Where can i find the bitrates for digital channels.

Discussion in 'Satellite TV, Sky TV & FreeSat' started by Timh, Oct 22, 2002.

  1. Timh

    Timh
    Well-known Member

    Joined:
    Sep 14, 2000
    Messages:
    4,819
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Altair-4
    Ratings:
    +140
    Where can i find the bitrates (Mega Bite's) for digital channels. I was just wondering what the individual channels bitrate are, for instance BBC1 on freeview compared to BBC1 on Sky.

    Cheer's
     
  2. jim.rae

    jim.rae
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    You need a special bit of kit to check out this kind of info.

    Some PC TV cards can give this kind of information, but it's not easy with domestic equipment..
     
  3. Timh

    Timh
    Well-known Member

    Joined:
    Sep 14, 2000
    Messages:
    4,819
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    86
    Location:
    Altair-4
    Ratings:
    +140
    Thanks jim. Surely there must be a site somewhere telling you all the technical side to digital TV.
     
  4. Starburst

    Starburst
    Well-known Member

    Joined:
    Jul 13, 2000
    Messages:
    17,838
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Ilkeston
    Ratings:
    +979
    There is the DVB specifications but mpegII encoding can literally be set at any bitrate which would be dependent upon how much each individual channel wishes to pay for transponder capacity (Satellite) and how what other services they wanted to offer on DTT.

    You've also got to consider that many broadcasters use statistical multiplexing which takes a handful of channels and shares the available bandwidth between them so there is no "set" bitrate.

    DVB

    This thread also covers DTT bitrates.....DS - DTT
     
  5. Chris Muriel

    Chris Muriel
    Well-known Member

    Joined:
    Jun 14, 2002
    Messages:
    7,108
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    Manchester
    Ratings:
    +713
    The bit-rate is variable as almost all channels and multiplexes use statistical muxing.
    If you want some averages, I have a "special" satellite TV card & PC s/ware that reads the raw MPEG TS (Transport Stream) ; I can tune to a transponder and see the instantaneous individual data-rates for every channel in a multiplex along with all other PSI info (program specific information).
    The software is specific to the Twinhan VP-1020 PCI satellite cards and is not in the public domain (written by a British friend of mine who now lives in the USA).
    You would have to tell me the actual frequencies of the transponders containing the channels you want me to check (not the channel number that you use for the $ky digibox).
    They should be listed on Lyngsat (www.lyngsat.com).

    Chris Muriel, Manchester - author of Digital SDatellite FAQ.
     

Share This Page

Loading...