User manual OPTICOM PESQ DATASHEET 05-11-14
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OPTICOM PESQ DATASHEET 08-03-13 (224 ko)
Manual abstract: user guide OPTICOM PESQDATASHEET 05-11-14
Detailed instructions for use are in the User's Guide.
[. . . ] PESQ Perceptual Evaluation of Speech Quality
OPTICOM's PESQ (Perceptual Evaluation of Speech Quality) provides accurate and repeatable estimates of speech quality degradation occurring through e. g. [. . . ] The audible differences are accumulated over time while they are weighted differently depending on whether a distortion was added to the signal or if parts of the signal were missing after the transmission (cognitive model). Finally after the analysis a single Mean Opinion Score (MOS) is generated. The MOS is commonly used to describe the voice quality on a scale from 1 (bad quality) to 5 (excellent quality).
Key Features:
· Perceptual analysis of degradations in voice signals · Well established, repeatable results · Output score correlates very well with subjective MOS · Automatic time alignment capability · Available as DLL/Library and Source
Reference signal Level align System under test Level align Input filter Input filter Time align and equalise Auditory transform Disturbance processing Auditory transform Re-align bad intervals Cognitive modelling Identify bad intervals Prediction of perceived speech quality
Degraded signal
PEVQTM, 3SQMTM and the OPTICOM logo are registered trademarks of OPTICOM GmbH; the `single-sided speech quality measure' and `the perceptual quality experts' are trademarks of OPTICOM GmbH. All brand and product names are trademarks and/or registered trademarks of their respective owners. Copyright © 2005 OPTICOM GmbH www. opticom. de
One of the major advantages of PESQ over other measurement approaches is that it does not need to make any assumptions on the network under test or the distortion types that may occur in a specific telephony test scenario. The only prerequisite employed within the model is the scientific knowledge on how human speech is produced and how humans perceive it.
PESQ already includes the effects of both packet level impairments (loss, jitter) and signal related impairments such as noise, clipping and distortions caused by coding processes. The impairment model, based on this knowledge is as generic as it can be and therefore independent from current and future telephony applications and networks.
About OPTICOM
With PSQM, PESQ and PEAQ, OPTICOM GmbH, the pioneer in perceptual quality testing has been providing three international world-class standards for voice and audio quality measurement since its foundation in 1995. With their new single-sided speech quality measure 3SQMTM, a joint development with partners, the perceptual experts from Germany now presented their fourth ITU standard. [. . . ] All brand and product names are trademarks and/or registered trademarks of their respective owners. [. . . ]
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