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  1. #1
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    Thumbs up Press release:Sevana Audio Quality Analyzer(AQuA)2.1 - means to test HD Voice quality

    HELSINKI, Finland - June 25, 2009 - Sevana Oy today announces the immediate availability of Sevana Audio Quality Analyzer (AQuA) 2.1, a new tool that enables automated audio quality testing. AQuA is based on proprietary algorithms featuring a unique opportunity to provide sound signals quality testing of voice, HD Voice and other sound signals of various bitrates and sampling frequencies. AQuA is one of the easiest and fastest ways to measure voice and sound signals quality.

    Typically, voice and music quality is measured according to the Mean Opinion Score (MOS) or ITU, which provide a numerical indication of the perceived quality of received media after degradation. The MOS is expressed as a single number in the range 1 to 5, where 1 is lowest perceived quality, and 5 is the highest perceived quality. In a similar manner PESQ and PEAQ provide values of voice and music quality. Obtaining MOS estimations is time-consuming and expensive as it requires hiring experts to make estimations. Further more, HD Voice is a rapidly growing development, however, many existing test methodologies including PESQ, PAMS, PSQM are more suitable to work with lower bandwidth audio and not with HD Voice.

    Sevana Audio Quality Analyzer is designed for obtaining precise testing and analytics for HD Voice and varied sampling frequencies and bandwidth products. AQuA provides voice quality measurement and testing for different sound signal formats:

    16bit@8kHz, mono - AQuA voice quality testing

    16bit@16kHz, mono and stereo - AQuA HD Voice quality testing

    16bit@44kHz, mono and stereo - AQuA wideband audio signals quality testing

    Test results are presented as percentage of similarity to the original audio in terms of quality, and/or MOS value, and/or PESQ value. Besides that AQuA gives extensive report on reasons for audio quality loss.

    The mechanism of testing and measurement of sound signals quality requests the original and degraded audio for comparison. Original and decoded signals are compared using an internal audio signal comparison function, and a signal similarity coefficient is displayed. 100% corresponds to identical signals. Fully functional demo versions for testing voice, HD Voice and music files are available.

    On request, Sevana engineers can provide custom editions of the product tailored specifically to the needs and software projects of the customer as well as software versions for Linux systems.

    Sevana Audio Quality Analyzer 2.1 is available today.

    About Sevana Oy

    The company was founded in 2003 and specializes in the production of affordable software with competitive features, as well as providing outsourcing services. So far the company has developed solutions for data mining, speech processing and business processes automation for SMEs. For more information, please visit http://www.sevana.fi.
    ###

    NOTE TO EDITORS: For additional information visit http://www.sevana.fi or call +358 9 23164165.

    Product page: http://www.sevana.fi/voice_quality_t...t_analysis.php
    Download link: http://www.sevana.fi/aqua-hdv.zip
    Company website: http://www.sevana.fi
    E-mail: ceo@sevana.fi

    Postal address:
    Sevana Oy
    c/o Ecotax AB
    Agricolankatu 11
    00530 Helsinki
    Finland

    Phone: +358 9 23164165
    Mobile: +372 53485178

  2. #2
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    Jan 2009
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    17

    Lightbulb HD Voice quality testing - evaluation inquiry

    Hi,

    HD Voice is a rapidly growing development in VoIP also due to heavyweights industries pushing this giving this technology a kickstart.

    Many existing test methodologies including PESQ, PAMS, PSQM are designed to work with lower bandwidth audio and cannot be applied for HD Voice.

    The software I am inquiring to evaluate is an answer for obtaining precise testing and analytics for HD Voice products. The software provides voice quality measurement and testing for different sound signal formats:

    16bit@8kHz, mono - AQuA voice quality testing

    16bit@16kHz, mono and stereo - AQuA HD Voice quality testing

    16bit@44kHz, mono and stereo - AQuA wideband audio signals quality testing

    Test results are presented as percentage of similarity to the original audio in terms of quality, and/or MOS value, and/or PESQ value. Besides that AQuA gives extensive report on reasons for audio quality loss.

    If voice, HD Voice and wideband audio quality testing is of your interest please consider this page:

    http://www.sevana.fi/voice_quality_t...t_analysis.php

    Any feedback is highly appreciated! Thanks!

  3. #3
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    Jan 2009
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    17

    Thumbs up Turn your Nokia N82 into a voice quality testing device!

    Hi!

    Great news about use of AQuA software - now you can easily test voice quality in your or any other mobile network just by using your Nokia N82 mobile phone and Sevana AQuA software. Here is how you can do it.

    First of all do you know that you can record phone calls you make with your Nokia N82 phone? During a phone call just hit Menu on your keypad, select Applications > Media > Recorder. Select Options > Record Sound Clip to record your current phone call. Now you have an audio file for the so called non-intrusive voice quality testing. However, AQuA is the means to do intrusive voice quality testing and therefore we need a reference audio file. There are a couple of simple ways to test voice quality in your mobile network:

    1. If your operator allows uploading a greeting audio file into your voice mailbox then you just need another phone or SIM card:

    Step 1: Upload a reference audio (you can also use the speech model audio file provided with AQuA for most accurate voice quality testing or just any audio) to your mobile operator facilities as your voice mailbox greeting message and set your connection to forward all calls to your voice mail when your phone is unreachable or turned off. Now switch your phone off - you have just created an answering machine to test voice quality of your mobile network!

    Step 2: Use another SIM card of the same or other mobile network (depending whether you like to test voice quality in your mobile network or the quality of a voice call from one mobile network to another), insert it in your phone and dial the phone number of the SIM card you used to store audio to your voice mailbox.

    Step 3: Your call will be forwarded to your voice mailbox and you will hear the greeting message you uploaded. Record the call as described above, transfer the audio file to your computer and use AQuA to test the original file quality against the recorded one and you will receive objective estimation in percentage of quality, Mean Opinion Score (MOS) and PESQ-like values.

    2. You can use an ordinary answering machine (the best digital, so you can upload digital recording into it) in the same manner and plug it into a phone socket of a fixed line. This way you will test voice quality between your mobile operator and fixed line (PSTN) provider.

    3. You can use a mobile modem with voice feature enabled (to create a mobile answering machine) and make phone calls from your N82 to it thus testing voice quality between two mobile devices.

    Do you have a virtual number and like to test voice quaity between your moblie network and virtual number provider? just set it to forward calls to voice mail and make sure that the greeting message is the same as your reference audio.

    Special issue of this post:

    - you don’t have to buy AQuA for doing these tests, just contact us and we’ll do testing ourselves providing you with CSV or XML file with the test results

    Good luck with your tests!

    Original post: http://wordpress.sevana.fi/turn-your...esting-device/
    AQuA Software link: http://www.sevana.fi/voice_quality_t...t_analysis.php

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