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
2
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. Time min/max scores and graph (PESQ)
•
Echo Return Loss vs. Delay
Feature Description
PESQ Measurement
Description: 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.
Algorithm standard:
Based on standard ITU-T rec. P.862
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
Automated
operation:
Supported
Available Measurement Results:
Timesignal,
Delay vs. Time,
PESQ MOS,
Jitter,
Minimum, maximum and average delay,
Front-end clipping FEC
1
,
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
1
Available Q4/2001
Содержание OPERA SOFTWARE SUITE - V3.0
Страница 2: ......
