HD Voice

HD Voice

Aymeric TIBURCE How-to, Lab

What is HD Voice? HD Voice is short for High-Definition Voice, and is also called Wideband.  In Internet and mobile telephony, it refers to the use of Wideband technology to provide a deeper clarity and better audio experience during a telephone call.  The higher frequencies transmitted in Wideband make for easier recognition of un-voiced sounds such as “ss” “f” “sh”. …

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Testing iPhone Voice Quality with MultiDSLA

Aymeric TIBURCE How-to, Lab

For about a year, you have been able to automate Android smartphone voice-band performance testing with our custom app. This app is installed on the Android phone. Once installed, MultiDSLA software can make the phone place and answer phone calls automatically. Now we have an app developed for the iPhone. Note: we assume that you have an understanding of how …

Comdate appointed as Distributor in Australia

Aymeric TIBURCE Company News

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

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POLQA Gets the Timing Right

Aymeric TIBURCE In More Depth

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 …

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Who uses POLQA (P.863)?

Aymeric TIBURCE In More Depth

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 …

Commware appointed as Distributor in China

Aymeric TIBURCE Company News

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

POLQA – Notes on Odd Behaviours (Part 4)

Aymeric TIBURCE How-to, In More Depth, Lab

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.

POLQA – Notes on Odd Behaviours (Part 3)

Aymeric TIBURCE How-to, In More Depth, Lab

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.