LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeSelecting Reference Speech Files In this third episode of “Do you really know everything about MOS” video series, we explain how to select correct reference speech files for POLQA and PESQ voice quality tests. You will also learn how to verify the ITU compliance of the reference speech files you are actually …
Voice Quality Assessment for VoLTE Devices
LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeVoLTE device manufacturers’ challenge Modem chipset designers and cellular device manufacturers need to characterize the performance of their products. Not just under ‘ideal’ network conditions, but also in the ‘real world’ of packet loss and jitter. The RTP packet stream from the network to the VoLTE device may be subject to impairments …
POLQA & PESQ – Know everything about MOS – Part 2
LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypePOLQA or PESQ? In this second episode of “Do you really know everything about MOS?” video series, we explore in more details ITU PESQ and POLQA MOS algorithms and related test methodologies. You will learn what are the limitations for each algorithm, and when to choose PESQ or POLQA (ITU P.863) depending …
Know everything about MOS – Part 1
Wait… which MOS, exactly ?
LinkedIn Twitter Facebook Google+ Weibo VKontakte Viadeo Flipboard SkypeAbout this video: MOS has become a common requirement in device and network testing, but the origin and meaning of MOS can be obscured and confused. In this 4 min first video, we begin with a discussion of three key aspects of voice quality measurement : Mean Opinion Score, POLQA & PESQ …
POLQA v2.4 – Notes on the Upgrade’s Behaviours (Part 2)
The second article in a series looking at the new version of ITU-T Rec. P.863 POLQA. Speaker dependency in the Narrowband Model is the focus here.
A look at Skype VoLTE (Voice over LTE)
Aspects of Skype performance between two LTE phones on the network, over WiFi and between WiFi and the network
POLQA v2.4 – Notes on the Upgrade’s Behaviours (Part 1)
A new version of ITU-T Rec. P.863 POLQA is now included in MultiDSLA. Discover what has changed in v2.4.
Bluetooth Link Testing with a MultiDSLA System
A MultiDSLA system can evaluate the speech quality transmission performance of a mobile phone with a Bluetooth link.
Step Change a Test Parameter with MultiDSLA v5
Making measurements of the effects of step changes in parameters is much easier in MultiDSLA version 5.
Test Push-to-Talk (PTT Test) and PTT over Cellular
Testing Push-to-Talk (PTT) and PPT over Cellular (PoC) parameters is straightforward with MultiDSLA.