Teraquant has been Malden’s partner in the USA and Canada since 2005. Bringing 23 years of experience in speech quality assessment, we work closely with our many customers to ensure that Malden’s accuracy and excellence is made available to your wide range of voice and audio test needs.
Malden Electronics Ltd is now rebranded under Opale Systems.
The MultiDSLA makes speech quality measurements according to PESQ (ITU-T Rec. P.862) and POLQA (ITU-T Rec. P.863) standards, and music according to the ITU-R PEAQ standard. In addition, a comprehensive range of audio measurements such as level; DTMF; audio delay and echo are provided. Most leading speech technology companies rely on Malden as the only system to make accurate measurements of PESQ and POLQA, including all the major network operators and equipment developers around the world. Opale Systems commitment to innovation extends to their participation in the ITU-T, contributing to advances in performance analysis techniques for the whole telecommunications community.
Malden Electronics produces the most accurate measurement and most comprehensive implementation objective voice quality assessment of PESQ (ITU-T Recommendation P.862 and ITU-T Recommendation P.863 POLQA®) available in the world today. They also provice the most accurate measurement of one way delay for the voice path available in the world today.
Malden the first to launch POLQA standard on MultiDSLA speech quality tool in 2011.
Malden supports POLQA, the newest standard for evaluating speech quality (ITU-T Rec. P.863); available on their MultiDSLA speech performance analysis tool.
Still providing PESQ scoring, the MultiDSLA can now include support for the ITU-T Rec. P.863 POLQA algorithm which has been developed to deal with some of the weaknesses inherent in PESQ.
You should consider testing with POLQA if you:
- Are using either wideband or super-Wideband codecs. (7kHz to 24kHz analog bandwidth) sometimes known as High Definition audio.
- Use codecs that employ time-warping.
- Work with CDMA terminals and/or networks.
- Have a network that uses AMR codecs.
- Test through acoustic interfaces.
- Are concerned about voice quality enhancement and noise reduction devices/processes.
The principle is similar to PESQ - comparing the clean reference file with the degraded file from the network - but the test methodology is different. POLQA has two models, one for Narrowband and one for Super-Wideband. The Super-Wideband model can be used for any network. The Narrowband model provided compatibility with PESQ NB and narrowband subjective test data.
MultiDSLA makes it easy to use POLQA. Malden’s long experience in the application of speech quality metrics ensures that you will be getting useful results as soon as the option is enabled on your MultiDSLA system.
If you want to know more about POLQA and how it is implemented on the MultiDSLA, or to find out how you could be using POLQA on your MultiDSLA within days, call us at
Why is Accuracy Important?
- Accuracy avoids the cost of chasing and repairing a problem which has no impact on quality or user experience.
- Accuracy allows you to pin-point the real cause of bottlenecks in your system.
- Accuracy prevents you from failing a good product.
- Voice Codec performance.
- Compare different algorithms and implementations.
- Bandwidth required to achieve a given level of voice quality.
- Packet Loss Concealment mechanisms.
- Determine capacity of devices such as gateways sharing DSP resources between voice streams.
Network Test and Monitoring
- Isolate network elements contributing to poor voice quality.
- Baseline current voice quality to set realistic goals for VoIP migration.
- Monitor voice SLA’s.
- Provide objective acceptance criteria.
- Eliminate good networks from bad networks.
Devices to be Tested
- Handsets and Mobiles for cellular, WiFi and VoIP.
- VoIP gateways.
- Any device with a voice codec (eg: VoIP endpoint or transcoder).
You might also want to check our whitepaper A Practical Guide to Troubleshooting Poor Speech Quality – End-to-End.