[asterisk-users] voice quality measurement using dahdi_monitor

[Sevana Oy]

Hi,

The question is can you record the audio to evaluate its quality? There is intrusive approach when you have a reference file that you can test against the recorded audio, or non-intrusive approach, which allows you evaluate voice quality of any call recording (no reference needed). Both correspond to ITU-T standards: P.862 for intrusive and P.563 for non-intrusive, or to Sevana AQuA (for intrusive) and Sevana NIQA (for non-intrusive).

The difference is that all ITU-T recommendations related to voice quality measurement are quite expensive and involve annual royalties, but they are recognized standards. Sevana products are not recognized standards, but are used by many happy customers doing call quality assessment in VoIP, PSTN and mobile networks.

Welcome to our web site: http://www.sevana.fi for further information and customer references (many are Asterisk owners) or just contact us directly.

Best Regards,
Sevana Oy
Finland
  ----- Original Message ----- 
  From: DHAVAL INDRODIYA 
  To: Asterisk Users Mailing List - Non-Commercial Discussion 
  Sent: Friday, February 04, 2011 12:53 PM
  Subject: [asterisk-users] voice quality measurement using dahdi_monitor


  hi group ,

  i am working on dahdi_monitor for measuring voice quality , so i want to know that on which data i can tell that this PRI
  lines are working properly, is there any measurement on basis of that i can make MOS. i am working from last 2-3 days 
  but i only get idea about making .raw file and making .wav file and visulal mode of RX and TX of PRI line.

  what i want is measurement of voice quality so that i can talk with provider that i am getting % of voice quality.i am sure there is 
  some better way to solve or debug .raw file and taking a decision.


  let me help please to solve and finding problem of voice quality.


  regards
  Dhaval



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