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Picture quality upgrade!!

Discussion in 'DISH™ OTA Support and Discussion Forum' started by NCwolfpack00, Aug 14, 2013.

  1. NCwolfpack00

    NCwolfpack00 New Member

    34
    0
    Jul 27, 2013
    NC
    I just installed the OTA Module for my hopper. I love it. I just completed a test. I recorded the same 1 hr show on the hopper at the same time. I recorded it on my local station. The station OTA signal and the Dish Locals delivered by dish satellites. The Dish local station file size on the hopper was 2.468GB. The same 1 hr show had a file size of 5.475GB when recorded using OTA module. This demonstrates the amount of picture quality info that Dish loses when transmitting over the sats. I thought this was interesting. I wish Dish could transmit all stations at full original bandwidth.


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  2. am7crew

    am7crew Legend

    273
    1
    Jun 5, 2009
    Its pretty common knowledge OTA are better quality as they are not compressed at all. Dish and all other providers have to compress the broadcast for bandwidth reasons as you seem to already know.
     
    1 person likes this.
  3. Stewart Vernon

    Stewart Vernon Doctor Whom Staff Member Super Moderator DBSTalk Club

    21,470
    359
    Jan 7, 2005
    Kittrell, NC
    To be fair... That is a misleading comparison somewhat.

    The SAT-delivered locals are MPEG4, while OTA is MPEG2... so IF all other things are equal, one would expect a substantially larger file size from OTA on that basis alone.

    I do agree with you, though, that usually the OTA signal is also less compressed... but that file size comparison alone can be misleading on just what the difference is.
     
  4. Stewart Vernon

    Stewart Vernon Doctor Whom Staff Member Super Moderator DBSTalk Club

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    Jan 7, 2005
    Kittrell, NC
    OTA is compressed too. Nobody has the bandwidth to transmit raw/uncompressed HD video signals...
     
    1 person likes this.
  5. Michael P

    Michael P Hall Of Fame

    3,071
    13
    Oct 27, 2004
    The PQ difference between Dish and OTA were more apparent to my eyes back in the SD days. The SD versions of local stations on satellite were terrible! One time I watched a football game that was played in a snowstorm. The falling snow caused the wide shots to be a pixellated mess.
     
  6. Vulpine

    Vulpine New Member

    3
    0
    Sep 1, 2013
    Chicagoland, IL
    Hi, new to the forum, and I've only been lurking for a short time.

    The concern I have with the OTA module would be that it compresses the signal (especially through the USB connection). I'm guessing from above that there isn't any compression, but I want to be sure.

    Thanks!
     
  7. thomasjk

    thomasjk Legend

    504
    13
    Jan 10, 2006
    I can't say if there is any compression but OTA picture quality is excellent.
     
  8. Stewart Vernon

    Stewart Vernon Doctor Whom Staff Member Super Moderator DBSTalk Club

    21,470
    359
    Jan 7, 2005
    Kittrell, NC
    I can't swear it... but all the OTA module should be doing is receiving the OTA transmission and delivering it as-is to the receiver.

    Since all of these Dish receivers either have an internal OTA tuner OR an OTA module that you install to a proprietary port OR use a USB 2.0 interface (Hopper)... I see no need for the module itself to do anything to the signal in order to deliver it to the receiver.
     
  9. Jim5506

    Jim5506 Hall Of Fame

    3,635
    32
    Jun 7, 2004
    The data path width for SATA 2.0 is more than adequate to handle the 18GB ATSC channel bandwidth, no compression needed for a usb connection.

    OTA signal is already compressed by the network/station/originator, saying OTA is not compressed is patently untrue, because it is transmitted with MPEG2 compression.

    The HD signal originally is a tremendous amount of data.

    For each pixel there are many data points and each frame on the screen has 2,000,000 pixels, 30 of these frames being transmitted every second.

    MPEG2 compression packs this data into less than an 18gigabit/second signal.
     

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