Smeared picture

Discussion in 'Free To Air (FTA) Discussion' started by VE2FCZ, Aug 6, 2018.

Thread Status:
Not open for further replies due to lack of activity. Consider opening a new thread instead.
  1. VE2FCZ

    VE2FCZ Topic Starter SatelliteGuys Family

    Joined:
    Feb 22, 2016
    Posts:
    41
    Likes Received:
    20
    Location:
    St Rémi Quebec Canada
    On G17 ku the 4 ABC mux are fine but when i blind scan the sat certain feeds look like smeared as if you wipe a rag over a freshley paint portrait (this is intermittent) using a Manhattan DJ 1997 HD. Any idea?thanks
     
    #1 VE2FCZ, Aug 6, 2018
    Last edited: Aug 6, 2018
  2. Titanium

    Titanium AI6US
    Lifetime Supporter

    Joined:
    May 23, 2013
    Posts:
    6,200
    Likes Received:
    6,231
    Location:
    Meadow Vista, Northern California
    Sounds like a decoding problem. Is the SIgnal Quality high? Does the SQ drop when the picture becomes blurry? Does the audio get chirps or garble?

    Do you have a different receiver to test?
     
  3. VE2FCZ

    VE2FCZ Topic Starter SatelliteGuys Family

    Joined:
    Feb 22, 2016
    Posts:
    41
    Likes Received:
    20
    Location:
    St Rémi Quebec Canada
    This is the only receiver i have.
    Sig 80+ Quality 65+ sound garble.
    Could it be the compression H264 this stb is not H 265.
    Also the modulation is swithing from 8PSK to QPSK.
    THANKS AGAIN.
     
  4. Titanium

    Titanium AI6US
    Lifetime Supporter

    Joined:
    May 23, 2013
    Posts:
    6,200
    Likes Received:
    6,231
    Location:
    Meadow Vista, Northern California
    What STB? What channels? Are the problematic services h.264 or h.265?

    Some STBs populate the modulation type after reading the transponder table when initially tuning the transponder. The previous transponder data may be displayed until overwritten.

    If the receiver is having a problem decoding, the modulation and other table data may not be properly read.
     
  5. harshness

    harshness SatelliteGuys Master

    Joined:
    May 5, 2007
    Posts:
    15,024
    Likes Received:
    2,026
    Location:
    Salem, OR
    h.265 shouldn't produce anything recognizable on a h.264 decoder. h.265 uses what are called Coding Tree Blocks where h.264 uses Macro Blocks. If the chipset supported h.265 but the firmware didn't, I'm not sure what you might get but it wouldn't be a blurry image. Smearing is something that pretty much has to happen after decoding as the data wouldn't be decodable if it were that corrupt. It would present as tiny corrupt blocks rather than an out-of-focus image. Compressed digital images either are good or they are fragged.

    That your modulation is switching back and forth is very odd as QPSK isn't enough like 8PSK that there should be confusion.

    It could be that the motion compensation technology is going ape for some reason and is working overtime to smooth out what it thinks is a very busy frame.
     
  6. VE2FCZ

    VE2FCZ Topic Starter SatelliteGuys Family

    Joined:
    Feb 22, 2016
    Posts:
    41
    Likes Received:
    20
    Location:
    St Rémi Quebec Canada
    Stb is Manhattan dj 1997 and only capable of H 264 as for channels it's never on the same tp and only 10% have this issue.
    I will buy another receiver, what should i buy?
     
  7. comfortably_numb

    comfortably_numb Dogs have owners, cats have staff
    Pub Member / Supporter

    Joined:
    Nov 30, 2011
    Posts:
    6,889
    Likes Received:
    6,900
    Location:
    Missouri/Kansas
    Amiko HD.265
     
    primestar31 and N0QBH like this.
  8. VE2FCZ

    VE2FCZ Topic Starter SatelliteGuys Family

    Joined:
    Feb 22, 2016
    Posts:
    41
    Likes Received:
    20
    Location:
    St Rémi Quebec Canada
    Thanks.
    Bob. VE2FCZ
     
  9. comfortably_numb

    comfortably_numb Dogs have owners, cats have staff
    Pub Member / Supporter

    Joined:
    Nov 30, 2011
    Posts:
    6,889
    Likes Received:
    6,900
    Location:
    Missouri/Kansas
    KE4EST currently has a lightly used one for sale, $60
     
    Titanium likes this.
Thread Status:
Not open for further replies due to lack of activity. Consider opening a new thread instead.

Separate names with a comma.

More...