Automated Volume Control for MOS Measurement Equipment
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Solution Overview
Problem
Conventional MOS measurement methods rely on manual volume control, leading to potential manipulation errors and inefficiencies, particularly when testers are distant from measurement equipment, resulting in low objective measurement reliability and high costs.
Innovation Solution
A method that automatically adjusts the volume level of communication speech by transmitting intrinsic audible frequency signals to control the volume level, ensuring it reaches a predetermined optimal level, even when the tester is remote from the measurement equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual volume control is used by testers, then volume adjustment is possible, but manipulation errors occur and objectivity is reduced
Solution Approach 1:
The system automatically controls its own volume level by measuring the communication speech volume and adjusting it according to predetermined criteria without requiring tester intervention. The measurement equipment performs self-adjustment based on the volume measurement results, eliminating manual control and its associated errors.
Solution Approach 2:
The system measures the volume level of communication speech and uses this feedback to automatically adjust the volume. The volume measurement result is transmitted back to the measurement equipment, which then adjusts the volume accordingly, creating a closed-loop control system that ensures objective and consistent volume control.
2Ease of operation
If testers manually control volume at distant equipment, then volume adjustment is possible, but measurement time and manpower increase
Solution Approach 1:
The measurement equipment automatically performs volume control without requiring testers to physically move to or operate the equipment. The system measures and adjusts volume autonomously, eliminating the time and effort previously required for manual intervention at distant equipment locations.
Solution Approach 2:
The patent replaces the mechanical approach of physical volume control (manual adjustment by testers) with an automated electronic control system. The volume is controlled through electronic signal processing and automatic adjustment mechanisms, eliminating the need for physical presence and manual operation.
3Adaptability or versatility
If volume level varies due to network environment or terminal characteristics, then communication speech quality changes, but MOS value reliability decreases
Solution Approach 1:
The system continuously measures the volume level of communication speech and uses this feedback to make real-time adjustments. By monitoring the actual volume and comparing it to target levels, the system compensates for variations caused by different network environments and terminal characteristics, maintaining consistent MOS measurement conditions.
Solution Approach 2:
The system dynamically adjusts volume parameters based on measured conditions. When volume variations are detected due to network or terminal differences, the system changes the volume parameter automatically to maintain the optimal level for MOS measurement, ensuring reliability across different communication environments.
Data Source
AI summary
The present invention relates to a method of automatically controlling the volume level of communication speech for Mean Opinion Score (MOS) measurement, which, before evaluating the quality of communication speech using a MOS measurement method, automatically controls the volume level of actual communication speech to a predetermined optimal level, thus improving the reliability of MOS values.The present invention provides a method of automatically controlling a volume level of communication speech for MOS measurement using MOS measurement equipment, the MOS measurement equipment calculating an MOS value based on results obtained by comparing a speech signal, which is received via a voice communication network, with a reference speech signal, the method comprising the steps of (a) when an audio signal, including a speech signal, is received from counterpart MOS measurement equipment in a predetermined format, measuring the volume level of the speech signal and comparing the volume level of the measured speech signal with a reference volume level; (b) transmitting a predetermined intrinsic audible frequency signal, which corresponds to ‘proper,’‘excess’ or ‘insufficiency’ information resulting from the comparison, to the counterpart MOS measurement equipment; and (c) the counterpart MOS measurement equipment interpreting the predetermined intrinsic audible frequency signal, which corresponds to the ‘proper,’‘excess’ or ‘insufficiency’ information, and controlling the volume level of the communication speech.