User manual OPTICOM PESQ DATASHEET 05-11-14

[. . . ] 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. It compares the audio signal input to a network with the corresponding (degraded) audio signal output from the network. [. . . ] 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. This information may be subject to change. 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. At its 10th anniversary, the presentation of the new PEVQTM video measure leverages the company's huge experience towards the multimedia testing domain. Recognized an industry reference, OPTICOM's OPERA voice/audio quality test tools are available to users world wide. [. . . ] All brand and product names are trademarks and/or registered trademarks of their respective owners. Copyright © 2005 OPTICOM GmbH ­ www. opticom. de [. . . ]