Olivier WILLI Know everything about MOS – Part 1 Wait… which MOS, exactly ? Voice quality measurement 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-minute video, we begin a discussi...
Olivier WILLI Product Qualification for Bluetooth Audio Streaming Product qualification for local audio streaming has become more critical than ever Under ideal conditions, the streaming process has no effect on the music or voice listening experience, which is gove...
Olivier WILLI Malden has a new home, Opale Systems Malden becomes Opales Systems, but theSpeech Quality Assessment products MultiDSLA and MetricServer don't change After 20 years deliveringthe best-performing speech quality measurement systems to netw...
Olivier WILLI Wideband or Narrowband? Phone services have seen an extension of the upper limit of audio frequency from the traditional 3.4kHz of PSTN to 7.5kHz for wideband. VoLTE and 4G services using AMR can be wideband. OTT or desktop ...
Olivier WILLI Extending the Field Test Programme Indoors A c onsistent GPS signal is vital to successful Field Tests. Malden’sTime Sync Managementtechniques minimise the effects of any GPS signal loss by ensuring that DSLA units maintain sufficient time syn...
Olivier WILLI Upgrading to Windows 10 Affects Softkeys Softkey and Dongle Key Management for MultiDSLA and Opale Systems Applications on Windows 10 Pro MultiDSLA and other Opale Systems applications can be installed and will run under Windows 10 Pro using...
Olivier WILLI Measuring Speech Quality across Mixed Networks Users of VoLTE phones expect wideband speech. Of course, if the other end of the call is PSTN, 2G or 3Gnarrowband then their experience will not meet expectations. The planned or unexpected tendency f...
Olivier WILLI POLQA v2.4 – Notes on the Upgrade’s Behaviours (Part 2) Comparing Performance Differences between ITU-T Rec. P.863 v2.4 and v1.1 for Speech Quality Metrics ITU-T Rec. P.863 v2.4 works rather differently from v1.1. Many aspects of the algorithm have been mo...
Olivier WILLI Tek Signals Appointed as Distributor in UAE New partner for Opale Systems : Tek Signals Opale Systems (formerly Malden) is delighted to announce its partnership with Teck Signals. We are pleased to announce that Tek Signals has agreed to distri...
Olivier WILLI A look at Skype VoLTE (Voice over LTE) How Skype maintains speech continuity? There is much talk about LTE and OTT apps. Skype is one such app and we made some measurements using two iPhones connected to LTE and WiFi. Speech signals were a...
Olivier WILLI POLQA v2.4 – Notes on the Upgrade’s Behaviours (Part 1) Introducing POLQA v2.4 in MultiDSLA v5.1.2: Bug Fixes and Improvements A new version of ITU-T Rec. P.863 POLQA is included inMultiDSLA v5.1.2 onwards. It contains some bug fixes and improvements. The ...
Olivier WILLI Bluetooth Link Testing with a MultiDSLA System The Problem: automated speech quality test system A customer required an automated speech quality test system, including a Bluetooth link between a wireless device under test and a controllable refere...
