OPTICOM OPERA SOFTWARE SUITE - V3.0 Page 5 Technical Specification Download

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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 F O R T H E O P E R A ™ S O F T W A R E S U I T E V 3 . 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

PSQM Measurement

Description: Perceptual

measurement of speech quality according to ITU-T

rec. P.861. Indicates call clarity. Includes highly optimized
proprietary mapping from raw PSQM values to P.800 Mean
Opinion Score (MOS) scale. Results can be directly compared
to subjective listening tests.

Algorithm standard:

Based on standard ITU-T rec. P.861

Sample rates:

8 kHz and 16 kHz

Sound file formats:

WAVE-files containing A-law, mu-law, linear PCM (8 or 16
bit)

Max. duration of measurement signals: As defined by WAVE-format

Gain Compensation:

Maximum gain difference = ±60 dB

Automatic Delay Compensation:

±1000 ms

Static Delay:

Automatic Delay Compensation ±10 s

Automated

operation:

Supported

Available Measurement Results:

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) 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