MOS - Latency Measurement
Audio Quality Assessment in Air Traffic Control Communications
Audio & voice quality experience
 

Air Traffic Control

Overview

Air Traffic Control (ATC) depends on voice communications that are clear, reliable, and intelligible. Whether for ground-to-ground coordination between control centers or air-to-ground exchanges with pilots, voice quality is mission-critical.

Any degradation in audio performance — including distortion, latency, or intelligibility loss — can directly affect operational efficiency and, above all, safety.

In complex ATC environments, the communication chain includes multiple interconnected audio systems such as radios, gateways, recording systems, and switching equipment. Each element may introduce gain variations, noise, or signal processing effects, making objective end-to-end voice quality assessment particularly challenging.

In the transition toward IP-based and 5G-enabled communications for critical services, these challenges become even more significant. New network architectures can introduce latency, jitter, and audio processing variability, requiring objective and advanced measurement tools to ensure performance equal to or better than legacy systems.

 

Air Navigation Service Providers (ANSPs) Challenges

  • Accurately measure voice quality across the entire communication path
  • Reproduce realistic operational scenarios without disrupting live traffic
  • Identify degradations introduced at different points in the audio chain
  • Ensure compliance with strict performance and safety requirements

 

Operational Value for ANSPs

 
 Upgrade Validation  Audio diagnostics Continuous monitoring Acceptance testing
Quality verification after updates and system changes Rapid anomaly identification across the audio chain 24/7 supervision with automated MOS alerts Equipment compliance validation against standards

Features and benefits

End-to-end voice quality measurement
End-to-end voice quality measurement
Objective measurements via PESQ and POLQA (ITU-T P.863), providing MOS values that reflect perceived audio quality.
Realistic communication emulation
Realistic communication emulation
By replacing both the speaker and the listener, tests are performed under real operational conditions without human intervention
End-to-end latency measurement
End-to-end latency measurement
Latency measured by comparing the reference signal with the received signal, highlighting discrepancies that may impair comprehension
Intelligibility measurement
Intelligibility measurement
Based on ABC-MRT16, providing a clarity and comprehensibility indicator for end-to-end audio — critical for ATC safety margins
Configurable audio calibration
Configurable audio calibration
Fine-tuning of input/output levels to meet the technical specifications of the tested environment and ensure accurate, consistent measurements
Automated Monitoring
Automated Monitoring
Automated campaigns ensure consistent benchmarking over time and facilitate regression analysis after updates or reconfiguration.
Documents
Access the technical files you need to optimize your audio quality measurement systems.
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