Anyone know if the Tivo Premiere is doing any video processing?

Discussion in 'TiVo Premiere DVRs' started by 1080p guy, Apr 3, 2011.

  1. Apr 3, 2011 #1 of 14
    1080p guy

    1080p guy New Member

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    Mar 29, 2011
    I am curious about this because I definitely see a more detailed picture than I can recall seeing when I was using my Sony DHG-HDD250 Dvr(Which I retired when I got the Premiere). It gives me some hope that I will gain some similar pq gains once my Comcast cable card is installed. My Comcast quality isn't horrible it is clean, very stable with decent color saturation, but I can tell I'm not watching my OTA feed because it does'nt appear to have some of the micro detail that makes the picture "feel" more dimensional. Im guessing this is due to the "compression" Comcast adds. Why on earth would you add compression to a HD signal, it absolutely defeats the whole purpose of Higher Definition. The Sony was no slouch at showing these differences, but as I said the Premiere looks better. I guess I'll have to wait & see if will to start looking for a DVDO Edge. It would be nice to have one more uncompromised HD source in addition to my HD-DVD,Bluray& OTA HDTV. Comcast looks a little like "HD lite" it will pass until "I" can "fix" it .
     
  2. Apr 3, 2011 #2 of 14
    Davelnlr_

    Davelnlr_ N5GGG

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    North...
    It all boils down to bandwidth. Comcast has to compress the signal, in order to fit all the channels their customers demand, on the cable. For what it is worth, DirecTv has plenty of bandwidth, but is missing about 15 or 20 basic HD channels which Comcast carries. I just dropped DirecTv and switched to Comcast, because I would rather watch channels in HD-Lite, than not watch them at all, or in blur o vision SD. Guess it is just a matter of preferences. My Comcast here, however, isnt that much different than DirecTv was. Sure I can tell a little difference on a 60" TV, but not that much. I improved the PQ a bunch just by getting the TV calibrated. I added a DVDO Edge to add back the "crispness" without adding in noise. Much improved now.

    It also depends what Comcast market you are in. As all cable systems are different, some have more bandwidth than others. At some point, the picture is going to degrade noticeably on a low bandwidth cable system (like one that still runs a full tier of analog SD channels (mine doesnt).
     
  3. Apr 3, 2011 #3 of 14
    smbaker

    smbaker Well-Known Member

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    Money. More channels squeezed into the same bandwidth.

    The better question is, why am I paying for comcast to deliver me worse quality than free rabbit ears can?
     
  4. Apr 3, 2011 #4 of 14
    1080p guy

    1080p guy New Member

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    I'm not paying Comcast for the "same" content, but herein lies the dilemna, I don't need that much more content. Comcast has gotten vastly better than it was years ago. I have to walk away when my sisters start talking about how great on Demand is . Oh well, I have stop thinking out loud I guess. On another note.. So the DVDO edge does a nice job, huh? I'll have start putting my pennies away !
     
  5. Apr 3, 2011 #5 of 14
    crxssi

    crxssi Veteran TiVo User

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    Apr 5, 2010
    Cox does the same thing.
    That is why I *do* use an antenna for all the local stations. The quality is much better.
     
  6. Apr 4, 2011 #6 of 14
    DeWitt

    DeWitt Member

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    Saratoga...
    With FIOS, you cant tell the difference between OTA and cable(IMHO). With Comcast and DirecTv the difference was very noticeable.
     
  7. Apr 5, 2011 #7 of 14
    1080p guy

    1080p guy New Member

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    Mar 29, 2011
    Yeah, I'm "Chomping at the bit" to get FIOS , but it's not available yet were I'm at in S. Jersey. (Local Comcast Sportsnet would have be available, also)
     
  8. Apr 5, 2011 #8 of 14
    lessd

    lessd Well-Known Member

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    I have Comcast (Hartford CT) and on network shows I get from 8MBytes to about 8.5MBytes per hour, what does OTA take in disk storage per hour ?
     
  9. Apr 5, 2011 #9 of 14
    orangeboy

    orangeboy yes, I AM orangeboy!

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    East Moline, IL
    According to kmttg, a one hour episode of Fringe is 6.74GB on disk, with the bitrate being 16.09mbps. That information relates to how the video is stored on the TiVo.
     
  10. atmuscarella

    atmuscarella Well-Known Member

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    Rochester NY
    All the networks are a little different. In my area Fox, ABC, CW, & ION broadcast a 720P signal, all the others (that I get) broadcast 1080i signals. The size of a a 1 hour prime time HD show will very from about 6.5GB to 7.8GB, depending on the channel.

    Thanks,
     
  11. lessd

    lessd Well-Known Member

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    Jan 23, 2005
    CT
    Is that from OTA or your cable system ?
     
  12. atmuscarella

    atmuscarella Well-Known Member

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    Rochester NY
    Sorry OTA - I am OTA only - live in a cable free zone :D

    Thanks,
     
  13. steve614

    steve614 what ru lookin at?

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    Dallas, TX
    Here's the stats for an OTA NBC show (SNL) as reported by VRD.
    (Dallas TX affiliate.)

    File Name: E:\Unedited TV\Saturday Night Live - ''Elton John; Leon Russell'' (Recorded Apr 2, 2011, CAST).TiVo
    File Size: 7616919707 ( 7.09 GB )
    Program Duration: 01:33:01.18
    File Type: TiVo
    Encoding: MPEG2
    Video stream Id: xE0
    Encoding Dimensions: 1920 x 1080
    Display Size: 1920 x 1080
    Aspect Ratio: 16:9
    Frame Rate: 29.97 FPS
    Bit Rate: 24.000 Mbps
    VBV_Buffer: 976 KB
    Profile: Main@High
    Progressive: Prog or Int
    Chroma: 4:2:0
    Audio Format: 5.1
    Audio Stream Id: AC3: 0 (x80)
    Audio Bit Rate: 384 Kbps
    Audio Sampling Rate: 48000 Hz
    TS Mux Rate (bps): -1
     
  14. moyekj

    moyekj Well-Known Member

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    Jan 23, 2006
    Mission...
    That's simply the header bit rate. The true bit rate you have info to calculate:
    (7.09*1000*8 Mbits)/(5580 secs)=10.16 Mbps (i.e. very lousy for 1080i HD mpeg2)
     

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