User manual OPTICOM PT509Z DATASHEET

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Manual abstract: user guide OPTICOM PT509ZDATASHEET

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[. . . ] 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. 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 Front-end clipping FEC measurement1 (PESQ) Hold-over time HOT measurement1 (PESQ) Background noise measurement1 (PESQ) Utterances detection1 (PESQ) Delay histogram1 (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 · · · · · · · · 1 Available Q4/2001 1 TECHNICAL SPECIFICATION FOR THE OPERATM SOFTWARE SUITE V3. 0 Graphical Displays · Time signal displays, zoomable FFT Spectra displays, zoomable Excitation and various psychoacoustic parameters, like NMR, Masked Threshold and Loudness Audible distortion measurement Result summary display with MOV, PSQM MOS, PESQ MOS and PEAQ ODG numerical scores and bar graphs Delay Jitter vs. Delay · · · · · · Feature Description PESQ Measurement Description: Perceptual measurement of speech quality according to ITU-T rec. Capable of handling varying delays and severe distortions as they occure in VoIP applications. P. 862 8 kHz and 16 kHz WAVE-files containing A-law, mu-law, linear PCM (8 or 16 bit) Algorithm standard: Sample rates: Sound file formats: Max. duration of measurement signals: As defined by WAVE-format Gain Compensation: Automated operation: Available Measurement Results: Maximum gain difference = ±60 dB Supported Timesignal, Delay vs. Time, PESQ MOS, Jitter, Minimum, maximum and average delay, Front-end clipping FEC1, Hold-over time HOT1, Attenuation1, Background noise1, Signal-to-noise (SNR) measurement, MOS of silent and speech portions, Detailed analysis of silent and speech portions, Utterances detection1, Delay histogram1 1 Available Q4/2001 2 TECHNICAL SPECIFICATION FOR THE OPERATM SOFTWARE SUITE V3. 0 Additional Features: File-based measurements, Printing and graph exporting functionality, Includes official ITU voice samples for testing, Includes PESQ conformance test samples, Includes PSQM conformance test samples Perceptual measurement of speech quality according to ITU-T rec. Distorted), PSQM according to P. 861, silence weight = 0. 0 (PSQM-W0), PSQM according to P. 861, silence weight = 0. 2 (PSQM-W2), PSQM according to P. 861, silence weight = 0. 4 (PSQM-W4), PSQM value of the silent intervals (PSQM-Silence), Mean Opinion Score (MOS), silence weight = 0. 0 (OMOSW0), Mean Opinion Score (MOS), silence weight = 0. 2 (OMOSW2), Mean Opinion Score (MOS), silence weight = 0. 4 (OMOSW4), Mean Opinion Score (MOS) according to PSQM+ (OMOS+), Mean Opinion Score (MOS) vs. Time, Delay between the Reference Signal and the output signal of the device under test, Attenuation of the test signal compared to the reference signal File-based measurements, Trigger functionality, 5 Additional Features: TECHNICAL SPECIFICATION FOR THE OPERATM SOFTWARE SUITE V3. 0 Printing and graph exporting functionality, Includes official ITU voice samples for testing, Includes PESQ conformance test samples, Includes PSQM conformance test samples Echo Algorithm Description: Algorithm using real speech as stimulus for calculating echo. Measures the Echo return Loss (ERL) in terms of attenuation and delay values. 8 kHz and 16 kHz WAVE-files containing A-law, mu-law, linear PCM (8 or 16 bit) Sample rates: Sound file formats: Max. duration of measurement signals: As defined by WAVE-format Gain Compensation: Maximum echo delay: Frame size: Averaging window size: Automated operation: Available Measurement Results: Maximum gain difference = ±60 dB 1000 ms 16 ms at 8 kHz 800 ms at 8 kHz Supported Timesignal, Echo Return Loss (ERL) vs. Delay, Momentary attenuation of the highest echo peak (ERLmom), Momentary delay of the highest echo peak (ERLmom Delay), Attenuation of the highest echo peak during the whole measurement period (ERLpeak), Delay of the highest echo peak during the whole measurement period (ERLpeak Delay) File-based measurements, Printing and graph exporting functionality, Includes official ITU voice samples for testing, Includes PESQ conformance test samples, Includes PSQM conformance test samples Perceptual measurement of wide band audio according to ITU-R rec. Includes the basic version of PEAQ, defined for computational efficiency and the advanced version yielding for highest possible accuracy. Detailed analysis of test signals through BS. 1387 model output variables (MOVs). [. . . ] Includes the basic version of PEAQ, defined for computational efficiency and the advanced version yielding for highest possible accuracy. Detailed analysis of test signals through BS. 1387 model output variables (MOVs). BS. 1387 48 kHz (according to recommendation ITU-R BS. 1387), 44. 1 kHz Additional Features: PEAQ Algorithm Description: Algorithm: Sample rates: 6 TECHNICAL SPECIFICATION FOR THE OPERATM SOFTWARE SUITE V3. 0 Sound file formats: WAVE-files containing A-law, mu-law, linear PCM (8 or 16 bit) Max. [. . . ]

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