

    However, there are other chips in the same family that do handle HD component in. Maybe not such a big leap to something more then?

    I recall that one of the slingboxes takes an HD component in and encodes at something like 640x480. Could a true consumer level HD component source device be not so far away?
     

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