Real-Time VoIP Voice Quality Measurement via RTCP Lookup
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Solution Overview
Problem
Conventional voice quality measurement techniques in VoIP systems are inadequate as they do not accurately measure voice quality during live calls, failing to account for the dynamic nature of the speech signal, acoustic environment, and VoIP channel dynamics, and often require costly subjective testing or produce inaccurate results.
Innovation Solution
A method and apparatus that determine a voice quality factor in real-time by inputting network quality parameters into a lookup table, using a processor and controller to select a predefined voice quality metric based on parameters such as packet delay, jitter, packet loss, and signal energy, allowing for dynamic voice quality measurement during live VoIP calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional voice quality measurement techniques are used, then measurement cost is reduced or simplified, but measurement precision and accuracy deteriorate
Solution Approach 1:
The patent introduces RTCP (Real-Time Control Protocol) as an intermediary mechanism to carry voice quality measurement data between endpoints and network monitors. RTCP packages contain synthesized transfer characteristics that enable accurate voice quality assessment without requiring complex subjective testing systems, thus resolving the contradiction between measurement precision and device complexity
Solution Approach 2:
The patent replaces traditional mechanical/acoustic measurement systems with digital signal processing and network-based monitoring. By using digital packet analysis, RTCP protocols, and automated algorithms to measure voice quality parameters, the system achieves high measurement precision while eliminating the need for costly subjective testing and complex physical measurement equipment
2Measurement precision
If real-time voice quality measurement during live calls is implemented, then voice quality assessment accuracy improves, but network overhead increases
Solution Approach 1:
The patent merges voice quality measurement functionality with existing RTCP protocols that are already part of standard VoIP communications. By combining measurement data with routine control signaling, the system achieves real-time voice quality assessment during live calls without requiring separate dedicated measurement channels, thus minimizing additional network overhead
Solution Approach 2:
The patent implements self-service measurement where endpoints automatically generate and exchange RTCP packets containing voice quality metrics. The measurement system serves itself by utilizing the existing communication infrastructure and protocols, eliminating the need for external probing or additional network resources while maintaining real-time assessment capability
Data Source
AI summary
In a method and apparatus for measuring voice quality of an endpoint in a Voice-over-IP (VoIP) network, a plurality of network quality parameters are determined for the endpoint. A voice quality factor for the endpoint is determined in real time based on the network quality parameters.