Opticom OPR-000-XXX-S V3.0 TECHNICAL SPECIFICATION

Technical Specification

for the OPERA™ Software Suite V3.0

OPR-000-XXX-S

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Copyright © 2001 by OPTICOM GmbH · www.opticom.de

TECHNICAL SPECIFICATION FOR THE OPERA™ SOFTWARE SUITE V3.0

Feature Overview

Voice Quality Measurement

• 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

• PSQM, perceptual speech quality measure according to ITU-T rec. P.861 [1996]

• PSQM+, advanced perceptual speech quality measure according to ITU-T COM 12-20 [1998]

• 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

• Echo measurement based on real speech, Echo Return Loss ERLmom, ERLpeak, ERL vs. delay

• One way delay measurement, with PESQ also delay jitter vs.time

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• Front-end clipping FEC measurement

• Hold-over time HOT measurement

• Background noise measurement

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• Utterances detection

• Delay histogram

(PESQ)

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(PESQ)

(PESQ)

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(PESQ)

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(PESQ)

• Signal-to-noise SNR measurement of speech and silence portions of a test signal

• Official ITU voice samples for testing and conformance verification

Audio Quality Measurement

• PEAQ, perceptual evaluation of audio quality according to ITU-R rec. BS.1387 [1999], Basic and
Advanced Model

• Result logging functionality, including user definable log intervals and quality score threshold

• Official ITU audio samples for testing and conformance verification

Common Functionality

• Advanced delay compensation for end-to-end measurements, suitable for constant and variable
delays (VoIP), developed by OPTICOM

• Delay measurement with real speech/music. Results in samples as well as ms

• Attenuation measured in dB

• File-based analysis capability

• Comprehensive scripting interface

• Trigger functionality for targeted analysis long duration test signals (PEAQ and PSQM)

• Graphical user interface

• Extensive scripting and command line options for automated testing

• Printing and graph exporting functionality

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Available Q4/2001

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