Messenger-to-messenger testing. How to test messenger-to-messenger voice and video calls?

This is how you can learn about your customers experience during the audio / video calls and find thin points and bottle necks in your service.

No call recordings, no privacy violation, but full details on the user quality of experience: low types of MOS scores (QoS and QoE), reasons for call quality degradation, pinpoints at the parts of the call audio where the quality had issues.

We promise easy and flexible integration into your messenger.

 

Do you have a hardware solution that records RTP call traffic in real-time? Enable QoE analysis to real-time RTP recording.

Are you happy with the E-Model quality scoring? Try out our user experience metrics. This will give you a competitive advantage and won’t take much effort for integration. Matching network conditions (E-Model, packet loss etc) with user experience (our analysis is based on actual call audio) will give you full picture on your network and user quality of experience (QoE).

Call center agents quality monitoring: do you have a call center that records customer calls and your agents complain about call quality?

Figuring out call quality issues, problematic routes might be much easier with Sevana PVQA technology.
Setting up massive call recording analysis is a matter of a couple of minutes. In return one receives audio quality score (MOS) and report on audio impairments that influenced the call quality.
By the end of the analysis, you will have full picture on the calls that had most of the problems in quality and potential reasons for them. Interested in receiving this information in real-time? This just simple with PVQA technology implemented for real-time traffic analysis. Contact us for more information.

How to setup real-time RTP monitoring?

One can easily setup real-time RTP monitoring using Sevana PVQA Server to receive information on calls with QoS (packet loss, jitter etc) and QoE (noise, dead air, echo etc) issues.

Unlikely other systems PVQA Server provides two quality metrics represented as two MOS scores: E-Model based MOS and PVQA MOS derived from call audio analysis.

With detailed statistics one can even figure out at what time of the call noise, echo, clipping or e.g. clicking took place.

Real-time alerting will immediately notify about quality issues of the monitored traffic. Book a demo here.

Mobile-to-mobile test and monitoring

Would you like to setup mobile-to-mobile test call or monitor end-to-end call quality on a set of mobile phones?
Sevana QualTest is the solution that lets you establish this within one business day and receive full details on the quality score (MOS) and audio issues that have potentially degraded the call quality.
Analysis is performed directly on the phone, or one can have multiple phones connected to an USB port to make simultaneous tests.
All test results are aggregated directly at the backend of your choice.This can be Sevana QualTest backend or your existing monitoring solution.
Another option is to use one of easy integrations of QualTest, which our clients prefer most.

Contact us for more details.

QualTest – Mobile Test Probe

Sevana QualTest mobile test probe is an application that checks current network conditions and estimates voice quality in mobile and VoIP networks. If your goal is to set up end-to-end or single-ended automated tests, receive test results at any backend of your choice, manage tests and watch test results and reporting at a friendly GUI, then QualTest is a good fit.

Keep an eye on call quality with sevana.biz

Sevana Digital Signal Processing for Telecommunications

What is Sevana offering?

We offer knowledge and experience of our scientists and developers to solve complex software tasks in telecom, digital signal processing and other areas that require the unique skills we have.⠀

We are experts in:⠀
•⠀Audio processing and Digital Signal Processing⠀
• VoIP and SIP client and server systems development⠀
•⠀High performance network programming and real-time systems
•⠀System architecture design⠀
•⠀Complex algorithms design and development⠀

Working with us means:⠀
•⠀Access to experts with 20+ years of experience⠀
•⠀Access to Sevana knowledge base⠀
•⠀Access to Sevana base of libraries and algorithms⠀
•⠀Professional management⠀
•⠀Reliable SDLC⠀
Contact us for more details on Sevana Digital Signal Processing for Telecommunications

sevana-is-sharing-source-code
C++ wrapper for libevent library

Sevana is sharing with open source community its tiny C++ wrapper for libevent library under MIT license. This helps us  to quickly build HTTP clients and servers reducing development costs due to API simplicity and integration. We actively use it in our products to provide high performance HTTP processing.

Visit repository

Call quality issues maintenance prior your cusotmers complain

Do you want to know about call quality issues prior your customers start complaining?

Sevana libraries collect all the QoS and QoE data of the calls in real-time, providing immediate alerting on changes that affect callers’ perception, and discover and store reasons for call audio degradation. Map audio impairments on network metrics and discover QoE and QoS patterns, specific to certain routes, destinations, originations, or parts of the traffic.

Every call, analyzed by the system, creates big data that one can study, using data analysis tools, to predict network behavior and call quality.

End-to-end audio quality testing: is there a simple but powerful tool for end-to-end audio quality testing and file comparison?

Meet Sevana AQuA – Audio Quality Analyzer 🔉
It is a simple but powerful tool to provide perceptual voice quality testing and audio file quality comparison.
The human ear is a non-linear system, which produces an effect named masking. Masking occurs on hearing a message against a noisy background or masking sounds.
AQuA perceptual model is based on research of four different scientists who discovered influence of different frequency bands (the so-called critical bands) to human perception.
The value of spectrum energy in frequency bands can be used for different purposes; one of which is the sound signal quality estimation.
However, using only critical bands discovered by one scientist does not allow getting an estimation objective enough, since they show only one of the aspects of perception or speech production.
AQuA can determine energy in various critical bands as well as in logarithmic and resonator bands, that allows taking into account more properties of hearing and speech processing.
We know three tools of this kind available on the market: POLQA, ViSQOL, AQuA. Please contact us if you know other tools or like to evaluate Sevana AQuA.