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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
Graphical Displays
•
Time signal displays, zoomable
•
FFT Spectra displays, zoomable
•
Excitation and various psychoacoustic parameters, like NMR, Masked Threshold and Loudness
•
Audible distortion measurement
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Result summary display with MOV, PSQM MOS, PESQ MOS and PEAQ ODG numerical scores
and bar graphs
•
Delay Jitter vs. Time min/max scores and graph (PESQ)
•
Echo Return Loss vs. Delay
Feature Description
PESQ Measurement
Description:
Algorithm standard:
Sample rates:
Sound file formats:
Max. duration of measurement signals: As defined by WAVE-format
Gain Compensation:
Automated operation:
Available Measurement Results:
Available Q4/2001
1
F O R
T H E
O P E R A ™
Perceptual measurement of speech quality according to ITU-T
rec. P.862. Indicates call clarity. Results can be directly
compared to subjective listening tests. Capable of handling
varying delays and severe distortions as they occure in VoIP
applications.
Based on standard ITU-T rec. P.862
8 kHz and 16 kHz
WAVE-files containing A-law, mu-law, linear PCM (8 or 16
bit)
Maximum gain difference = ±60 dB
Supported
Timesignal,
Delay vs. Time,
PESQ MOS,
Jitter,
Minimum, maximum and average delay,
Front-end clipping FEC
Hold-over time HOT
,
1
Attenuation
,
1
Background noise
,
1
Signal-to-noise (SNR) measurement,
MOS of silent and speech portions,
Detailed analysis of silent and speech portions,
Utterances detection
,
1
Delay histogram
1
2
S O F T W A R E
S U I T E
,
1
V 3 . 0
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