Voice Quality


Voice Quality

As the telecommunication industry changes and new technologies and services are added – maintaining basic quality of voice services becomes increasingly complex. Voice quality is now an important differentiating factor for network operators. Measuring voice quality in a relatively inexpensive, reliable, and objective way becomes very important. NetScan offers such a solution.

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Real-time 24/7, continues network monitoring, processing and data analysis.

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VoTA and VoQA modules provides real-time and historic metrics for voice communication over various interfaces in mobile and VoIP networks.

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VoTA module estimates voice quality based on RTP protocol analysis.

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VoQA module measure voice quality based on decoded voice advanced waveform analysis.


System Architecture

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NetScan passively intercept data (signalling & UP) from monitored network and process at NetScan Probes.

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All probes are fully autonomous and continue data processing even with no contact with other system components (central server, other probes).


Voice Quality Analysis

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Voice quality analysis requires parallel processing of CP and UP.

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Voice quality can be analysed based on transport layer analysis or directly on decoded voice processing.

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Voice quality metrics are correlated with call-record and aggregated per node, group of nodes, destination etc.


VoTA Transport Layer Analysis

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Voice quality analysis based on assumption that transport network is the primary source for voice quality distortions.

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Quality estimated based on transport protocol (RTP) analysis.

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Method specified in ITU-T G.107 and later with G.107-1 (for wideband codecs).


VoQA Voice Waveform Processing

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Quality scoring based directly on decoded voice analysis.

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Estimates true quality of voice communication as per ITU-T recommendation P.563.

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Embeded unique quality estimation algorithm PVQA provided by SEVANA.

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All major voice codecs are supported G.711, G.722, G.723.1, G.726, G.729, GSM FR, GSM HR, AMR NB, AMR WB, iLBC , Speex.


Do you want to know more?

Download VQA brochure

Head Office

Wołodyjowskiego 46b
02-724 Warszawa
POLAND

Contact Details

+48 22 424 70 01
netscan@netscan.pl