Speech Level Analyser
The Digital Speech Level Analyser predicts a speech quality score and measures
the characteristics of the speech channel. It generates a linguistically
motivated artificial speech test signal and evaluates the resultant signal
after any network has processed it or network element, even those subject
to packet loss or variations in delay. The DSLA process can use any user-defined
sound signal for testing. The PAMS process compares the original and received
signal and determines Mean Opinion Score predictions, on a scale of 1-5,
for the listening quality and listening effort. The DSLA has created a
linguistically motivated artificial speech signal that contains a selection
of sounds put together in provide a brief speech signal that does not contain
the redundancy of real speech or the DSLA test signals can be defined entirely
by the user instead.
A Windows user interface is provided for an optimum environment so that test
processes can be quickly defined and implemented. The user has options to
align the signal levels to the system under evaluation, to generate the
Phonytalk test signal in a variety of modes, to record the results
of measurements on the received signal for subsequent analysis and to record
the received signal. The two channel Digital Speech Level Analyzer operates
in 4-wire mode or as a telephone device.
Generate the DSLA artificial speech test signal in different languages.
Measure the quality of the speech transmission in terms of listening effort
and listening quality on a scale of one to five.
Measure delay, echo, and noise.
Measure, repeatably, the mean active speech level in accordance with ITU
Recommendation P.56 Method B.
Measure Voice Activity Detector operation.
Measure Comfort Noise Level in the presence of speech.
Make test calls, measure and record the results as well as the signal from
the network element under test.
DSLA Analyser Version: 3.2
Test Lab 16th Floor , Router Configuration PC
Physical Location or link to software: Printed Manual or Online help
Other Available Training:
Last revised: lak 05/08/2000