GL's Echo Measurement Utility (EMU) software is an offline adjunct analysis application (under control of VQuad™) that compares the source and received files to determine echoes and delay of echoes. EMU software assesses sidetone, line, and acoustic echo and the corresponding delays.
Echo Measurement Utility Software (EMU) measures Echo Path Delay (EPD) and Echo Return Loss (ERL) of voice calls. Echo can be as simple as sidetone, or more complex such as line, and acoustic echo. The EMU when combined with GL’s VQuad™, T1 E1 Analyzers, MAPS™ Emulators, or Voiceband Analyzer, additional voice quality metrics such as round-trip delay (RTD), voice quality, and noise can also be measured.
To provide a comprehensive assessment of voice quality irrespective of network type, GL has combined various tools together into one platform consisting of VQuad™, Dual UTA HD, USB T1 E1, and WEBViewer™. This platform provides the ability to make VoIP, TDM, and Mobile calls from any fixed or mobile location. All interface flexibility is provided (2Wire, 4Wire, VoIP, TDM, and Mobile) within the Dual UTA HD and USB T1 E1 Analyzers. In addition, VQuad™ provides algorithms for signaling, voice transmission, and voice quality assessment. WEBViewer™ provides the central point where voice metrics are stored and displayed through a WEB interface.
- Echo, delay, and voice quality analysis of voice calls in VoIP, TDM, 2Wire, 4Wire, and Mobile networks.
- Measures EPD in msec and ERL in dB.
- Compares source and received files to detect maximum of 4 echoes (maximum of four instances).
- Ability to automate the entire test process using VQuad™ scripting; including sending the results to the central database for access via GL's WebViewer™.
- EMU uses EMU Client software to automatically detect the incoming degraded voice files and send the measurements to database after analysis.
- Detailed offline analysis.
- Detect Acoustic/Line (Hybrid) echoes and evaluate intermittent echoes
- Supports Auto and Manual methods of operation.
- Graphically displays source signal, received signal, error signal, and adaptive filter coefficients.
- Allows zoom-in on each graph, exporting snapshots of these graphs to files for later analysis.
- Calculates adaptive filter coefficients and echo characteristics for the error signal.
- Speaker option to play the audio files (intrusive and non-intrusive)
- Option to zoom-in on any particular echo to investigate further