Comdate Pty Ltd have been appointed as Distributor in Australia. Established in 2003, Comdate supplies a wide range of Telecommunications and IT Test Equipment. Their test automation experience will be particularly useful in enabling our speech quality measurement systems to operate in conjunction with other equipments. www.comdate.com.au
The time alignment algorithm in POLQA was designed to be much better than that in PESQ. This example comes from a G.711 connection through an ATA in a test lab. There are no audible impairments but why is POLQA narrowband (NB) showing a score of 4.18 compared to the PESQ P.862.1 score of 3.58? Looking at our PESQ 2D view, it is …
50% of POLQA Sales made to Operators in the First Year. POLQA (ITU-T P.863) was published by the ITU in January 2011. We released one of the first commercial implementations of POLQA in August of the same year. The year that has passed since we released POLQA has certainly been a year of learning. In the first few months we discovered what …
Shanghai Commware Telecommunication Technology Co. Ltd have been appointed as Distributor in China. Commware is a professional telecommunication system development and test solution provider and was established in 2002. Their products include test systems for 3G and NGN as well as research and development laboratories. www.commware.com.cn
Understand how POLQA time aligns signals before analysing surface views. POLQA and PESQ align reference and degraded signals in time using rather different philosophies. Read more before you start analysing results in detail. If you’ve been using PESQ for years, you may be confused.
Expect reporting of small delay variations which are not actually there. POLQA has a sophisticated time-alignment algorithm to account for both step-delay changes and time-warping. Read this article to avoid being confused when POLQA reports small delay variations on a perfect network.
Ensure POLQA reference files pass the transparency test. Here we explain the hows and the whys of checking that your reference speech material is appropriate for POLQA testing. Read this article to avoid running hours of worthless testing because your reference speech files were not good enough.
Don’t use more than 10s of speech in narrowband mode. For long recordings of, say, 32 seconds POLQA can show a drop in score of around 1.1 compared to the average of four 8s measurements.
Many devices, including cellphones, now have mp3 players or similar music replay capabilities. Assessing the quality of the replay is important in product development, production and a factor in cellphone selection. Here’s how to do it with MultiDSLA.
Smartphone Control – A new option in MultiDSLA for managing mobile phone testing. The initial release supports Android; Blackberry, Windows and IOS support will follow. Automating mobile phone call set-up and teardown using the phone’s handsfree pushbutton and inbuilt facilities can be complicated. Smartphone Control simplifies the process and provides some useful data from the phone. Download an app from …