TrFO - Transcoder Free Operation

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In Early legacy telephone network, A call between the two mobiles involved with two transcoding function at both the end which decrease the voice quality. The Transcoding Function done by the TRAU (Transcoding and Rate Adaptation Unit) to compress and decompress the speech. 

Transcoder Free Operation (TrFO) is transport of compressed speech, which eliminates unnecessary coding and decoding of the signals when both end uses the same codecs. TrFO utilizes out of band signaling capabilities that include the ability to determine the negotiated codec type to be used at the two end nodes.  If the two end nodes are capable of the same codec operations, it may be possible to traverse the entire packet network using only the compressed speech (of the preferred codec). TrFO is basic function of codec Management. 

Following are the benefits of achieving the TrFO: 

1.) Improve the voice quality because of elimination of coding and decoding of suppressed codecs.
2.) We can optimize the resources by skipping the transcodes at both ends.
3.) We can increase the bandwidth in the Core Network.
4.) Increase the transmission delay by skipping the compression and decompression to G.711 codec.

It can improve the voice quality and above features using the TrFo and TFO simultaneously.

TrFO Operation

Comments

  1. UnknownApril 11, 2013 at 3:54 PM


    Your post have very good information about Voice Operations and Banking Outsourcing. Thanks for posting and keep further posting....!!

    ReplyDelete
  2. UnknownMay 31, 2013 at 11:53 AM

    Thanks for the reply.
    I would definitely post more once I get some time.

    ReplyDelete
  3. EpambaMarch 20, 2014 at 2:26 PM

    Nicely done.Thank you!

    ReplyDelete
  4. Arun JingarApril 29, 2014 at 11:18 AM

    This information was indeed useful to me.

    ReplyDelete
  5. UnknownJune 13, 2014 at 11:53 AM

    how does the compressed sound passes through msc?

    ReplyDelete
    Replies
    1. UnknownAugust 28, 2014 at 12:18 PM

      Sounds passes through the MGW only. MSC is only responsible for signaling.

      Delete

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