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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
PSQM/IP Measurement
Description:
Algorithm standard:
Sample rates:
Sound file formats:
Max. duration of measurement signals: As defined by WAVE-format
Gain Compensation:
Automatic Delay Compensation:
Static Delay:
Delay Tracking:
Automated operation:
Available Measurement Results:
Additional Features:
F O R
T H E
O P E R A ™
Printing and graph exporting functionality,
Includes official ITU voice samples for testing,
Includes PESQ conformance test samples,
Includes PSQM conformance test samples
Same as PSQM and PSQM+. Includes advanced time
alignment algorithm to cope with static and variable latencies,
developed by OPTICOM (Delay Tracking functionality).
Based on standard ITU-T rec. P.861
8 kHz and 16 kHz
WAVE-files containing A-law, mu-law, linear PCM (8 or 16
bit)
Maximum gain difference = ±60 dB
±1000 ms
Automatic Delay Compensation ±10 s
±512 samples
Supported
Timesignal,
Spectrum,
Excitation,
Percentage of silent intervals during measurement (Silence),
Percentage of time clipped frames during measurement (Time
Clipped),
Percentage of severely distorted frames during measurement
(Sev. 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 (OMOS-
W0),
Mean Opinion Score (MOS), silence weight = 0.2 (OMOS-
W2),
Mean Opinion Score (MOS), silence weight = 0.4 (OMOS-
W4),
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,
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S O F T W A R E
S U I T E
V 3 . 0
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