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  1. #1
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    Default how much channels on a frequency


    hi friends and experts please tell me how much channels transmit possible on a single frequincy

  2. #2
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    depends on SR and compression

  3. #3
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    Default hi

    dear hasnat please brief this sr and what technic use on this

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    in sr 27500 (20-30)
    in sr 30000 (25-33)
    up sr from 36000 (33-47)
    bye
    get it

  5. #5
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    Default Re: how much channels on a frequency


    Quote Originally Posted by geosaleem
    hi friends and experts please tell me how much channels transmit possible on a single frequincy
    here is a possible explanation:

    Number of Channels on each Transponder

    The number of channels which can be compressed onto each transponder depends on a lot of things such as desired image quality, degree of allowable visible artifacts, frame rate of the source material, amount of movement in the source material, and the amount of error correction overhead. The DBS companies compress several analog signals and combine the resulting picture and sound bitstreams with program guide data, conditional access data, and other digital overhead information necessary to reconstruct the original signals.

    Programming containing frames with many fast-moving small objects such as a basketball game can be compressed perhaps 7 or 8 to a transponder before significant digital artifacts appear. Programming containing mostly large still images can be compressed at a higher rate, perhaps 9 or 10 to a single transponder. Movies are filmed at 24 frames per second rather than 30 for video so they contain less source material. In addition, film is not interlaced and is in general fairly constant from frame to frame. As a result, film can be compressed more, perhaps 11 or 12 to a single transponder for today's quality. The actual bitrates used are not really known; the DBS companies keep the details of their use of compression to themselves for competitive reasons.
    so basing on this, you can gauge how many channels to expect per transponder, on average, you should get around 10-15 per transponder.
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