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T E C H N I C A L
S P E C I F I C A T I O N
Feature Overview
Voice Quality Measurement
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PESQ, perceptual evaluation of speech quality according to ITU-T rec. P.862 [2001]. Combines
PSQM with PAMS, optimized for VoIP and hybrid end-to-end applications
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PSQM, perceptual speech quality measure according to ITU-T rec. P.861 [1996]
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PSQM+, advanced perceptual speech quality measure according to ITU-T COM 12-20 [1998]
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PSQM/IP, perceptual speech quality measure according to ITU-T rec. P.861 [1996], incl.
advanced delay compensation for end-to-end measurements, developed by OPTICOM
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Echo measurement based on real speech, Echo Return Loss ERLmom, ERLpeak, ERL vs. delay
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One way delay measurement, with PESQ also delay jitter vs.time
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Front-end clipping FEC measurement
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Hold-over time HOT measurement
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Background noise measurement
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Utterances detection
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Delay histogram
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Signal-to-noise SNR measurement of speech and silence portions of a test signal
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Official ITU voice samples for testing and conformance verification
Audio Quality Measurement
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PEAQ, perceptual evaluation of audio quality according to ITU-R rec. BS.1387 [1999], Basic and
Advanced Model
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Result logging functionality, including user definable log intervals and quality score threshold
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Official ITU audio samples for testing and conformance verification
Common Functionality
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Advanced delay compensation for end-to-end measurements, suitable for constant and variable
delays (VoIP), developed by OPTICOM
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Delay measurement with real speech/music. Results in samples as well as ms
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Attenuation measured in dB
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File-based analysis capability
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Comprehensive scripting interface
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Trigger functionality for targeted analysis long duration test signals (PEAQ and PSQM)
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Graphical user interface
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Extensive scripting and command line options for automated testing
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Printing and graph exporting functionality
Available Q4/2001
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