Understanding MOS Menu: A Measure of Perceived Quality

The Mean Opinion Score (MOS) menu is a widely used metric in subjective quality evaluation tests to assess the perceived quality of a given stimulus. In this article, we will delve into the details of how MOS is calculated and its significance in various fields.

Calculating MOS

MOS is calculated as an arithmetic mean over single ratings performed by human subjects for a specific stimulus. The ratings are usually obtained using different scales, which can range from continuous scales like 1-100 to standardized quality rating scales such as the Absolute Category Rating scale (ACR). ACR maps ratings between Bad and Excellent to numbers between 1 and 5, making it one of the most commonly used scales.

Purpose of MOS

The purpose of MOS is to provide a single rational number that represents the overall perceived quality of a stimulus or system. In telecommunications engineering, for instance, MOS is used to measure video, audio, and audiovisual quality evaluation. This score can range from 1 (lowest perceived quality) to 5 (highest perceived quality).

Types of MOS

ITU-T has defined various ways to refer to MOS in Recommendation ITU-T P.800.1, depending on the type of test conducted. For example, there are different MOS scores for audiovisual, conversational, listening, talking, and video quality tests.

Estimating MOS

While subjective quality evaluation tests are usually used to gather ratings, MOS can also be algorithmically estimated using various methods. This allows for more efficient testing and assessment of perceived quality.

In conclusion, the Mean Opinion Score (MOS) menu is a widely used measure in the domain of Quality of Experience and telecommunications engineering. By understanding how MOS is calculated and its significance, we can better appreciate its importance in evaluating the perceived quality of various stimuli and systems.

Mos menu