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Mean opinion score (MOS) is a measure used in the domain of Quality of Experience and telecommunications engineering, representing overall quality of a stimulus or system. It is the arithmetic mean over all individual "values on a predefined scale that a subject assigns to his opinion of the performance of a system quality". [ 1 ]
POLQA covers a model to predict speech quality, [3] [4] by means of digital speech signal analysis. The predictions of those objective measures should come as close as possible to subjective quality scores as obtained in subjective listening tests. Usually, a Mean Opinion Score (MOS) is predicted.
A "full reference" (FR) algorithm has access to and makes use of the original reference signal for a comparison (i.e., a difference analysis). It can compare each sample of the reference signal (talker side) to each corresponding sample of the degraded signal (listener side).
A measurement system analysis (MSA) is a thorough assessment of a measurement process, and typically includes a specially designed experiment that seeks to identify the components of variation in that measurement process. Just as processes that produce a product may vary, the process of obtaining measurements and data may also have variation ...
Examples of the focus of such adaptations include the triple bottom line, [25] decision support, [32] public sector management, [33] and health care management. [34] The performance management elements of the UN's Results Based Management system have strong design and structural similarities to those used in the 3rd Generation Balanced ...
For example, possible results in the middle range are MOS = 3, 3-1/8, 3-1/4, 3-3/8, 3-1/2, 3-5/8, etc. where 8 opinion scores are averaged together. However, an important use of MOS listening tests is to evaluate differences in MOS, possibly small, between different audio processes such as codecs, telephone links, etc. After going to the ...
Piotroski F-score is a number between 0 and 9 which is used to assess strength of company's financial position. The score is used by financial investors in order to find the best value stocks (nine being the best). The score is named after Stanford accounting professor Joseph Piotroski. [1]
The main advantage over the mean opinion score (MOS) methodology (which serves a similar purpose) is that MUSHRA requires fewer participants to obtain statistically significant results. [ citation needed ] This is because all codecs are presented at the same time, to the same participants, such that a paired t-test or repeated measures analysis ...