HD Voice

HD Voice

Aymeric TIBURCE How-to, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeWhat 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 …

iphone voice quality testing

Testing iPhone Voice Quality with MultiDSLA

Aymeric TIBURCE How-to, Lab

LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeFor 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 …

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.