Perceptual Audio Test
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PESQ and POLQA software options forAPx500 Perceptual audio testing with APx audio analyzers P esqAi crag e P-ioj ecL ag Audw Precision APxSQO . l-jvjl Path Daj-cfl.Ci " MOEAv*aja| P.SHI APx500 PESQ software option measurement pane and G.R.A.S. KEMAR manikin with mobile phone (not included) PESQ or POLQA available Integrated perceptual analysis of degradations in voice signals. Objective, repeatable results using algorithms that conform to international standards. High correlation with subjective Automatic time alignment. Use with any APx audio interfaces: AES3 and S/PDIF digital, HDMI, Bluetooth™, and serial digital. Incorporate into any APx project APx Perceptual Audio tests AP offers PESQ and POLQA Perceptual Audio tests as software options for Many voice communications devices, notably mobile phones and Bluetooth® accessories, employ codecs and DSP that significantly alter sound in order to accommodate low bitrate and lossy networks. Despite these compromises, people understand one another quite well over these systems; this is because the adjustments are selected to allow adequate speech perception despite measurable shortcomings in distortion, frequency response, and other traditional audio measurements. The Perceptual Evaluation of Speech Quality (PESQ) and Perceptual Objective Listening Quality Assessment (POLQA) test methodologies are widely used to quantify speech quality in telecommunications and voice-specific audio. Developed by OPTICOM GmbH, PESQ and POLQA form the basis of ITU-T Recommendations P.862 and P.863, respectively. PESQ targets low bandwidth devices such as telephones, smartphones and hands-free devices, while POLQA extends perceptual audio test to encompass wide-band speech, acoustic interfaces and more. Results from each are expressed as MOS (Mean Opinion Score) directly in APx500, and achieve a very high correlation with results obtainable using human subjects in a way that is faster, more repeatable, less expensive, and fully automated. Test methodology In traditional perceptual measurements, a group of people is assembled and asked to compare speech samples before and after processing by a device or network.The resulting comparative sound quality is ranked on a scale from I to 5; the average of these responses is the Mean Opinion Score (MOS).

PESQ and POLQA use psycho-acoustic modeling to closely predict results obtained from real human subjects. Measurements obtained are unaffected by human temperament or test conditions, and the results are completely Perceptual audio testing in APx500 Both PESQ and POLQA in APx500 provide standard MOS results for a single speech sample. The PESQ/POLQA Average measurement allows you to run a collection of different voice samples and then display the resulting overall The PESQ/POLQA measurements may also return results in a quality vs. time display to help pinpoint specific problems such as...