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- 01-10-2009, 04:03 PM #1valluGuest
Posting for a friend: there is a software that may be demanded by many
industries industries (telecom, mobile, VoIP,
etc). Here is the link to it:
In two words what it is all about and why I would like to ask you to
cooperate on promoting it.
Some years ago (something like 2005 if I heard it right) Samsung was
desperately searching for a possibility to quickly test their voice
quality on the fly. The so-called Cisco MOS estimations (you can read
them on the page) are quite expensive and make no sense during codec
development process, however, developers do need to get some
of the codec quality. This task is demanded by phone manufacturers
Samsung, Sony Ericsson etc for sure), telecom switch producers (Nokia,
Siemens, Alcatel...), Voice over IP software and hardware developers
(Skype and similar). Etc etc...
The company URL refers to is searching for partners to promote and
software product both as a desktop application as well as a DLL or
You can contact me or sa...@sevana.fi or Sevana CEO, Mr. Endre
c/o Ecotax AB
Phone: +358 9 23164165
Mobile: +372 53485178
Thank you for your time reading this message and I hope this will lead
good feedback as I sincerely believe that this utility is demanded.
P. S. Answers to frequently asked questions:
*1. Is the quality checker compatible with all kinds of codec? Is
test report that I can get? Will it also work for GSM, CDMA, VoIP and
*Answer1:* Answers to most of your questions are on the page:
"Further down one can find CISCO test results compared to our
audio codecs quality tests algorithms (ALG1, ALG2):"
and there is a comparisson table for 7 different codecs against MOS
Yes, one can test ANY codec:
"Are you interested in testing your own vocoder? It's no problem doing
even in the demo version of Sevana Vocoders Quality Checker! Please go
Tools -> Generate DLL Header, choose a desired file name and press OK.
Include the DLL header file into your project and provide two DLL
according to the DLL header file. Thus, by implementing your own
a DLL file you will be able to test its quality using our software."
2. *There has been a great deal of R&D in this area over the last 15
and there are established ITU-T standards that cover most of these
requirements. There are many benefits in using a standardised method
quality assessment: the performance of the method is well-understood,
have been developed through collaborative projects involving enormous
amounts of data, and so offer the greatest accuracy.
These standardised models are also available as easy-to-use
For more info please check out Psytechnics at http://www.psytechnics.com
who are leaders in this field - or take a look at ITU-T P.862 (PESQ) -
at http://en.wikipedia.org/wiki/PESQ . Methods are also available for
non-intrusive or no-reference measurement if you don't have access to
signal input to the codec - see for example ITU-T P.563. The ITU
can be found through http://www.itu.int/rec/T-REC-P/en
Many excellent papers, and a survey of the state of the art in this
were published in IEEE Transactions on Audio, Speech and Language
in November 2006:
Answer2: *ITU standards cover simulation on a test bed/harness and
although reduce costs are still relying on MOS.
Psytechnics Experience Manager is the so-called QoE and relies on real-
user input, and it is still based on MOS including operational
The product I posted about is different and covers a specific area,
product is integrated and BEFORE you get to the user experience.
I believe it perfectly suits those who develop vocoders, or who are
to choose or compare different codecs, or even audio files. I believe
can create a product similar to Experience Manager using the algoriths
the tool in question. *
› See More: Automatic voice codecs quality checker - partners search
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