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> Voice Quality Measures
(optionally available for the software-only and all hardware configurations)
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PESQ, the new industry standard for perceptual voice quality testing according to ITU-T rec. P.862 [2001], combines PSQM with PAMS, optimized for VoIP and hybrid end-to-end applications, MOS and MOS-LQ calculations |
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click to [ enlarge picture ]
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click to [ enlarge picture ]
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PSQM/IP, perceptual speech quality measure based on ITU-T rec. P.861 [1996] and PSQM+, incl. advanced delay compensation for end-to-end measurements, developed by OPTICOM |
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PSQM+, advanced perceptual speech quality measure according to ITU-T COM 12-20 [1998] |
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Echo measurement based on real voice signals, developed by OPTICOM, measures Echo Return Loss ERLpeak, ERL vs. delay |
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E-Model Transmission Rating Factor R according to ITU-T G.107, derived from PESQ [available with PESQ only]
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| > Competitive Strength for future Standards |
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Due to OPERA's flexible design, user defined algorithms and advances in measurement standards can easily be provided as software plug-ins, ensuring OPTICOM's very competitive and short time-to-market.
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| > Common Features for Voice Quality Analysis |
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One way delay measurement, with PESQ also delay jitter vs. time and delay distribution |
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Measurement under double talk conditions |
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One way and two way measurements |
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Bulk call generation to stress the device/network under test |
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VAD analysis, Front-end clipping FEC, hold-over time HOT
and and dropout measurement (e.g. for packet loss analysis, burst error concealment) [available with PESQ only] |
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Background noise measurement |
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Signal-to-noise SNR measurement of speech and silent parts of a test signal |
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Multi-lingual voice reference stimuli available, incl. male and female speakers
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| > Telecom Applications and Features |
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True end-to-end voice quality testing of current and next generation networks, such as VoIP, VoDSL, VoATM, ISDN, GSM, POTS, based on real world voice signals |
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Analyze Speech Codecs, VAD behaviour, echo cancellers and signal enhancers with any voice signal |
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Include the acoustical path of handsets and mobile phones in the analysis using OPERA™ with an optional head and torso simulator (HATS) [OPERA software update available Q1/2003] |
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Monitor the QoS of any corporate, public or long distance network (surveillance) |
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Stress your network in order to observe the effects on the
transmission quality (bulk call generation) |
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| > Specific Telecom Features |
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Plenty of detailed views and graphs provided for further fault analysis, incl. voice or wide band audio quality, time signals, spectra, echo, delay, jitter, VAD behaviour and call timing |
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Interactive or automated unattended measurements |
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Immediate overview of the QoS of your network based on standardized metrics |
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Remote control a single or numerous OPERA™ analyzers via an IP connection. Share a pool of OPERA™ systems in your test lab with other developers. Conveniently control the pool from your office PC |
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Freely combine various interface types in every measure-ment (e.g. VoIP calls from POTS to a VoIP terminal) |
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| > Downloads |
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| > More details |
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For more details on the technology of Voice Quality Testing refer to our Technology section |
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