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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
A N A L Y Z E R
Echo Algorithm
Description:
Sample rates:
Sound file formats:
Max. duration of measurement signals:
Gain Compensation:
Maximum echo delay:
Frame size:
Averaging window size:
Automated operation:
Available Measurement Results:
Additional Features:
PEAQ Algorithm
Description:
Algorithm:
Sample rates:
F O R
T H E
O P E R A ™
Includes PESQ conformance test samples,
Includes PSQM conformance test samples
Algorithm using real speech as stimulus for calculating
echo. Measures the Echo return Loss (ERL) in terms of
attenuation
and
delay
representation of the ERL vs. Delay.
8 kHz and 16 kHz
WAVE-files containing A-law, mu-law, linear PCM (8 or 16
bit)
As defined by WAVE-format
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. BS.1387. 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).
Based on standard ITU-R rec. BS.1387
48 kHz (according to recommendation ITU-R BS.1387),
44.1 kHz
7
O B J E C T I V E
P E R C E P T U A L
values.
Includes
graphical
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