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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  

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 (File-based measurements), 

     ±500 

ms 

(On-line 

measurements) 

Static Delay:    

 

 

Automatic Delay Compensation ±10 s 

Delay Tracking:  

 

 

±512 samples 

Automated 

operation: 

  Supported 

Available Measurement Results: 

Timesignal, 
Spectrum, 
Excitation, 
Noise-to-Mask Ratio (NMR), averaged, 
Noise-to-Mask Ratio (NMR) vs. Time, 
Masked Threshold, 
Loudness, 
Objective Difference Grade (ODG), averaged (Advanced and 
Basic Version), 
Objective Difference Grade (ODG) vs. Time, 
Distortion Index (DI), for the Advanced and the Basic Version, 
Delay between the Reference Signal and the output signal of 
the device under test, 
Attenuation of the test signal compared to the reference 
signal, 
Modulation of the reference and test signal 

BS.1387 intermediate results (MOVs):  Average Bandwidth of the Reference Signal (AvgBwRef), 

Average Bandwidth of the output signal of the device under 
test (AvgBwTst), 
Total Noise-to-Mask Ratio (NMRtotB), 
Relative fraction of frames for which at last one frequency 
band contains a significant noise component (RDF), 
Average Distorted Block (=Frame), taken as the logarithm of 
the ratio of the total distortion to the total number of severely 
distorted frames (ADB), 
Maximum of the Probability of Detection after low pass 
filtering (MFPD), 
Harmonic structure of the error over time (EHS), 
Windowed averaged difference in modulation (envelopes) 
between Reference Signal and Signal Under Test 
(WinModDif1B), 
Averaged modulation difference (AModDif1B), 
Averaged modulation difference with emphasis on introduced 
modulations and modulation changes where the reference 
contains little or no modulations (AmodDif2B, RModDifA), 
RMS value of the averaged noise loudness with emphasis on 
introduced components (NloudB, NLA), 
Averaged Linear Distortions (ALD) 

Содержание OPERA SOFTWARE SUITE - V3.0

Страница 1: ...ge All brand and product names are trademarks and or registered trademarks of their respective owners All rights reserved Copyright 2001 by OPTICOM GmbH www opticom de Technical Specification for the...

Страница 2: ......

Страница 3: ...urement1 PESQ Utterances detection1 PESQ Delay histogram1 PESQ Signal to noise SNR measurement of speech and silence portions of a test signal Official ITU voice samples for testing and conformance ve...

Страница 4: ...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...

Страница 5: ...n 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 Exci...

Страница 6: ...mum 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...

Страница 7: ...atic Delay Compensation 10 s Delay Tracking 512 samples Automated operation Supported Available Measurement Results Timesignal Spectrum Excitation Percentage of silent intervals during measurement Sil...

Страница 8: ...operation Supported Available Measurement Results Timesignal Echo Return Loss ERL vs Delay Momentary attenuation of the highest echo peak ERLmom Momentary delay of the highest echo peak ERLmom Delay A...

Страница 9: ...the test signal compared to the reference signal Modulation of the reference and test signal BS 1387 intermediate results MOVs Average Bandwidth of the Reference Signal AvgBwRef Average Bandwidth of t...

Страница 10: ...udio samples for testing Includes PEAQ conformance test samples System Requirements Processor Intel Pentium III 500 MHz or above RAM 128 MB 256 MB are recommended Screen resolution 1024 768 64k colour...

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